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Tsukada K, Abe Y, Enokizono A, Goke T, Hara M, Honda Y, Hori T, Ichikawa S, Ito Y, Kurita K, Legris C, Maehara Y, Ohnishi T, Ogawara R, Suda T, Tamae T, Wakasugi M, Watanabe M, Wauke H. First Observation of Electron Scattering from Online-Produced Radioactive Target. Phys Rev Lett 2023; 131:092502. [PMID: 37721815 DOI: 10.1103/physrevlett.131.092502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 06/21/2023] [Indexed: 09/20/2023]
Abstract
We successfully performed electron scattering off unstable nuclei which were produced online from the photofission of uranium. The target ^{137}Cs ions were trapped with a new target-forming technique that makes a high-density stationary target from a small number of ions by confining them in an electron storage ring. After developments of target generation and transportation systems and the beam stacking method to increase the ion beam intensity up to approximately 2×10^{7} ions per pulse beam, an average luminosity of 0.9×10^{26} cm^{-2} s^{-1} was achieved for ^{137}Cs. The obtained angular distribution of elastically scattered electrons is consistent with a calculation. This success marks the realization of the anticipated femtoscope which clarifies the structures of exotic and short-lived unstable nuclei.
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Affiliation(s)
- K Tsukada
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
| | - Y Abe
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
| | - A Enokizono
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
- Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan
| | - T Goke
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
| | - M Hara
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
| | - Y Honda
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
| | - T Hori
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
| | - S Ichikawa
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
| | - Y Ito
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - K Kurita
- Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan
| | - C Legris
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
| | - Y Maehara
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - T Ohnishi
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
| | - R Ogawara
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
| | - T Suda
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
| | - T Tamae
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
| | - M Wakasugi
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
| | - M Watanabe
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
| | - H Wauke
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
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Yakushev A, Lens L, Düllmann CE, Khuyagbaatar J, Jäger E, Krier J, Runke J, Albers HM, Asai M, Block M, Despotopulos J, Di Nitto A, Eberhardt K, Forsberg U, Golubev P, Götz M, Götz S, Haba H, Harkness-Brennan L, Herzberg RD, Heßberger FP, Hinde D, Hübner A, Judson D, Kindler B, Komori Y, Konki J, Kratz J, Kurz N, Laatiaoui M, Lahiri S, Lommel B, Maiti M, Mistry AK, Mokry C, Moody KJ, Nagame Y, Omtvedt JP, Papadakis P, Pershina V, Rudolph D, Samiento L, Sato T, Schädel M, Scharrer P, Schausten B, Shaughnessy DA, Steiner J, Thörle-Pospiech P, Toyoshima A, Trautmann N, Tsukada K, Uusitalo J, Voss KO, Ward A, Wegrzecki M, Wiehl N, Williams E, Yakusheva V. On the adsorption and reactivity of element 114, flerovium. Front Chem 2022; 10:976635. [PMID: 36092655 PMCID: PMC9453156 DOI: 10.3389/fchem.2022.976635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 07/19/2022] [Indexed: 12/01/2022] Open
Abstract
Flerovium (Fl, element 114) is the heaviest element chemically studied so far. To date, its interaction with gold was investigated in two gas-solid chromatography experiments, which reported two different types of interaction, however, each based on the level of a few registered atoms only. Whereas noble-gas-like properties were suggested from the first experiment, the second one pointed at a volatile-metal-like character. Here, we present further experimental data on adsorption studies of Fl on silicon oxide and gold surfaces, accounting for the inhomogeneous nature of the surface, as it was used in the experiment and analyzed as part of the reported studies. We confirm that Fl is highly volatile and the least reactive member of group 14. Our experimental observations suggest that Fl exhibits lower reactivity towards Au than the volatile metal Hg, but higher reactivity than the noble gas Rn.
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Affiliation(s)
- A. Yakushev
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Mainz, Mainz, Germany
- *Correspondence: A. Yakushev,
| | - L. Lens
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - Ch. E. Düllmann
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Mainz, Mainz, Germany
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - J. Khuyagbaatar
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Mainz, Mainz, Germany
| | - E. Jäger
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - J. Krier
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - J. Runke
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - H. M. Albers
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - M. Asai
- Japan Atomic Energy Agency, Tokai, Japan
| | - M. Block
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Mainz, Mainz, Germany
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - J. Despotopulos
- Lawrence Livermore National Laboratory, Livermore, CA, United States
| | - A. Di Nitto
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - K. Eberhardt
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | | | | | - M. Götz
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Mainz, Mainz, Germany
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - S. Götz
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Mainz, Mainz, Germany
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | | | | | | | - F. P. Heßberger
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Mainz, Mainz, Germany
| | - D. Hinde
- Australian National University, Canberra, ACT, Australia
| | - A. Hübner
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - D. Judson
- University of Liverpool, Liverpool, United Kingdom
| | - B. Kindler
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | | | - J. Konki
- University of Jyväskylä, Jyväskylä, Finland
| | - J.V. Kratz
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - N. Kurz
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - M. Laatiaoui
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Mainz, Mainz, Germany
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - S. Lahiri
- Saha Institute of Nuclear Physics, Kolkata, India
| | - B. Lommel
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - M. Maiti
- Indian Institute of Technology Roorkee, Roorkee, India
| | - A. K. Mistry
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Mainz, Mainz, Germany
| | - Ch. Mokry
- Helmholtz-Institut Mainz, Mainz, Germany
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - K. J. Moody
- Lawrence Livermore National Laboratory, Livermore, CA, United States
| | - Y. Nagame
- Japan Atomic Energy Agency, Tokai, Japan
| | | | - P. Papadakis
- University of Liverpool, Liverpool, United Kingdom
| | - V. Pershina
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | | | | | - T.K. Sato
- Japan Atomic Energy Agency, Tokai, Japan
| | - M. Schädel
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - P. Scharrer
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Mainz, Mainz, Germany
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - B. Schausten
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - D. A. Shaughnessy
- Lawrence Livermore National Laboratory, Livermore, CA, United States
| | - J. Steiner
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - P. Thörle-Pospiech
- Helmholtz-Institut Mainz, Mainz, Germany
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | | | - N. Trautmann
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - K. Tsukada
- Japan Atomic Energy Agency, Tokai, Japan
| | | | - K.-O. Voss
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - A. Ward
- University of Liverpool, Liverpool, United Kingdom
| | - M. Wegrzecki
- Łukasiewicz Research Network—Institute of Electron Technology, Warsaw, Poland
| | - N. Wiehl
- Helmholtz-Institut Mainz, Mainz, Germany
- Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - E. Williams
- Australian National University, Canberra, ACT, Australia
| | - V. Yakusheva
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Mainz, Mainz, Germany
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Ikebe Y, Oshima M, Bamba S, Asai M, Tsukada K, Sato TK, Toyoshima A, Bi C, Seto H, Amano H, Kumada H, Morimoto T. Study of charged particle activation analysis (II): Determination of boron concentration in human blood samples. Appl Radiat Isot 2020; 164:109106. [PMID: 32819495 DOI: 10.1016/j.apradiso.2020.109106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 07/05/2019] [Accepted: 02/24/2020] [Indexed: 10/24/2022]
Abstract
Boron Neutron Capture Therapy (BNCT) is a radiotherapy for the treatment of intractable cancer. In BNCT precise determination of 10B concentration in whole blood sample before neutron irradiation of the patient, as well as accurate neutron dosimetry, is crucial for control of the neutron irradiation time. For this purpose ICP-AES and neutron induced prompt γ-ray analysis are generally used. In Ibaraki Neutron Medical Research Center (iNMRC), an intense proton beam will be accelerated up to 8 MeV, which can also be used for Charged Particle Activation Analysis (CPAA). Thus, in this study, we apply the CPAA utilizing the proton beam to non-destructive and accurate determination of 10B concentration in whole blood sample. A CPAA experiment is performed by utilizing an 8 MeV proton beam from the tandem accelerator of Nuclear Science Research Institute in Japan Atomic Energy Agency. The 478 keV γ-ray of 7Be produced by the 10B(p, α)7Be reaction is used to quantify the 10B in human blood. The 478 keV γ-ray intensity is normalized by the intensities of the 847 keV and 1238 keV γ-rays of 56Co originating from Fe in blood. The normalization methods were found to be linear in the range of 3.27 μg 10B/g to 322 μg 10B/g with correlation coefficients of better than 0.9999.
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Affiliation(s)
- Y Ikebe
- Japan Chemical Analysis Center, Sanno 295-3, Inage, Chiba, 263-0002, Japan.
| | - M Oshima
- Japan Chemical Analysis Center, Sanno 295-3, Inage, Chiba, 263-0002, Japan
| | - S Bamba
- Japan Chemical Analysis Center, Sanno 295-3, Inage, Chiba, 263-0002, Japan
| | - M Asai
- Japan Atomic Energy Agency, Shirakata 2-4, Tokai, Naka, Ibaraki, 319-1195, Japan
| | - K Tsukada
- Japan Atomic Energy Agency, Shirakata 2-4, Tokai, Naka, Ibaraki, 319-1195, Japan
| | - T K Sato
- Japan Atomic Energy Agency, Shirakata 2-4, Tokai, Naka, Ibaraki, 319-1195, Japan
| | - A Toyoshima
- Japan Atomic Energy Agency, Shirakata 2-4, Tokai, Naka, Ibaraki, 319-1195, Japan
| | - C Bi
- Japan Chemical Analysis Center, Sanno 295-3, Inage, Chiba, 263-0002, Japan
| | - H Seto
- Japan Chemical Analysis Center, Sanno 295-3, Inage, Chiba, 263-0002, Japan
| | - H Amano
- Japan Chemical Analysis Center, Sanno 295-3, Inage, Chiba, 263-0002, Japan
| | - H Kumada
- University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki, 305-8575, Japan
| | - T Morimoto
- Japan Chemical Analysis Center, Sanno 295-3, Inage, Chiba, 263-0002, Japan
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4
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Motoo I, Ando T, Ueda A, Ogawa K, Kajiura S, Hirano K, Okumura T, Tsukada K, Hara T, Suzuki N, Nakada N, Takatori S, Horikawa N, Fujii T, Yasuda I. P-178 Prognostic impact of immune-related adverse events with nivolumab or pembrolizumab monotherapy in patients with advanced gastric cancer: A multicenter retrospective analysis. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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5
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Nishi T, Itahashi K, Berg GPA, Fujioka H, Fukuda N, Fukunishi N, Geissel H, Hayano RS, Hirenzaki S, Ichikawa K, Ikeno N, Inabe N, Itoh S, Iwasaki M, Kameda D, Kawase S, Kubo T, Kusaka K, Matsubara H, Michimasa S, Miki K, Mishima G, Miya H, Nagahiro H, Nakamura M, Noji S, Okochi K, Ota S, Sakamoto N, Suzuki K, Takeda H, Tanaka YK, Todoroki K, Tsukada K, Uesaka T, Watanabe YN, Weick H, Yamakami H, Yoshida K. Spectroscopy of Pionic Atoms in ^{122}Sn(d,^{3}He) Reaction and Angular Dependence of the Formation Cross Sections. Phys Rev Lett 2018; 120:152505. [PMID: 29756883 DOI: 10.1103/physrevlett.120.152505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 02/07/2018] [Indexed: 06/08/2023]
Abstract
We observed the atomic 1s and 2p states of π^{-} bound to ^{121}Sn nuclei as distinct peak structures in the missing mass spectra of the ^{122}Sn(d,^{3}He) nuclear reaction. A very intense deuteron beam and a spectrometer with a large angular acceptance let us achieve a potential of discovery, which includes the capability of determining the angle-dependent cross sections with high statistics. The 2p state in a Sn nucleus was observed for the first time. The binding energies and widths of the pionic states are determined and found to be consistent with previous experimental results of other Sn isotopes. The spectrum is measured at finite reaction angles for the first time. The formation cross sections at the reaction angles between 0° and 2° are determined. The observed reaction-angle dependence of each state is reproduced by theoretical calculations. However, the quantitative comparison with our high-precision data reveals a significant discrepancy between the measured and calculated formation cross sections of the pionic 1s state.
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Affiliation(s)
- T Nishi
- Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - K Itahashi
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - G P A Berg
- Department of Physics and the Joint Institute for Nuclear Astrophysics Center for the Evolution of the Elements, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - H Fujioka
- Department of Physics, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502 Kyoto, Japan
| | - N Fukuda
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - N Fukunishi
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, D-64291 Darmstadt, Germany
| | - R S Hayano
- Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - S Hirenzaki
- Department of Physics, Nara Women's University, Kita-Uoya Nishimachi, Nara, 630-8506 Nara, Japan
| | - K Ichikawa
- Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - N Ikeno
- Department of Life and Environmental Agricultural Sciences, Faculty of Agriculture, Tottori University, 4-101 Koyamacho-Minami, Tottori, 680-8551 Tottori, Japan
| | - N Inabe
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - S Itoh
- Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - M Iwasaki
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - D Kameda
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - S Kawase
- Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - T Kubo
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - K Kusaka
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - H Matsubara
- Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - S Michimasa
- Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - K Miki
- Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - G Mishima
- Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - H Miya
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - H Nagahiro
- Department of Physics, Nara Women's University, Kita-Uoya Nishimachi, Nara, 630-8506 Nara, Japan
| | - M Nakamura
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - S Noji
- Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - K Okochi
- Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - S Ota
- Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - N Sakamoto
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - K Suzuki
- Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences, Boltzmanngasse 3, A-1090 Vienna, Austria
| | - H Takeda
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - Y K Tanaka
- Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - K Todoroki
- Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - K Tsukada
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - T Uesaka
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
| | - Y N Watanabe
- Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, D-64291 Darmstadt, Germany
| | - H Yamakami
- Department of Physics, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502 Kyoto, Japan
| | - K Yoshida
- Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan
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6
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Hirose K, Nishio K, Tanaka S, Léguillon R, Makii H, Nishinaka I, Orlandi R, Tsukada K, Smallcombe J, Vermeulen MJ, Chiba S, Aritomo Y, Ohtsuki T, Nakano K, Araki S, Watanabe Y, Tatsuzawa R, Takaki N, Tamura N, Goto S, Tsekhanovich I, Andreyev AN. Role of Multichance Fission in the Description of Fission-Fragment Mass Distributions at High Energies. Phys Rev Lett 2017; 119:222501. [PMID: 29286806 DOI: 10.1103/physrevlett.119.222501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Indexed: 06/07/2023]
Abstract
Fission-fragment mass distributions were measured for ^{237-240}U, ^{239-242}Np, and ^{241-244}Pu populated in the excitation-energy range from 10 to 60 MeV by multinucleon transfer channels in the reaction ^{18}O+^{238}U at the Japan Atomic Energy Agency tandem facility. Among them, the data for ^{240}U and ^{240,241,242}Np were observed for the first time. It was found that the mass distributions for all the studied nuclides maintain a double-humped shape up to the highest measured energy in contrast to expectations of predominantly symmetric fission due to the washing out of nuclear shell effects. From a comparison with the dynamical calculation based on the fluctuation-dissipation model, this behavior of the mass distributions was unambiguously attributed to the effect of multichance fission.
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Affiliation(s)
- K Hirose
- Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata Shirane, Tokai, Ibaraki 319-1195 Japan
| | - K Nishio
- Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata Shirane, Tokai, Ibaraki 319-1195 Japan
| | - S Tanaka
- Faculty of Science and Engineering, Kindai University, Higashi-Osaka 577-8502, Japan
| | - R Léguillon
- Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata Shirane, Tokai, Ibaraki 319-1195 Japan
| | - H Makii
- Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata Shirane, Tokai, Ibaraki 319-1195 Japan
| | - I Nishinaka
- Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata Shirane, Tokai, Ibaraki 319-1195 Japan
| | - R Orlandi
- Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata Shirane, Tokai, Ibaraki 319-1195 Japan
| | - K Tsukada
- Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata Shirane, Tokai, Ibaraki 319-1195 Japan
| | - J Smallcombe
- Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata Shirane, Tokai, Ibaraki 319-1195 Japan
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - M J Vermeulen
- Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata Shirane, Tokai, Ibaraki 319-1195 Japan
| | - S Chiba
- Laboratory for Advanced Nuclear Energy, Institute for Innovative Research, Tokyo Institute of Technology, 2-12-1-N1-19, Ookayama, Meguro-ku, Tokyo 152-8550 Japan
| | - Y Aritomo
- Faculty of Science and Engineering, Kindai University, Higashi-Osaka 577-8502, Japan
| | - T Ohtsuki
- Research Reactor Institute, Kyoto University, Kumatori, Osaka 590-0494, Japan
| | - K Nakano
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka 816-8580, Japan
| | - S Araki
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka 816-8580, Japan
| | - Y Watanabe
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka 816-8580, Japan
| | - R Tatsuzawa
- Graduate School of Engineering, Tokyo City University, Tokyo 158-8557, Japan
| | - N Takaki
- Graduate School of Engineering, Tokyo City University, Tokyo 158-8557, Japan
| | - N Tamura
- Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
| | - S Goto
- Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
| | - I Tsekhanovich
- University of Bordeaux, 351 Cours de la Libration, 33405 Talence Cedex, France
| | - A N Andreyev
- Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata Shirane, Tokai, Ibaraki 319-1195 Japan
- Department of Physics, University of York, York YO10 5DD, United Kingdom
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7
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Tsukada K, Enokizono A, Ohnishi T, Adachi K, Fujita T, Hara M, Hori M, Hori T, Ichikawa S, Kurita K, Matsuda K, Suda T, Tamae T, Togasaki M, Wakasugi M, Watanabe M, Yamada K. First Elastic Electron Scattering from ^{132}Xe at the SCRIT Facility. Phys Rev Lett 2017; 118:262501. [PMID: 28707914 DOI: 10.1103/physrevlett.118.262501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Indexed: 06/07/2023]
Abstract
The first elastic electron scattering has been successfully performed at the self-confining radioactive-isotope ion target (SCRIT) facility, the world's first electron scattering facility for SCRIT technique achieved high luminosity (over 10^{27} cm^{-2} s^{-1}, sufficient for determining the nuclear shape) with only 10^{8} target ions. While ^{132}Xe used in this time as a target is a stable isotope, the charge density distribution was first extracted from the momentum transfer distributions of the scattered electrons by comparing the results with those calculated by a phase shift calculation.
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Affiliation(s)
- K Tsukada
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - A Enokizono
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan
| | - T Ohnishi
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - K Adachi
- Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan
| | - T Fujita
- Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan
| | - M Hara
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - M Hori
- Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan
| | - T Hori
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - S Ichikawa
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - K Kurita
- Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan
| | - K Matsuda
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
| | - T Suda
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - T Tamae
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - M Togasaki
- Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan
| | - M Wakasugi
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - M Watanabe
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - K Yamada
- Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan
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8
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Ido T, Shimizu A, Nishiura M, Kato S, Nakano H, Ohshima S, Yokoyama M, Murakami S, Wakasa A, Nakamura S, Yokota M, Tsukada K, Ogawa H, Inoue T. Development of 6-MeV Heavy Ion Beam Probe on LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10829] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Ido
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Shimizu
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Nishiura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Kato
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Nakano
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Ohshima
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Yokoyama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department Nuclear Engineering, Kyoto 606-8501, Japan
| | - A. Wakasa
- Kyoto University, Department Nuclear Engineering, Kyoto 606-8501, Japan
| | - S. Nakamura
- Nagoya University, Nogoya, Aichi 464-8601, Japan
| | - M. Yokota
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Tsukada
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Ogawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Inoue
- National Institute for Fusion Science, Toki 509-5292, Japan
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9
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Eichler R, Asai M, Brand H, Chiera N, Di Nitto A, Dressler R, Düllmann C, Even J, Fangli F, Goetz M, Haba H, Hartmann W, Jäger E, Kaji D, Kanaya J, Kaneya Y, Khuyagbaatar J, Kindler B, Komori Y, Kraus B, Kratz J, Krier J, Kudou Y, Kurz N, Miyashita S, Morimoto K, Morita K, Murakami M, Nagame Y, Ooe K, Piguet D, Sato N, Sato T, Steiner J, Steinegger P, Sumita T, Takeyama M, Tanaka K, Tomitsuka T, Toyoshima A, Tsukada K, Türler A, Usoltsev I, Wakabayashi Y, Wang Y, Wiehl N, Wittwer Y, Yakushev A, Yamaki S, Yano S, Yamaki S, Qin Z. Complex chemistry with complex compounds. EPJ Web Conf 2016. [DOI: 10.1051/epjconf/201613107005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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10
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Sekine S, Nagata T, Okumura T, Shibuya K, Hashimoto I, Hojo S, Yoshioka I, Matsui K, Tsukada K. MON-P080: The Usefulness of Nutritional Index Conut for Risk Assessmentand Prognosis after Pancreaticoduodenectomy. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30714-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Takae S, Tsukada K, Okamoto N, Sato Y, Kawahara T, Suzuki N. Verification of accuracy & safety for ovarian reserve assessment with optical coherence tomography using mouse ovary. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Achenbach P, Schulz F, Aulenbacher S, Beričič J, Bleser S, Böhm R, Bosnar D, Correa L, Distler MO, Esser A, Fonvieille H, Friščić I, Fujii Y, Fujita M, Gogami T, Kanda H, Kaneta M, Kegel S, Kohl Y, Kusaka W, Margaryan A, Merkel H, Mihovilovič M, Müller U, Nagao S, Nakamura SN, Pochodzalla J, Lorente AS, Schlimme BS, Schoth M, Sfienti C, Širca S, Steinen M, Takahashi Y, Tang L, Thiel M, Tsukada K, Tyukin A, Weber A. Experimental investigations of the hypernucleus Λ4H. EPJ Web of Conferences 2016. [DOI: 10.1051/epjconf/201611307001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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Tsukada K, Harayama Y. DNA extraction with silica membrane column from teeth left in soil for more than 60 years. Forensic Science International: Genetics Supplement Series 2015. [DOI: 10.1016/j.fsigss.2015.09.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Okumura T, Shimada Y, Sakurai T, Hori R, Nagata T, Sakai Y, Tsukada K. Abnormal cell proliferation in the p75NTR-positive basal cell compartment of the esophageal epithelium during squamous carcinogenesis. Dis Esophagus 2015; 28:634-43. [PMID: 24888722 DOI: 10.1111/dote.12245] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The low affinity neurotrophin receptor p75NTR is known to be expressed in the mitotically quiescent basal layer (BL) of the normal esophageal epithelium. The aim of the present study was to detect oncogenic changes in the p75NTR-positive BL during esophageal squamous carcinogenesis. The normal epithelium (NE), low-grade intraepithelial neoplasia (LGN), high-grade intraepithelial neoplasia (HGN), and esophageal squamous carcinoma (SCC), in which invasion was limited to the muscularis mucosa, were obtained from surgically removed esophagi. The expression of p75NTR, the proliferation marker ki67, hTERT, p53, and p63 was examined immunohistochemically. The expression of p75NTR was detected in these tissues with average staining indexes (number of stained cells/100 nucleated cells; SI) of 1.00, 0.99, 0.81, and 0.73, respectively. The expression of ki67 in the BL significantly increased with the progression from LGN to HGN. The expression of hTERT and p53 significantly increased with the progression from NE to LGN, and then increased in a stepwise manner in HGN and SCC, with SI (hTERT/p53) of 0.10/0.11, 0.32/0.45, 0.50/0.72, and 0.65/0.61, respectively. The expression of p63 showed no significant difference among NE, LGN, HGN, and SCC, with SI of 0.82, 0.77, 0.85, and 0.87, respectively. A correlation was observed between the expression of ki67 and p53 (P = 0.005), while a negative correlation was found between p75NTR and hTERT (P = 0.01). Our results demonstrated that phenotypic changes from quiescent to active proliferation in the p75NTR-positive BL occurred during the progression from LGN to HGN. The altered expression of hTERT and p53 in the BL was detected in LGN, which suggested that additional oncogenic events that disrupt mitotic regulation in the p75NTR-positive quiescent BL may play a crucial role in malignant transformation. Further investigations using the isolation and tracing of p75NTR-positive cells in precancerous epithelia may provide us with a better understanding of squamous carcinogenesis.
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Affiliation(s)
- T Okumura
- Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Y Shimada
- Department of Nanobio Drug Discovery, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - T Sakurai
- Department of Clinical Pathology, Kyoto University Hospital, Kyoto, Japan
| | - R Hori
- Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan.,Department of Pathology I, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - T Nagata
- Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Y Sakai
- Division of Gastrointestinal Surgery, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - K Tsukada
- Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
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15
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Tsuchiya Y, Kawai S, Tazawa K, Yamagishi H, Arai H, Manabe T, Sekine S, Okumura T, Nagata T, Tsukada K. 251. Is laparoscopy-assisted colectomy superior to open colectomy? Comparison of the long term postoperative course and prognosis. Eur J Surg Oncol 2014. [DOI: 10.1016/j.ejso.2014.08.243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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16
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Even J, Yakushev A, Düllmann CE, Haba H, Asai M, Sato TK, Brand H, Di Nitto A, Eichler R, Fan FL, Hartmann W, Huang M, Jäger E, Kaji D, Kanaya J, Kaneya Y, Khuyagbaatar J, Kindler B, Kratz JV, Krier J, Kudou Y, Kurz N, Lommel B, Miyashita S, Morimoto K, Morita K, Murakami M, Nagame Y, Nitsche H, Ooe K, Qin Z, Schädel M, Steiner J, Sumita T, Takeyama M, Tanaka K, Toyoshima A, Tsukada K, Türler A, Usoltsev I, Wakabayashi Y, Wang Y, Wiehl N, Yamaki S. Nuclear chemistry. Synthesis and detection of a seaborgium carbonyl complex. Science 2014; 345:1491-3. [PMID: 25237098 DOI: 10.1126/science.1255720] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Experimental investigations of transactinoide elements provide benchmark results for chemical theory and probe the predictive power of trends in the periodic table. So far, in gas-phase chemical reactions, simple inorganic compounds with the transactinoide in its highest oxidation state have been synthesized. Single-atom production rates, short half-lives, and harsh experimental conditions limited the number of experimentally accessible compounds. We applied a gas-phase carbonylation technique previously tested on short-lived molybdenum (Mo) and tungsten (W) isotopes to the preparation of a carbonyl complex of seaborgium, the 106th element. The volatile seaborgium complex showed the same volatility and reactivity with a silicon dioxide surface as those of the hexacarbonyl complexes of the lighter homologs Mo and W. Comparison of the product's adsorption enthalpy with theoretical predictions and data for the lighter congeners supported a Sg(CO)6 formulation.
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Affiliation(s)
- J Even
- Helmholtz-Institut Mainz, 55099 Mainz, Germany
| | - A Yakushev
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Ch E Düllmann
- Helmholtz-Institut Mainz, 55099 Mainz, Germany. GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany. Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany.
| | - H Haba
- RIKEN, Wako, Saitama 351-0198, Japan
| | - M Asai
- Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - T K Sato
- Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - H Brand
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - A Di Nitto
- Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - R Eichler
- Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland. Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - F L Fan
- Institute of Modern Physics, Chinese Academy of Sciences, 730000 Lanzhou, China
| | - W Hartmann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - M Huang
- RIKEN, Wako, Saitama 351-0198, Japan
| | - E Jäger
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - D Kaji
- RIKEN, Wako, Saitama 351-0198, Japan
| | - J Kanaya
- RIKEN, Wako, Saitama 351-0198, Japan
| | - Y Kaneya
- Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | | | - B Kindler
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - J V Kratz
- Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - J Krier
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Y Kudou
- RIKEN, Wako, Saitama 351-0198, Japan
| | - N Kurz
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - B Lommel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - S Miyashita
- Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan. Department of Chemistry, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | | | - K Morita
- RIKEN, Wako, Saitama 351-0198, Japan. Department of Physics, Kyushu University, Higashi-Ku, Fukuoka, 812-8581, Japan
| | - M Murakami
- RIKEN, Wako, Saitama 351-0198, Japan. Department of Chemistry, Niigata University, Niigata, Niigata 950-2181, Japan
| | - Y Nagame
- Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - H Nitsche
- Department of Chemistry, University of California, Berkeley, CA 94720-1460, USA. Lawrence Berkeley National Laboratory, Berkeley, CA 94720-8169, USA
| | - K Ooe
- Department of Chemistry, Niigata University, Niigata, Niigata 950-2181, Japan
| | - Z Qin
- Institute of Modern Physics, Chinese Academy of Sciences, 730000 Lanzhou, China
| | - M Schädel
- Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - J Steiner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - T Sumita
- RIKEN, Wako, Saitama 351-0198, Japan
| | | | - K Tanaka
- RIKEN, Wako, Saitama 351-0198, Japan
| | - A Toyoshima
- Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - K Tsukada
- Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - A Türler
- Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland. Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - I Usoltsev
- Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland. Paul Scherrer Institute, 5232 Villigen, Switzerland
| | | | - Y Wang
- Institute of Modern Physics, Chinese Academy of Sciences, 730000 Lanzhou, China
| | - N Wiehl
- Helmholtz-Institut Mainz, 55099 Mainz, Germany. Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - S Yamaki
- RIKEN, Wako, Saitama 351-0198, Japan. Department of Physics, Saitama University, Saitama 338-8570, Japan
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17
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Koike T, Suzuki Y, Genyu S, Kobayashi I, Komori H, Otsu H, Sakuma H, Sakuma K, Sarausad EM, Shimada K, Shinozuka T, Tamura H, Tsukada K, Ukai M, Yamamoto TO. Comprehensive data on ionising radiation from Fukushima Daiichi nuclear power plant in the town of Miharu, Fukushima Prefecture: The Misho Project. J Radiol Prot 2014; 34:675-698. [PMID: 25125455 DOI: 10.1088/0952-4746/34/3/675] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Data related to radioactivity released from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident on 15 March 2011 gathered by residents of Miharu, Fukushima Prefecture, and by Tohoku University are presented. These data sets consist of (1) the earliest radiation monitoring by a Geiger counter in the town, (2) ratios of radioactivity between (132)Te and (137)Cs for a wide area between Fukushima and Tokyo, (3) radiation measurement of soil samples collected from 18 school grounds, and (4) external radiation exposure of 1400 students using OSL badges. By combining and analysing these various data sets, a curve for the cumulative total external exposure as a function of time, with 16 : 00 h on 15 March 2011 being time zero, is obtained. The average cumulative external dosage is estimated to be 10 mSv (σ = 4.2 mSv) over 10 years. In addition, the initiative that the residents of Miharu took in response to the FDNPP accident, which became known as The Misho Project (MP), is documented; in particular, the time at which the municipality instructed the immediate ingestion of iodine tablets by those under the age of 40, 13 : 00 h on 15 March 2011, is assessed.
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Affiliation(s)
- T Koike
- Department of Physics, Tohoku University, Aoba, Sendai, 980-8578, Japan
| | - Y Suzuki
- Municipal government of Miharu, Miharu-machi, Tamura-gun, Fukushima, 963-7758, Japan
| | - S Genyu
- Fukujyuji-Temple, Miharu-machi, Tamura-gun, Fukushima, 963-7767, Japan
| | - I Kobayashi
- Nagase Landauer, Ltd, Suwa, Tsukuba, Ibaraki, 300-2686, Japan
| | - H Komori
- Nagase Landauer, Ltd, Suwa, Tsukuba, Ibaraki, 300-2686, Japan
| | - H Otsu
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - H Sakuma
- Miharu-machi, Tamura-gun, Fukushima, 963-7758, Japan
| | - K Sakuma
- Miharu-machi, Tamura-gun, Fukushima, 963-7758, Japan
| | - E M Sarausad
- Microsoft Corporation, Redmond, WA, USA
- Alacer Group LLC, Bellevue, WA, USA
| | - K Shimada
- Cyclotron Radioisotope Center, Tohoku University, Aoba, Sendai, 980-8578, Japan
| | - T Shinozuka
- Cyclotron Radioisotope Center, Tohoku University, Aoba, Sendai, 980-8578, Japan
| | - H Tamura
- Department of Physics, Tohoku University, Aoba, Sendai, 980-8578, Japan
| | - K Tsukada
- Department of Physics, Tohoku University, Aoba, Sendai, 980-8578, Japan
| | - M Ukai
- Department of Physics, Tohoku University, Aoba, Sendai, 980-8578, Japan
| | - T O Yamamoto
- Department of Physics, Tohoku University, Aoba, Sendai, 980-8578, Japan
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18
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Zhao YL, Nagame Y, Nishinaka I, Tsukada K, Sueki K, Nakahara H, Goto S, Tanikawa M. Shapes of Fragment Mass-Yield Distributions and Shapes of Scissioning Nuclei in Actinides. J NUCL SCI TECHNOL 2014. [DOI: 10.1080/00223131.2002.10875402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Y. L. Zhao
- Institute of High Energy Physics, Chinese Academy of Science, Beijing 100039, China
- Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
- Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Y. Nagame
- Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
| | - I. Nishinaka
- Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
| | - K. Tsukada
- Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
| | - K. Sueki
- Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - H. Nakahara
- Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - S. Goto
- Chemistry Department, Niigata University, Niigata, 950-21, Japan
| | - M. Tanikawa
- Department of Chemistry, University of Tokyo, Tokyo 113, Japan
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19
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Hashimoto T, Ajimura S, Beer G, Bhang H, Bragadireanu M, Buehler P, Busso L, Cargnelli M, Choi S, Curceanu C, Enomoto S, Faso D, Fujioka H, Fujiwara Y, Fukuda T, Guaraldo C, Hayano RS, Hiraiwa T, Iio M, Iliescu M, Inoue K, Ishiguro Y, Ishikawa T, Ishimoto S, Ishiwatari T, Itahashi K, Iwai M, Iwasaki M, Kato Y, Kawasaki S, Kienle P, Kou H, Ma Y, Marton J, Matsuda Y, Mizoi Y, Morra O, Nagae T, Noumi H, Ohnishi H, Okada S, Outa H, Piscicchia K, Poli Lener M, Romero Vida A, Sada Y, Sakaguchi A, Sakuma F, Sato M, Scordo A, Sekimoto M, Shi H, Sirghi D, Sirghi F, Suzuki K, Suzuki S, Suzuki T, Tanida K, Tatsuno H, Tokuda M, Tomono D, Toyoda A, Tsukada K, Vazquez Doce O, Widmann E, Wuenschek BK, Yamaga T, Yamazaki T, Yim H, Zhang Q, Zmeska J. A search for the K−ppbound state in the 3He( K−in-flight, n) reaction at J-PARC. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146609008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Sada Y, Ajimura S, Beer G, Bhang H, Bragadireanu M, Buehler P, Busso L, Cargnelli M, Choi S, Curceanu C, Enomoto S, Faso D, Fujioka H, Fujiwara Y, Fukuda T, Guaraldo C, Hashimoto T, Hayano RS, Hiraiwa T, Iio M, Iliescu M, Inoue K, Ishiguro Y, Ishikawa T, Ishimoto S, Ishiwatari T, Itahashi K, Iwai M, Iwasaki M, Kato Y, Kawasaki S, Kienle P, Kou H, Ma Y, Marton J, Matsuda Y, Mizoi Y, Morra O, Nagae T, Noumi H, Ohnishi H, Okada S, Outa H, Piscicchia K, Poli Lener M, Romero Vidal A, Sakaguchi A, Sakuma F, Sato M, Scordo A, Sekimoto M, Shi H, Sirghi D, Sirghi F, Suzuki K, Suzuki S, Suzuki T, Tanida K, Tatsuno H, Tokuda M, Tomono D, Toyoda A, Tsukada K, Vazquez Doce O, Widmann E, Weunschek BK, Yamaga T, Yamazaki T, Yim H, Zhang Q, Zmeskal J. Search for the K−ppbound state via the in-flight 3He( K−, n) reaction. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20148102016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Nagame Y, Nishinaka I, Tsukada K, Ichikawa S, Ikezoe H, Zhao YL, Oura Y, Sueki K, Nakahara H, Tanikawa M, Ohtsuki T, Takamiya K, Nakanishi K, Kudo H, Hamajima Y, Chung Y. Bimodal Nature of Low Energy Fission of Light Actinides. RADIOCHIM ACTA 2013. [DOI: 10.1524/ract.1997.78.special-issue.3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Y. Nagame
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319-11, Japan
| | - I. Nishinaka
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319-11, Japan
| | - K. Tsukada
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319-11, Japan
| | - S. Ichikawa
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319-11, Japan
| | - H. Ikezoe
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319-11, Japan
| | - Y. L. Zhao
- Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-03, Japan
| | - Y. Oura
- Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-03, Japan
| | - K. Sueki
- Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-03, Japan
| | - H. Nakahara
- Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-03, Japan
| | - M. Tanikawa
- Department of Chemistry, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
| | - T. Ohtsuki
- Laboratory of Nuclear Science, Tohoku University, Taihaku-ku, Sendai 982, Japan
| | - K. Takamiya
- Department of Chemistry, Osaka University, Toyonaka, Osaka 560, Japan
| | - K. Nakanishi
- Department of Chemistry, Osaka University, Toyonaka, Osaka 560, Japan
| | - H. Kudo
- Department of Chemistry, Niigata University, Niigata 950-21, Japan
| | - Y. Hamajima
- Department of Chemistry, Kanazawa University, Kanazawa 920-11, Japan
| | - Y.H. Chung
- Department of Chemistry,Hallym University,Chuncheon,Kangwon-Do 200-702,Korea
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22
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Sekine S, Shimada Y, Nagata T, Sawada S, Yoshioka I, Matsui K, Moriyama M, Omura T, Osawa S, Shibuya K, Hashimoto I, Watanabe T, Hojo S, Hori R, Okumura T, Yoshida T, Tsukada K. Role of aquaporin-5 in gallbladder carcinoma. Eur Surg Res 2013; 51:108-17. [PMID: 24217644 DOI: 10.1159/000355675] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Accepted: 09/17/2013] [Indexed: 01/04/2023]
Abstract
BACKGROUND/PURPOSE Aquaporins (AQPs) are important in controlling bile formation. However, the exact role in human gallbladder carcinogenesis has not yet been defined. METHODS AQP-5-expressing gallbladder carcinoma (GBC) cell lines (NOZ) were transfected with anti-AQP-5 small interfering RNA (siRNA). Growth, migration, invasion assay, and drug susceptibility tests were performed. Next, microRNA (miRNA) expression was analyzed by miRNA oligo chip (3D-Gene®). AQP-5 and AQP-5-related miRNA target gene expressions were also analyzed using tissue microarray (TMA) in 44 GBC samples. RESULTS Treatment with AQP-5 siRNA decreased cell proliferation, migration, and invasion. On the other hand, those cells increased IC50 of gemcitabine. By performing miRNA assays, miR-29b, -200a, and -21 were shown to be highly overexpressed in cells treated with AQP-5 siRNA NOZ. When focusing on miR-21, phosphatase and tensin homolog (PTEN) was found to be a target of miR-21. In the TMA, AQP-5/PTEN coexpression was significantly associated with the depth of invasion and MIB-1 index (p = 0.003, 0.010). Survival of patients with a high AQP-5/PTEN coexpression was longer than that of patients with a low coexpression (p = 0.003). CONCLUSIONS Our result suggested that miR-21 and PTEN may contribute to the role of AQP-5 in GBC. AQP-5 and PTEN cascades are favorable biomarkers of GBC.
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Affiliation(s)
- S Sekine
- Department of Surgery and Science, University of Toyama, Toyama, Japan
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23
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Honda H, Gatanaga H, Aoki T, Watanabe K, Yazaki H, Tanuma J, Tsukada K, Honda M, Teruya K, Kikuchi Y, Oka S. Raltegravir can be used safely in HIV-1-infected patients treated with warfarin. Int J STD AIDS 2013; 23:903-4. [PMID: 23258834 DOI: 10.1258/ijsa.2012.012085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Drug co-administration often affects the patient response to warfarin through various mechanisms. We describe here five HIV-1-infected patients on treatment with warfarin in whom the use of raltegravir was associated with a favourable outcome.
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Affiliation(s)
- H Honda
- AIDS Clinical Center, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku Tokyo 162-8655, Japan.
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24
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Kabuki S, Sonoda S, Hatsukawa Y, Kimura H, Asai M, Hashimoto K, Komura S, Kubo H, Matsuoka Y, Mizumoto T, Nagai Y, Nakamura S, Sato T, Sawano T, Takada A, Toyoshima A, Tsukada K, Kunieda E, Tanimori T. SU-C-144-01: Imaging Study of An Electron-Tracking Compton Camera for Nuclear Medicine. Med Phys 2013. [DOI: 10.1118/1.4813990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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25
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Nakamura SN, Matsumura A, Okayasu Y, Seva T, Rodriguez VM, Baturin P, Yuan L, Acha A, Ahmidouch A, Androic D, Asaturyan A, Asaturyan R, Baker OK, Benmokhtar F, Bosted P, Carlini R, Chen C, Christy M, Cole L, Danagoulian S, Daniel A, Dharmawardane V, Egiyan K, Elaasar M, Ent R, Fenker H, Fujii Y, Furic M, Gan L, Gaskell D, Gasparian A, Gibson EF, Gogami T, Gueye P, Han Y, Hashimoto O, Hiyama E, Honda D, Horn T, Hu B, Hungerford EV, Jayalath C, Jones M, Johnston K, Kalantarians N, Kanda H, Kaneta M, Kato F, Kato S, Kawama D, Keppel C, Lan KJ, Luo W, Mack D, Maeda K, Malace S, Margaryan A, Marikyan G, Markowitz P, Maruta T, Maruyama N, Miyoshi T, Mkrtchyan A, Mkrtchyan H, Nagao S, Navasardyan T, Niculescu G, Niculescu MI, Nomura H, Nonaka K, Ohtani A, Oyamada M, Perez N, Petkovic T, Randeniya S, Reinhold J, Roche J, Sato Y, Segbefia EK, Simicevic N, Smith G, Song Y, Sumihama M, Tadevosyan V, Takahashi T, Tang L, Tsukada K, Tvaskis V, Vulcan W, Wells S, Wood SA, Yan C, Zhamkochyan S. Observation of the (Λ)(7)He hypernucleus by the (e, e'K+) reaction. Phys Rev Lett 2013; 110:012502. [PMID: 23383783 DOI: 10.1103/physrevlett.110.012502] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Indexed: 06/01/2023]
Abstract
An experiment with a newly developed high-resolution kaon spectrometer and a scattered electron spectrometer with a novel configuration was performed in Hall C at Jefferson Lab. The ground state of a neutron-rich hypernucleus, (Λ)(7)He, was observed for the first time with the (e, e'K+) reaction with an energy resolution of ~0.6 MeV. This resolution is the best reported to date for hypernuclear reaction spectroscopy. The (Λ)(7)He binding energy supplies the last missing information of the A = 7, T = 1 hypernuclear isotriplet, providing a new input for the charge symmetry breaking effect of the ΛN potential.
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Affiliation(s)
- S N Nakamura
- Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
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26
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Hasegawa K, Minami Y, Inuzuka H, Oe S, Kato R, Tsukada K, Udagawa Y, Kuroda M. Female pseudohermaphroditism associated with maternal steroid cell tumor, not otherwise specified of the ovary: a case report and literature review. CLIN EXP OBSTET GYN 2013; 40:591-595. [PMID: 24597265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Maternal virilization in pregnancy with or without fetal female pseudohermaphroditism has several etiologies. Of these, pregnancy luteoma is the most common cause of maternal virilization during pregnancy, and approximately 20 cases have been reported in recent years. Moreover, four cases of pregnancy luteomas with female pseudohermaphroditism have been reported. However, the extremely rare steroid cell tumor, not otherwise specified (NOS), has been reported only once as a cause for maternal virilization. Herein, the authors report the first case of maternal virilization with female pseudohermaphroditism associated with steroid cell tumor-NOS along with the clinical course, pathological features, and a review of the literature.
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Affiliation(s)
- K Hasegawa
- Department of Obstetrics and Gynecology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan.
| | - Y Minami
- Department of Obstetrics and Gynecology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - H Inuzuka
- Department of Obstetrics and Gynecology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - S Oe
- Department of Obstetrics and Gynecology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - R Kato
- Department of Obstetrics and Gynecology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - K Tsukada
- Department of Obstetrics and Gynecology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Y Udagawa
- Department of Obstetrics and Gynecology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - M Kuroda
- Department of Pathology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
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27
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Tsukada K, Harayama Y, Itoga Y, Shimizu M, Kurasawa Y, Kasahara K. Comparison of DNA typing using AmpFlSTR Yfiler and PowerPlex Y System, for specimens subject to very long storage. Forensic Science International: Genetics Supplement Series 2013. [DOI: 10.1016/j.fsigss.2013.10.084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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28
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Imataka G, Ishii J, Tsukada K, Suzumura H, Arisaka O. Ring chromosome 8 with mosaic trisomy 8 syndrome in an infant. Genet Couns 2013; 24:441-444. [PMID: 24551990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
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29
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Imataka G, Noguchi M, Tsukada K, Takahashi T, Yamanouchi H, Arisaka O. Partial epilepsy and developmental delay in infant with ring chromosome 14. Genet Couns 2013; 24:81-83. [PMID: 23610869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Ring chromosome 14 (r14) is clinically characterized by early-onset epilepsy, mental retardation, delayed speech, microcephaly, extremely mild facial dysmorphisms and ophthalmologic abnormalities. We report a case presenting with partial seizures and delayed development in infancy in which r14 was diagnosed based on chromosomal analysis. The patient was a girl with a normal family and delivery history. Afebrile generalized convulsions developed at age 9 months, and phenobarbital was started, but was changed to zonisamide due to impaired liver function. Chromosome analysis led to a diagnosis of 46, XX, r(14) (p11.2q32.3). At age 5 years, while under treatment with zonisamide and clobazam, epilepsy was characterized by multiple daily episodes of complex partial seizures. Although there are no consistent brain MRI or electroencephalogram findings, experienced pediatric neurologists can make a diagnosis based on facial dysmorphisms. When refractory epilepsy is encountered in infancy with developmental delay of unknown cause, chromosome analysis should be performed.
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Affiliation(s)
- G Imataka
- Department of Pediatrics, Dokkyo Medical University School of Medicine, Tochigi, Japan.
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30
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Takenoshita S, Hashizume T, Asao T, Nakamura J, Tsukada K, Katoh R, Koitabashi H, Ogihara H, Shitara Y, Nagamachi Y. Influence of surgical insults for colorectal cancers on neuroendocrine and immune parameters. Oncol Rep 2012; 1:1029-33. [PMID: 21607487 DOI: 10.3892/or.1.5.1029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
In surgery for colorectal cancer, a tendency of immune suppression was noted as seen in surgery for other types of gastro-intestinal cancer. This tendency was also found in the biological response, and it was related to the operative procedures and insults for rectal cancer. The degree of immunosuppression was milder in patients who underwent procedures that preserve the natural sphincter than in those who underwent colostomy. It is important for surgeons to avoid postoperative immunosuppression in order to prevent recurrence and improve prognosis. Given similar degrees of operative insult and stage of cancer, an operative procedure which causes as little immunosuppression as possible should be selected.
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31
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Futatsukawa K, Beckford B, Bydžzovsky′ P, Fujibayashi T, Fujii Y, Hashimoto O, Han Y, Hirose K, Hosomi K, Iguchi A, Ishikawa T, Kanda H, Kaneta M, Kawama D, Kawasaki T, Kiyokawa S, Koike T, Konno O, Maeda K, Maruyama N, Miwa K, Miyagi Y, Nakamura S, Sasaki A, Shirotori K, Sotona M, Suzuki K, Tamae T, Tamura H, Terada N, Tsukada K, Yamazaki H. Kaon photoproduction on the deuteron at Sendai. EPJ Web of Conferences 2012. [DOI: 10.1051/epjconf/20122002005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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32
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Sfienti C, Achenbach P, Ayerbe Gayoso C, Böhm R, Bosnar D, Debenjak L, Denig A, Distler MO, Esser A, Fonvieille H, Friščic I, Fujii Y, Gogami T, Mar Gòmez R, Hashimoto H, Hirose S, Merkel H, Middleton DG, Molitor M, Müller U, Nungesser L, Nagao S, Nakamura SN, Pochodzalla J, Saito T, Sànchez Majos S, Sanchez Lorente A, Schlimme BS, Schoth M, Schulz F, Širca S, Tang L, Thiel M, Tsukada K, Walcher T. The frontiers of the virtual photons program at MAMI. EPJ Web of Conferences 2012. [DOI: 10.1051/epjconf/20123701015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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33
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Achenbach P, Ayerbe Gayoso C, Böhm R, Borodina O, Bosnar D, Bydžovský P, Debenjak L, Distler M, Esser A, Friščić I, Fujii Y, Gogami T, Gómez Rodríguez M, Hashimoto O, Hirose S, Kim E, Margaryan A, Merkel H, Müller U, Nagao S, Nakamura SN, Pochodzalla J, Rappold C, Reinhold J, Saito TR, Sanchez Lorente A, Schlimme BS, Schoth M, Schulz F, Sfienti C, Širca S, Tang L, Thiel M, Tsukada K. Unpolarized and polarized elementary kaon electroproduction cross sections measured at MAMI. EPJ Web of Conferences 2012. [DOI: 10.1051/epjconf/20123706004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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34
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Harayama Y, Oki T, Hayashi T, Tsukada K, Ota M, Asamura H. A comparative study on the techniques of SNPs analysis for degraded DNA samples. Forensic Science International: Genetics Supplement Series 2011. [DOI: 10.1016/j.fsigss.2011.08.090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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35
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Tsukada K, Harayama Y, Shimizu M, Kurasawa Y, Kasahara K. Fast PCR amplification of AmpFlSTR Yfiler. Forensic Science International: Genetics Supplement Series 2011. [DOI: 10.1016/j.fsigss.2011.08.095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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36
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Tsukada K, Harayama Y, Shimizu M, Kurasawa Y, Kasahara K. Influence of presumptive reagents on DNA typing. Forensic Science International: Genetics Supplement Series 2011. [DOI: 10.1016/j.fsigss.2011.09.049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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37
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Li ZJ, Toyoshima A, Asai M, Tsukada K, Sato TK, Sato N, Kikuchi T, Nagame Y, Schädel M, Pershina V, Liang XH, et al.. Sulfate complexation of element 104, Rf, in H2SO4/HNO3 mixed solution. RADIOCHIM ACTA 2011. [DOI: 10.1524/ract.2012.1898] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The cation-exchange behavior of 261Rf (T
1/2= 78 s) produced in the 248Cm(18O, 5n) reaction was studied on a “one-atom-at-a-time” scale in 0.15–0.69 M H2SO4/HNO3 mixed solutions ([H+]=1.0 M) using an automated ion-exchange separation apparatus coupled with the detection system for alpha-spectroscopy (AIDA). It was found that adsorption probabilities ( decrease with an increase of [HSO4
−], showing a successive formation of Rf sulfate complexes. Rf exhibits a weaker complex formation tendency compared to the lighter homologues Zr and Hf. This is in good agreement with theoretical predictions including relativistic effects.
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Affiliation(s)
- Z. J. Li
- Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki 319-1195, Japan
| | - A. Toyoshima
- Japan Atomic Energy Research Institute, Advanced Science Research Center, Tokai, Ibaraki 319-1195, Japan
| | - M. Asai
- Japan Atomic Energy Research Institute, Advanced Science Research Centre, Tokai, Ibaraki 319-1195, Japan
| | - K. Tsukada
- Japan Atomic Energy Agency, Advanced Science Research Centre, Tokai, Ibaraki 319-1195, Japan
| | - T. K. Sato
- Japan Atomic Energy Agency, Advanced Science Research Centre, Tokai, Ibaraki 319-1195, Japan
| | - N. Sato
- Japan Atomic Energy Agency, Advanced Science Research Centre, Tokai, Ibaraki 319-1195, Japan
| | - T. Kikuchi
- Japan Atomic Energy Agency, Advanced Science Research Centre, Tokai, Ibaraki 319-1195, Japan
| | | | - M. Schädel
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Deutschland
| | - Valeria Pershina
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Deutschland
| | - X. H. Liang
- China Institute of Atomic Energy, Beijing 275, Volksrepublik China
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38
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Watanabe K, Honda M, Watanabe T, Tsukada K, Teruya K, Kikuchi Y, Oka S, Gatanaga H. Emergence of raltegravir-resistant HIV-1 in the central nervous system. Int J STD AIDS 2011; 21:840-1. [PMID: 21297097 DOI: 10.1258/ijsa.2009.009283] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Integrase inhibitor-resistant HIV-1 was detected in the cerebrospinal fluid, but not in the plasma of a 42-year-old man with HIV encephalopathy treated with a raltegravir (RAL)-containing regimen. Raltegravir resistance may develop in the central nervous system when the virus is already multi-drug resistant because of different penetration into cerebrospinal fluid of individual antiretroviral agents.
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Affiliation(s)
- K Watanabe
- AIDS Clinical Center, National Center for Global Health and Medicine, Tokyo, Japan
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39
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Ito J, Oshima I, Nishio M, Sono T, Suzuki Y, Horiuchi K, Niekawa N, Ogawa M, Setoya Y, Hisanaga F, Kouda M, Tsukada K. The effect of Assertive Community Treatment in Japan. Acta Psychiatr Scand 2011; 123:398-401. [PMID: 21070193 DOI: 10.1111/j.1600-0447.2010.01636.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the effects of the Assertive Community Treatment (ACT) program in a Japanese mental health service setting. METHOD This study was a randomized controlled trial. ACT was the intervention condition (n = 59), and the usual hospital-based rehabilitation program was the control condition (n = 59). Outcome indicators include in-patient days, psychiatric symptoms, social functioning, quality of life, and client satisfaction. The follow-up period was 12 months after the intervention. RESULTS We found a significant reduction of in-patient days for the ACT group demonstrated by t-test (t = 2.33, P = 0.02). However, the results of ancova did not show significant differences for in-patient days between the two groups (F = 1.85, P = 0.18). The depression score for Brief Psychiatric Rating Scale for the ACT group was significantly lower than the control group at the 12-month follow-up assessment (F = 5.57, P = 0.03). According to the t-test, the ACT group had a higher client satisfaction than the control group (t = 2.08, P = 0.05). CONCLUSION We concluded that ACT had a positive influence, as evidenced by a reduction of in-patient days, lower depressive symptoms, and higher client satisfaction.
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Affiliation(s)
- J Ito
- Department of Psychiatric Rehabilitation, National Center of Neurology and Psychiatry, Tokyo, Japan.
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Kitamura K, Mimura H, Tsukada K, Nakayama T, Yamaguchi M, Tawada Y. A High Speed Contact-Type Image Sensor using Amorphous Silicon Alloy Pin Diodes. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-258-1115] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTA new A4-size contact-type image sensor with 8 elements per millimeter (1,728 elements) was developed by using amorphous silicon alloy pin photodiodes as the light receiving elements. The matrix switching method is employed for signal reading. This method can read the signals from all of the 1,728 photodiodes using a 54 (54-channel input) x 32 (32.channel output) matrix switching scheme. It is advantageous in that the required input and output external circuits can be simplified. To prevent signal crosstalk between the diodes in the matrix, amorphous silicon alloy pin diodes, which are made in the same process as the photodiodes for maintaining a low cost, are connected in series to each photodiode in reverse polarity as blocking diodes.To achieve superior signal-to-noise ratio and response at the same time, amorphous silicon alloy pin diodes are optimized to satisfy both a high photo-to-dark ratio and a high rectification ratio. The image sensor can operate at up to 2 MHz signal reading clock, maintaining a signal-to-noise ratio of over 24 dB under 0. 1–1x sec exposure.
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Sakata T, Narita M, Ohtani N, Mizoguchi N, Tohyama T, Misawa D, Yamada H, Tsukada K, Takeuchi T. A case of phlegmonous gastritis with multiple liver and splenic abscesses. Nihon Shokakibyo Gakkai Zasshi 2011; 108:50-58. [PMID: 21212594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A 63-year-old woman was admitted with high fever. Laboratory tests showed leukocytosis and elevated C-reactive protein (CRP) levels. Abdominal ultrasonography and computed tomography revealed multiple liver and splenic tumors. We diagnosed phlegmonous gastritis with multiple liver and splenic abscesses based on a discharge of pus from the gastric ulcer on biopsy obtained during esophagogastroduodenoscopy. She showed remission after spontaneous drainage and treatment with antibiotics. A search of the literature yielded no other cases of phlegmonous gastritis with multiple liver and splenic abscesses, and we therefore report this case.
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Ogata K, Kandori A, Miyashita T, Sekihara K, Tsukada K. A comparison of two-dimensional techniques for converting magnetocardiogram maps into effective current source distributions. Rev Sci Instrum 2011; 82:014302. [PMID: 21280846 DOI: 10.1063/1.3529440] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The aim of this study was to develop a method for converting the pseudo two-dimensional current given by a current-arrow map (CAM) into the physical current. The physical current distribution is obtained by the optimal solution in a least mean square sense with Tikhonov regularization (LMSTR). In the current dipole simulation, the current pattern differences (ΔJ) between the results of the CAM and the LMSTR with several regularization parameters (α = 10(-1)-10(-15)) are calculated. In magnetocardiographic (MCG) analysis, the depth (z(d)) of a reconstruction plane is chosen by using the coordinates of the sinus node, which is estimated from MCG signals at the early p-wave. The ΔJs at p-wave peaks, QRS-complex peaks, and T-wave peaks of MCG signals for healthy subjects are calculated. Furthermore, correlation coefficients and regression lines are also calculated from the current values of the CAM and the LMSTR during p-waves, QRS-complex, and T-waves of MCG signals. In the simulation, the ΔJs (α ≈ 10(-10)) had a minimal value. The ΔJs (α = 10(-10)) at p-wave peaks, QRS-complex peaks, and T-wave peaks of MCG signals for healthy subjects also had minimal value. The correlation coefficients of the current values given by the CAM and the LMSTR (α = 10(-10)) were greater than 0.9. Furthermore, slopes (y) of the regression lines are correlated with the depth (z(d)) (r = -0.93). Consequently, the CAM value can be transformed into the LMSTR current value by multiplying it by the slope (y) obtained from the depth (z(d)). In conclusion, the result given by the CAM can be converted into an effective physical current distribution by using the depth (z(d)).
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Affiliation(s)
- K Ogata
- Advanced Research Laboratory, Hitachi Ltd., Higashi-Koigakubo, Kokubunji, Tokyo, Japan.
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Bhang H, Ajimura S, Aoki K, Banu A, Fukuda T, Hashimoto O, Hwang J, Kameoka S, Kang B, Kim E, Kim J, Maruta T, Miura Y, Miyake Y, Nagae T, Nakamura M, Nakamura S, Noumi H, Okada S, Okayasu Y, Outa H, Park H, Saha P, Sato Y, Sekimoto M, Takahashi T, Tamura H, Tanida K, Toyoda A, Tshoo K, Tsukada K, Watanabe T, Yim H. The Contribution of the Three-Body Process in the Nonmesonic Weak Decay of the Λ12CHypernucleus. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100305013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Iio M, Bhang H, Cargnelli M, Choi S, Curceanu C, Doce O, Enomoto S, Fujioka H, Fujiwara Y, Guaraldo C, Hashimoto T, Hayano R, Hiraiwa T, Ishimoto S, Ishiwatari T, Itahashi K, Iwasaki M, Kou H, Kienle P, Marton J, Matsuda Y, Noumi H, Ohnishi H, Okada S, Outa H, Sakuma F, Sato M, Sekimoto M, Shi H, Sirghi D, Sirghi F, Suzuki T, Tanida K, Tatsuno H, Tokuda M, Tomono D, Toyoda A, Tsukada K, Vidal A, Widmann E, Wunschek B, Yamazaki T, Zmeskal J. Precision Spectroscopy of Kaonic Helium-3 Atoms X-rays at J-PARC. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100303017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ajimura S, Beer G, Bhang H, Bragadireanu M, Buehler P, Busso L, Cargnelli M, Choi S, Curceanu C, Enomoto S, Faso D, Fujioka H, Fujiwara Y, Fukuda T, Fukuda Y, Guaraldo C, Hashimoto T, Hayano R, Hiraiwa T, Iio M, Iliescu M, Inoue K, Ishikawa T, Ishimoto S, Ishiwatari T, Itahashi K, Iwai M, Iwasaki M, Kienle P, Kou H, Marton J, Matsuda Y, Mizoi Y, Morra O, Nagae T, Noumi H, Ohnishi H, Okada S, Outa H, Pietreanu D, Sada Y, Sakaguchi A, Sakuma F, Sato M, Sekimoto M, Sirghi D, Sirghi F, Suzuki K, Suzuki S, Suzuki T, Tatsuno H, Tokuda M, Tomono D, Toyoda A, Tsukada K, Widmann E, Yamazaki T, Yim H, Zmeskal J. A search for deeply-bound kaonic nuclear states at J-PARC. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100307015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kim M, Ajimura S, Aoki K, Banu A, Bhang H, Fukuda T, Hashimoto O, Hwang JI, Kameoka S, Kang BH, Kim E, Kim JH, Maruta T, Miura Y, Miyake Y, Nagae T, Nakamura M, Nakamura SN, Noumi H, Okada S, Okayasu Y, Outa H, Park H, Saha PK, Sato Y, Sekimoto M, Takahashi T, Tamura H, Tanida K, Toyoda A, Tshoo K, Tsukada K, Watanabe T, Yim HJ. Three-body nonmesonic weak decay of the (Lambda)12C hypernucleus. Phys Rev Lett 2009; 103:182502. [PMID: 19905801 DOI: 10.1103/physrevlett.103.182502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2009] [Indexed: 05/28/2023]
Abstract
We have measured the branching ratio of the three-body process in the nonmesonic weak decay of Lambda12C to be 0.29+/-0.13. This result was obtained by reproducing the nucleon and the nucleon pair yields introducing a measured final state interaction. At the same time, we have determined the absolute decay widths, Gamma(n) and Gamma(p), along with Gamma2N, whose relative ratio has been a long-standing puzzle. Including the three-body process, we have successfully reproduced the nucleon energy distribution, the coincidence two-nucleon angular correlation, and the momentum sum distribution simultaneously.
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Affiliation(s)
- M Kim
- Department of Physics and Astronomy, Seoul National University, Seoul, 151-747, Korea
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Abstract
Characteristics of nuclear deformation properties at scission of two fission modes, symmetric and asymmetric, are reviewed. Existence of two kinds of scission configurations associated with the symmetric and asymmetric fission modes is pointed out: elongated and compact configurations. Each symmetric and asymmetric scission property is discussed in terms of shape elongation evaluated from fragment total kinetic energy (TKE). Fragment deformation at scission is also discussed based on neutron multiplicity data. From the systematic study of the scission properties in a wide range of actinide fission, the bimodal fission observed in spontaneous fission (SF) of the heavy actinides is interpreted as the result of the presence of the two fission paths of the ordinary asymmetric mode and a strongly shell-influenced symmetric one. The correlation between the fragment shell structures and the asymmetric mass-yield curves is described.
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von Zweidorf A, Brüchle W, Bürger S, Hummrich H, Kratz JV, Kuczewski B, Langrock G, Rieth U, Schädel M, Trautmann N, Tsukada K, Wiehl N. Evidence for the formation of sodium hassate(VIII). RADIOCHIM ACTA 2009. [DOI: 10.1524/ract.92.12.855.55112] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
SummaryHassium, element 108, was produced in the fusion reaction between26Mg and248Cm. The hassium recoils were oxidizedin-situto a highly volatile oxide, presumably HsO4, and were transported in a mixture of He and O2to a deposition and detection system. The latter consisted of 16 silicon PIN-photodiodes facing a layer of NaOH, which served, in the presence of a certain partial pressure of water in the transport gas, as reactive surface for the deposition of the volatile tetroxides. Six correlated α-decay chains of Hs were detected in the first 5 detectors centred around detection position 3. In analogy to OsO4, which forms Na2[OsO4(OH)2], an osmate(VIII), with aqueous NaOH, HsO4presumably was deposited as Na2[HsO4(OH)2], a hassate(VIII).
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Haba H, Tsukada K, Asai M, Toyoshima A, Ishii Y, Toume H, Sato T, Nishinaka I, Ichikawa T, Ichikawa S, Nagame Y, Sato W, Matsuo K, Kitamoto Y, Tashiro Y, Shinohara A, Saito J, Ito M, Ikezawa T, Sakamaki M, Goto S, Kudo H, Kikunaga H, Arai M, Kamataki S, Yokoyama A, Akiyama K, Sueki K, Oura Y, Schädel M, Brüchle W, Kratz JV. Extraction behavior of rutherfordium into tributylphosphate from hydrochloric acid. RADIOCHIM ACTA 2009. [DOI: 10.1524/ract.2007.95.1.1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The extraction behavior of rutherfordium (Rf) into tributylphosphate (TBP) from hydrochloric acid (HCl) has been studied together with those of the lighter group-4 elements Zr and Hf. The extractability of261Rf,169Hf, and85Zr into TBP was investigated under identical conditions in 7.2–8.0 M HCl by on-line reversed-phase extraction chromatography. The percent extractions of Rf, Hf, and Zr into the TBP resin increase steeply with increasing HCl concentration, and the order of extraction is Zr > Hf ≈ Rf. By considering the order of chloride complexation among these elements, it is suggested that the stability of the TBP complex of Rf tetrachloride is lower than those of Zr and Hf.
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