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Cubiss JG, Andreyev AN, Barzakh AE, Van Duppen P, Hilaire S, Péru S, Goriely S, Al Monthery M, Althubiti NA, Andel B, Antalic S, Atanasov D, Blaum K, Cocolios TE, Day Goodacre T, de Roubin A, Farooq-Smith GJ, Fedorov DV, Fedosseev VN, Fink DA, Gaffney LP, Ghys L, Harding RD, Huyse M, Imai N, Joss DT, Kreim S, Lunney D, Lynch KM, Manea V, Marsh BA, Martinez Palenzuela Y, Molkanov PL, Neidherr D, O'Neill GG, Page RD, Prosnyak SD, Rosenbusch M, Rossel RE, Rothe S, Schweikhard L, Seliverstov MD, Sels S, Skripnikov LV, Stott A, Van Beveren C, Verstraelen E, Welker A, Wienholtz F, Wolf RN, Zuber K. Deformation versus Sphericity in the Ground States of the Lightest Gold Isotopes. Phys Rev Lett 2023; 131:202501. [PMID: 38039485 DOI: 10.1103/physrevlett.131.202501] [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: 03/27/2023] [Revised: 08/02/2023] [Accepted: 09/18/2023] [Indexed: 12/03/2023]
Abstract
The changes in mean-squared charge radii of neutron-deficient gold nuclei have been determined using the in-source, resonance-ionization laser spectroscopy technique, at the ISOLDE facility (CERN). From these new data, nuclear deformations are inferred, revealing a competition between deformed and spherical configurations. The isotopes ^{180,181,182}Au are observed to possess well-deformed ground states and, when moving to lighter masses, a sudden transition to near-spherical shapes is seen in the extremely neutron-deficient nuclides, ^{176,177,179}Au. A case of shape coexistence and shape staggering is identified in ^{178}Au which has a ground and isomeric state with different deformations. These new data reveal a pattern in ground-state deformation unique to the gold isotopes, whereby, when moving from the heavy to light masses, a plateau of well-deformed isotopes exists around the neutron midshell, flanked by near-spherical shapes in the heavier and lighter isotopes-a trend hitherto unseen elsewhere in the nuclear chart. The experimental charge radii are compared to those from Hartree-Fock-Bogoliubov calculations using the D1M Gogny interaction and configuration mixing between states of different deformation. The calculations are constrained by the known spins, parities, and magnetic moments of the ground states in gold nuclei and show a good agreement with the experimental results.
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Affiliation(s)
- J G Cubiss
- School of Physics, Engineering and Technology, University of York, York, YO10 5DD, United Kingdom
| | - A N Andreyev
- School of Physics, Engineering and Technology, University of York, York, YO10 5DD, United Kingdom
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency, Tokai-mura, Japan
| | - A E Barzakh
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - P Van Duppen
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
| | - S Hilaire
- Université Paris-Saclay, CEA, LMCE, 91680, Bruyères-le-Châtel, France
| | - S Péru
- Université Paris-Saclay, CEA, LMCE, 91680, Bruyères-le-Châtel, France
| | - S Goriely
- Institut d'Astronomie et d'Astrophysique, CP-226, Université Libre de Bruxelles, 1050 Brussels, Belgium
| | - M Al Monthery
- School of Physics, Engineering and Technology, University of York, York, YO10 5DD, United Kingdom
| | - N A Althubiti
- The University of Manchester, Department of Physics and Astronomy, Oxford Road, M13 9PL Manchester, United Kingdom
- Physics Department, College of Science, Jouf University, Sakakah, Kingdom of Saudi Arabia
| | - B Andel
- Department of Nuclear Physics and Biophysics, Comenius University in Bratislava, 84248 Bratislava, Slovakia
| | - S Antalic
- Department of Nuclear Physics and Biophysics, Comenius University in Bratislava, 84248 Bratislava, Slovakia
| | - D Atanasov
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- CERN, 1211, Geneva 23, Switzerland
| | - K Blaum
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - T E Cocolios
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
- The University of Manchester, Department of Physics and Astronomy, Oxford Road, M13 9PL Manchester, United Kingdom
| | - T Day Goodacre
- The University of Manchester, Department of Physics and Astronomy, Oxford Road, M13 9PL Manchester, United Kingdom
- CERN, 1211, Geneva 23, Switzerland
| | - A de Roubin
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - G J Farooq-Smith
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
- The University of Manchester, Department of Physics and Astronomy, Oxford Road, M13 9PL Manchester, United Kingdom
| | - D V Fedorov
- Affiliated with an institute covered by a cooperation agreement with CERN
| | | | - D A Fink
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- CERN, 1211, Geneva 23, Switzerland
| | - L P Gaffney
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
- CERN, 1211, Geneva 23, Switzerland
| | - L Ghys
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
| | - R D Harding
- School of Physics, Engineering and Technology, University of York, York, YO10 5DD, United Kingdom
- CERN, 1211, Geneva 23, Switzerland
| | - M Huyse
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
| | - N Imai
- Center for Nuclear Study (CNS), Graduate School of Science The University of Tokyo, Japan
| | - D T Joss
- Department of Physics, University of Liverpool, Liverpool, L69 7ZE, United Kingdom
| | - S Kreim
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- CERN, 1211, Geneva 23, Switzerland
| | - D Lunney
- CSNSM-CNRS, Université de Paris Sud, 91400 Orsay, France
| | - K M Lynch
- The University of Manchester, Department of Physics and Astronomy, Oxford Road, M13 9PL Manchester, United Kingdom
- CERN, 1211, Geneva 23, Switzerland
| | - V Manea
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | | | - Y Martinez Palenzuela
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
- CERN, 1211, Geneva 23, Switzerland
| | - P L Molkanov
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - D Neidherr
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt 64291, Germany
| | - G G O'Neill
- Department of Physics, University of Liverpool, Liverpool, L69 7ZE, United Kingdom
| | - R D Page
- Department of Physics, University of Liverpool, Liverpool, L69 7ZE, United Kingdom
| | - S D Prosnyak
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - M Rosenbusch
- Institut für Physik, Universität Greifswald, 17487 Greifswald, Germany
| | - R E Rossel
- CERN, 1211, Geneva 23, Switzerland
- Institut für Physik, Johannes Gutenberg-Universität Mainz, Mainz, D-55128, Germany
| | - S Rothe
- CERN, 1211, Geneva 23, Switzerland
- Institut für Physik, Johannes Gutenberg-Universität Mainz, Mainz, D-55128, Germany
| | - L Schweikhard
- Institut für Physik, Universität Greifswald, 17487 Greifswald, Germany
| | - M D Seliverstov
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - S Sels
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
| | - L V Skripnikov
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - A Stott
- School of Physics, Engineering and Technology, University of York, York, YO10 5DD, United Kingdom
| | - C Van Beveren
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
| | - E Verstraelen
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
| | - A Welker
- CERN, 1211, Geneva 23, Switzerland
- Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden 01069, Germany
| | - F Wienholtz
- CERN, 1211, Geneva 23, Switzerland
- Institut für Physik, Universität Greifswald, 17487 Greifswald, Germany
| | - R N Wolf
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- Institut für Physik, Universität Greifswald, 17487 Greifswald, Germany
| | - K Zuber
- Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden 01069, Germany
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Niwase T, Watanabe YX, Hirayama Y, Mukai M, Schury P, Andreyev AN, Hashimoto T, Iimura S, Ishiyama H, Ito Y, Jeong SC, Kaji D, Kimura S, Miyatake H, Morimoto K, Moon JY, Oyaizu M, Rosenbusch M, Taniguchi A, Wada M. Discovery of New Isotope ^{241}U and Systematic High-Precision Atomic Mass Measurements of Neutron-Rich Pa-Pu Nuclei Produced via Multinucleon Transfer Reactions. Phys Rev Lett 2023; 130:132502. [PMID: 37067317 DOI: 10.1103/physrevlett.130.132502] [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: 11/21/2022] [Revised: 01/26/2023] [Accepted: 02/16/2023] [Indexed: 06/19/2023]
Abstract
The new isotope ^{241}U was synthesized and systematic atomic mass measurements of nineteen neutron-rich Pa-Pu isotopes were performed in the multinucleon transfer reactions of the ^{238}U+^{198}Pt system at the KISS facility. The present experimental results demonstrate the crucial role of the multinucleon transfer reactions for accessing unexplored neutron-rich actinide isotopes toward the N=152 shell gap in this region of nuclides.
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Affiliation(s)
- T Niwase
- Wako Nuclear Science Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - Y X Watanabe
- Wako Nuclear Science Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - Y Hirayama
- Wako Nuclear Science Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - M Mukai
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - P Schury
- Wako Nuclear Science Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - A N Andreyev
- School of Physics, Engineering and Technology, University of York, York YO10 5DD, United Kingdom
| | - T Hashimoto
- Institute for Basic Science, 70, Yuseong-daero 1689-gil, Yusung-gu, Daejeon 43000, Korea
| | - S Iimura
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan
| | - H Ishiyama
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - Y Ito
- Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki 319-1195, Japan
| | - S C Jeong
- Wako Nuclear Science Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - D Kaji
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - S Kimura
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - H Miyatake
- Wako Nuclear Science Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - K Morimoto
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - J-Y Moon
- Institute for Basic Science, 70, Yuseong-daero 1689-gil, Yusung-gu, Daejeon 43000, Korea
| | - M Oyaizu
- Wako Nuclear Science Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - M Rosenbusch
- Wako Nuclear Science Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - A Taniguchi
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Osaka 590-0494, Japan
| | - M Wada
- Wako Nuclear Science Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
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3
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Iimura S, Rosenbusch M, Takamine A, Tsunoda Y, Wada M, Chen S, Hou DS, Xian W, Ishiyama H, Yan S, Schury P, Crawford H, Doornenbal P, Hirayama Y, Ito Y, Kimura S, Koiwai T, Kojima TM, Koura H, Lee J, Liu J, Michimasa S, Miyatake H, Moon JY, Naimi S, Nishimura S, Niwase T, Odahara A, Otsuka T, Paschalis S, Petri M, Shimizu N, Sonoda T, Suzuki D, Watanabe YX, Wimmer K, Wollnik H. Study of the N=32 and N=34 Shell Gap for Ti and V by the First High-Precision Multireflection Time-of-Flight Mass Measurements at BigRIPS-SLOWRI. Phys Rev Lett 2023; 130:012501. [PMID: 36669221 DOI: 10.1103/physrevlett.130.012501] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
The atomic masses of ^{55}Sc, ^{56,58}Ti, and ^{56-59}V have been determined using the high-precision multireflection time-of-flight technique. The radioisotopes have been produced at RIKEN's Radioactive Isotope Beam Factory (RIBF) and delivered to the novel designed gas cell and multireflection system, which has been recently commissioned downstream of the ZeroDegree spectrometer following the BigRIPS separator. For ^{56,58}Ti and ^{56-59}V, the mass uncertainties have been reduced down to the order of 10 keV, shedding new light on the N=34 shell effect in Ti and V isotopes by the first high-precision mass measurements of the critical species ^{58}Ti and ^{59}V. With the new precision achieved, we reveal the nonexistence of the N=34 empirical two-neutron shell gaps for Ti and V, and the enhanced energy gap above the occupied νp_{3/2} orbit is identified as a feature unique to Ca. We perform new Monte Carlo shell model calculations including the νd_{5/2} and νg_{9/2} orbits and compare the results with conventional shell model calculations, which exclude the νg_{9/2} and the νd_{5/2} orbits. The comparison indicates that the shell gap reduction in Ti is related to a partial occupation of the higher orbitals for the outer two valence neutrons at N=34.
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Affiliation(s)
- S Iimura
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- Department of Physics, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- Department of Physics, College of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Tokyo 171-8501, Japan
| | - M Rosenbusch
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - A Takamine
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - Y Tsunoda
- Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
| | - M Wada
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - S Chen
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - D S Hou
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - W Xian
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - H Ishiyama
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - S Yan
- Institute of Mass Spectrometry and Atmospheric Environment, Jinan University, Guangzhou 510632, China
| | - P Schury
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - H Crawford
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94523, USA
| | - P Doornenbal
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - Y Hirayama
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - Y Ito
- Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki 319-1195, Japan
| | - S Kimura
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - T Koiwai
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - T M Kojima
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - H Koura
- Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki 319-1195, Japan
| | - J Lee
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - J Liu
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong, China
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - S Michimasa
- Center of Nuclear Study (CNS), The University of Tokyo, Bunkyo 113-0033, Japan
| | - H Miyatake
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - J Y Moon
- Institute for Basic Science, 70, Yuseong-daero 1689-gil, Yusung-gu, Daejeon 305-811, Korea
| | - S Naimi
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - S Nishimura
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - T Niwase
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - A Odahara
- Department of Physics, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - T Otsuka
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki 319-1195, Japan
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - S Paschalis
- School of Physics, Engineering, and Technology, University of York, York YO10 5DD, United Kingdom
| | - M Petri
- School of Physics, Engineering, and Technology, University of York, York YO10 5DD, United Kingdom
| | - N Shimizu
- Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
| | - T Sonoda
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - D Suzuki
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - Y X Watanabe
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - K Wimmer
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - H Wollnik
- New Mexico State University, Las Cruces, New Mexico 88001, USA
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4
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Day Goodacre T, Afanasjev AV, Barzakh AE, Marsh BA, Sels S, Ring P, Nakada H, Andreyev AN, Van Duppen P, Althubiti NA, Andel B, Atanasov D, Billowes J, Blaum K, Cocolios TE, Cubiss JG, Farooq-Smith GJ, Fedorov DV, Fedosseev VN, Flanagan KT, Gaffney LP, Ghys L, Huyse M, Kreim S, Lunney D, Lynch KM, Manea V, Martinez Palenzuela Y, Molkanov PL, Rosenbusch M, Rossel RE, Rothe S, Schweikhard L, Seliverstov MD, Spagnoletti P, Van Beveren C, Veinhard M, Verstraelen E, Welker A, Wendt K, Wienholtz F, Wolf RN, Zadvornaya A, Zuber K. Laser Spectroscopy of Neutron-Rich ^{207,208}Hg Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the N=126 Shell Closure. Phys Rev Lett 2021; 126:032502. [PMID: 33543945 DOI: 10.1103/physrevlett.126.032502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 11/17/2020] [Accepted: 12/15/2020] [Indexed: 06/12/2023]
Abstract
The mean-square charge radii of ^{207,208}Hg (Z=80, N=127, 128) have been studied for the first time and those of ^{202,203,206}Hg (N=122, 123, 126) remeasured by the application of in-source resonance-ionization laser spectroscopy at ISOLDE (CERN). The characteristic kink in the charge radii at the N=126 neutron shell closure has been revealed, providing the first information on its behavior below the Z=82 proton shell closure. A theoretical analysis has been performed within relativistic Hartree-Bogoliubov and nonrelativistic Hartree-Fock-Bogoliubov approaches, considering both the new mercury results and existing lead data. Contrary to previous interpretations, it is demonstrated that both the kink at N=126 and the odd-even staggering (OES) in its vicinity can be described predominately at the mean-field level and that pairing does not need to play a crucial role in their origin. A new OES mechanism is suggested, related to the staggering in the occupation of the different neutron orbitals in odd- and even-A nuclei, facilitated by particle-vibration coupling for odd-A nuclei.
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Affiliation(s)
- T Day Goodacre
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
- CERN, CH-1211 Geneva 23, Switzerland
- TRIUMF, Vancouver V6T 2A3, Canada
| | - A V Afanasjev
- Department of Physics and Astronomy, Mississippi State University, Mississippi 39762, USA
| | - A E Barzakh
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina 188300, Russia
| | - B A Marsh
- CERN, CH-1211 Geneva 23, Switzerland
| | - S Sels
- CERN, CH-1211 Geneva 23, Switzerland
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - P Ring
- Fakultät für Physik, Technische Universität München, D-85748 Garching, Germany
| | - H Nakada
- Department of Physics, Graduate School of Science, Chiba University, Yayoi-cho, I-33, Inage, Chiba 263-8522, Japan
| | - A N Andreyev
- Department of Physics, University of York, York YO10 5DD, United Kingdom
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Japan
| | - P Van Duppen
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - N A Althubiti
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
- Physics Department, Faculty of Science, Jouf University, Aljouf P.O. Box 2014, Saudi Arabia
| | - B Andel
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
- Department of Nuclear Physics and Biophysics, Comenius University in Bratislava, 84248 Bratislava, Slovakia
| | - D Atanasov
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - J Billowes
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
| | - K Blaum
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - T E Cocolios
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - J G Cubiss
- Department of Physics, University of York, York YO10 5DD, United Kingdom
| | - G J Farooq-Smith
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - D V Fedorov
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina 188300, Russia
| | | | - K T Flanagan
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
- The Photon Science Institute, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - L P Gaffney
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
| | - L Ghys
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
- Belgian Nuclear Research Center SCK CEN, Boeretang 200, B-2400 Mol, Belgium
| | - M Huyse
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - S Kreim
- CERN, CH-1211 Geneva 23, Switzerland
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - D Lunney
- CSNSM-IN2P3, Université de Paris Sud, 91405 Orsay, France
| | - K M Lynch
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
- CERN, CH-1211 Geneva 23, Switzerland
| | - V Manea
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Y Martinez Palenzuela
- CERN, CH-1211 Geneva 23, Switzerland
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - P L Molkanov
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina 188300, Russia
| | - M Rosenbusch
- Universität Greifswald, Institut für Physik, 17487 Greifswald, Germany
| | - R E Rossel
- CERN, CH-1211 Geneva 23, Switzerland
- Institut für Physik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany
| | - S Rothe
- CERN, CH-1211 Geneva 23, Switzerland
| | - L Schweikhard
- Universität Greifswald, Institut für Physik, 17487 Greifswald, Germany
| | - M D Seliverstov
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina 188300, Russia
| | - P Spagnoletti
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
| | - C Van Beveren
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | | | - E Verstraelen
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - A Welker
- CERN, CH-1211 Geneva 23, Switzerland
- Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden 01069, Germany
| | - K Wendt
- Institut für Physik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany
| | - F Wienholtz
- CERN, CH-1211 Geneva 23, Switzerland
- Universität Greifswald, Institut für Physik, 17487 Greifswald, Germany
| | - R N Wolf
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- Universität Greifswald, Institut für Physik, 17487 Greifswald, Germany
| | - A Zadvornaya
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - K Zuber
- Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden 01069, Germany
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5
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Walker PM, Hirayama Y, Lane GJ, Watanabe H, Dracoulis GD, Ahmed M, Brunet M, Hashimoto T, Ishizawa S, Kondev FG, Litvinov YA, Miyatake H, Moon JY, Mukai M, Niwase T, Park JH, Podolyák Z, Rosenbusch M, Schury P, Wada M, Watanabe XY, Liang WY, Xu FR. Properties of ^{187}Ta Revealed through Isomeric Decay. Phys Rev Lett 2020; 125:192505. [PMID: 33216598 DOI: 10.1103/physrevlett.125.192505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 10/13/2020] [Indexed: 06/11/2023]
Abstract
Mass-separated ^{187}Ta_{114} in a high-spin isomeric state has been produced for the first time by multinucleon transfer reactions, employing an argon gas-stopping cell and laser ionization. Internal γ rays revealed a T_{1/2}=7.3±0.9 s isomer at 1778±1 keV, which decays through a rotational band with perturbations associated with the approach to a prolate-oblate shape transition. Model calculations show less influence from triaxiality compared to heavier elements in the same mass region. The isomer-decay reduced E2 hindrance factor f_{ν}=27±1 supports the interpretation that axial symmetry is approximately conserved.
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Affiliation(s)
- P M Walker
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - Y Hirayama
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - G J Lane
- Department of Nuclear Physics, RSPhys, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - H Watanabe
- School of Physics, and International Research Center for Nuclei and Particles in Cosmos, Beihang University, Beijing 100191, China
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
| | - G D Dracoulis
- Department of Nuclear Physics, RSPhys, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - M Ahmed
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- University of Tsukuba, Tsukuba, Ibaraki 305-0006, Japan
| | - M Brunet
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - T Hashimoto
- Rare Isotope Science Project, Institute for Basic Science (IBS), Daejeon 305-811, Republic of Korea
| | - S Ishizawa
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
- Graduate School of Science and Engineering, Yamagata University, Yamagata 992-8510, Japan
| | - F G Kondev
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - H Miyatake
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - J Y Moon
- Rare Isotope Science Project, Institute for Basic Science (IBS), Daejeon 305-811, Republic of Korea
| | - M Mukai
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
- University of Tsukuba, Tsukuba, Ibaraki 305-0006, Japan
| | - T Niwase
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
- Department of Physics, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - J H Park
- Rare Isotope Science Project, Institute for Basic Science (IBS), Daejeon 305-811, Republic of Korea
| | - Zs Podolyák
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - M Rosenbusch
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - P Schury
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - M Wada
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- University of Tsukuba, Tsukuba, Ibaraki 305-0006, Japan
| | - X Y Watanabe
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - W Y Liang
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - F R Xu
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
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6
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Schury P, Wada M, Wollnik H, Moon JY, Hashimoto T, Rosenbusch M. High-stability, high-voltage power supplies for use with multi-reflection time-of-flight mass spectrographs. Rev Sci Instrum 2020; 91:014702. [PMID: 32012634 DOI: 10.1063/1.5104292] [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: 04/28/2019] [Accepted: 12/10/2019] [Indexed: 06/10/2023]
Abstract
Achieving the highest possible mass resolving power in a multireflection time-of-flight mass spectrometer requires very high-stability power supplies. To this end, we have developed a programmable high-voltage power supply that can achieve long-term stability in the order of parts-per-million. Herein, we present the design of a stable high-voltage system and bench-top stability measurements up to 1 kV; a stabilization technique can, in principle, be applied up to 15 kV or more. We demonstrate that in the ≤1 Hz band, the output stability is at the level of 1 part per million (ppm) for 1 h, with only slightly more output variation across 3 days. We further demonstrate that the output is largely free of noise in the 1 Hz-200 Hz band. We also demonstrate settling to the ppm level within 1 min following a 100 V step transition. Finally, we demonstrate that when these power supplies are used to bias the electrodes of a multireflection time-of-flight mass spectrograph, the measured time-of-flight is stable at the ppm-level for at least 1 h.
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Affiliation(s)
- P Schury
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Ibaraki 305-0801, Japan
| | - M Wada
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Ibaraki 305-0801, Japan
| | - H Wollnik
- New Mexico State University, Las Cruces, New Mexico 88001, USA
| | - J-Y Moon
- Institute for Basic Science, Daejeon 34126, South Korea
| | - T Hashimoto
- Institute for Basic Science, Daejeon 34126, South Korea
| | - M Rosenbusch
- RIKEN Nishina Center for Accelerator-Based Science, Saitama 351-0198, Japan
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7
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Mougeot M, Atanasov D, Blaum K, Chrysalidis K, Goodacre TD, Fedorov D, Fedosseev V, George S, Herfurth F, Holt JD, Lunney D, Manea V, Marsh B, Neidherr D, Rosenbusch M, Rothe S, Schweikhard L, Schwenk A, Seiffert C, Simonis J, Stroberg SR, Welker A, Wienholtz F, Wolf RN, Zuber K. Precision Mass Measurements of ^{58-63}Cr: Nuclear Collectivity Towards the N=40 Island of Inversion. Phys Rev Lett 2018; 120:232501. [PMID: 29932682 DOI: 10.1103/physrevlett.120.232501] [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: 11/22/2017] [Revised: 03/06/2018] [Indexed: 06/08/2023]
Abstract
The neutron-rich isotopes ^{58-63}Cr were produced for the first time at the ISOLDE facility and their masses were measured with the ISOLTRAP spectrometer. The new values are up to 300 times more precise than those in the literature and indicate significantly different nuclear structure from the new mass-surface trend. A gradual onset of deformation is found in this proton and neutron midshell region, which is a gateway to the second island of inversion around N=40. In addition to comparisons with density-functional theory and large-scale shell-model calculations, we present predictions from the valence-space formulation of the ab initio in-medium similarity renormalization group, the first such results for open-shell chromium isotopes.
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Affiliation(s)
- M Mougeot
- CSNSM-IN2P3-CNRS, Université Paris-Sud, Orsay 91405, France
| | - D Atanasov
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, Heidelberg 69117, Germany
| | - K Blaum
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, Heidelberg 69117, Germany
| | - K Chrysalidis
- CERN, Geneva 1211, Switzerland
- Institut für Physik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany
| | - T Day Goodacre
- CERN, Geneva 1211, Switzerland
- School of Physics Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - D Fedorov
- Petersburg Nuclear Physics Institute, Gatchina 188300, Russia
| | | | - S George
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, Heidelberg 69117, Germany
| | - F Herfurth
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt 64291, Germany
| | - J D Holt
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - D Lunney
- CSNSM-IN2P3-CNRS, Université Paris-Sud, Orsay 91405, France
| | - V Manea
- CERN, Geneva 1211, Switzerland
| | - B Marsh
- CERN, Geneva 1211, Switzerland
| | - D Neidherr
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt 64291, Germany
| | - M Rosenbusch
- Universität Greifswald, Institut für Physik, Greifswald 17487, Germany
| | - S Rothe
- CERN, Geneva 1211, Switzerland
| | - L Schweikhard
- Universität Greifswald, Institut für Physik, Greifswald 17487, Germany
| | - A Schwenk
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, Heidelberg 69117, Germany
- Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt 64289, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt 64291, Germany
| | | | - J Simonis
- Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt 64289, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt 64291, Germany
- Institut für Kernphysik and PRISMA Cluster of Excellence, Johannes Gutenberg-Universität, Mainz 55099, Germany
| | - S R Stroberg
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - A Welker
- Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden 01069, Germany
| | - F Wienholtz
- Universität Greifswald, Institut für Physik, Greifswald 17487, Germany
| | - R N Wolf
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, Heidelberg 69117, Germany
| | - K Zuber
- Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden 01069, Germany
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8
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Ito Y, Schury P, Wada M, Arai F, Haba H, Hirayama Y, Ishizawa S, Kaji D, Kimura S, Koura H, MacCormick M, Miyatake H, Moon JY, Morimoto K, Morita K, Mukai M, Murray I, Niwase T, Okada K, Ozawa A, Rosenbusch M, Takamine A, Tanaka T, Watanabe YX, Wollnik H, Yamaki S. First Direct Mass Measurements of Nuclides around Z=100 with a Multireflection Time-of-Flight Mass Spectrograph. Phys Rev Lett 2018; 120:152501. [PMID: 29756864 DOI: 10.1103/physrevlett.120.152501] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 02/05/2018] [Indexed: 06/08/2023]
Abstract
The masses of ^{246}Es, ^{251}Fm, and the transfermium nuclei ^{249-252}Md and ^{254}No, produced by hot- and cold-fusion reactions, in the vicinity of the deformed N=152 neutron shell closure, have been directly measured using a multireflection time-of-flight mass spectrograph. The masses of ^{246}Es and ^{249,250,252}Md were measured for the first time. Using the masses of ^{249,250}Md as anchor points for α decay chains, the masses of heavier nuclei, up to ^{261}Bh and ^{266}Mt, were determined. These new masses were compared with theoretical global mass models and demonstrated to be in good agreement with macroscopic-microscopic models in this region. The empirical shell gap parameter δ_{2n} derived from three isotopic masses was updated with the new masses and corroborates the existence of the deformed N=152 neutron shell closure for Md and Lr.
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Affiliation(s)
- Y Ito
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
| | - P Schury
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako 351-0198, Japan
| | - M Wada
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako 351-0198, Japan
| | - F Arai
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
- University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H Haba
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
| | - Y Hirayama
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako 351-0198, Japan
| | - S Ishizawa
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
- Graduate School of Science and Engineering, Yamagata University, Yamagata 990-8560, Japan
| | - D Kaji
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
| | - S Kimura
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako 351-0198, Japan
- University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H Koura
- Japan Atomic Energy Agency, Tokai, Ibaraki 319-1185, Japan
| | - M MacCormick
- Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - H Miyatake
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako 351-0198, Japan
| | - J Y Moon
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako 351-0198, Japan
- Rare Isotope Science Project, Institute for Basic Science (IBS), Daejeon 305-811, Korea
| | - K Morimoto
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
| | - K Morita
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
- Department of Physics, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - M Mukai
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako 351-0198, Japan
- University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - I Murray
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
| | - T Niwase
- Department of Physics, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - K Okada
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
- Sophia University, Chiyoda-ku, Tokyo 102-8554, Japan
| | - A Ozawa
- University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M Rosenbusch
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
| | - A Takamine
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
| | - T Tanaka
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
- Department of Physics, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - Y X Watanabe
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako 351-0198, Japan
| | - H Wollnik
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003, USA
| | - S Yamaki
- RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan
- Department of Physics, Saitama University, Sakura-ku, Saitama 338-8570, Japan
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9
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Welker A, Althubiti NAS, Atanasov D, Blaum K, Cocolios TE, Herfurth F, Kreim S, Lunney D, Manea V, Mougeot M, Neidherr D, Nowacki F, Poves A, Rosenbusch M, Schweikhard L, Wienholtz F, Wolf RN, Zuber K. Binding Energy of ^{79}Cu: Probing the Structure of the Doubly Magic ^{78}Ni from Only One Proton Away. Phys Rev Lett 2017; 119:192502. [PMID: 29219497 DOI: 10.1103/physrevlett.119.192502] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Indexed: 06/07/2023]
Abstract
The masses of the neutron-rich copper isotopes ^{75-79}Cu are determined using the precision mass spectrometer ISOLTRAP at the CERN-ISOLDE facility. The trend from the new data differs significantly from that of previous results, offering a first accurate view of the mass surface adjacent to the Z=28, N=50 nuclide ^{78}Ni and supporting a doubly magic character. The new masses compare very well with large-scale shell-model calculations that predict shape coexistence in a doubly magic ^{78}Ni and a new island of inversion for Z<28. A coherent picture of this important exotic region begins to emerge where excitations across Z=28 and N=50 form a delicate equilibrium with a spherical mean field.
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Affiliation(s)
- A Welker
- Technische Universität Dresden, 01069 Dresden, Germany
- CERN Geneva, 1211 Geneva, Switzerland
| | - N A S Althubiti
- University of Manchester, Manchester M13 9PL, United Kingdom
| | - D Atanasov
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - K Blaum
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - T E Cocolios
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
| | - F Herfurth
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - S Kreim
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - D Lunney
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France
| | - V Manea
- CERN Geneva, 1211 Geneva, Switzerland
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M Mougeot
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France
| | - D Neidherr
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - F Nowacki
- Université de Strasbourg, IPHC, 67037 Strasbourg, France
- CNRS, UMR7178, 67037 Strasbourg, France
| | - A Poves
- Departamento de Física Teórica and IFT-UAM/CSIC, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
- Institute for Advanced Study, Université de Strasbourg, 67083 Strasbourg, France
| | - M Rosenbusch
- Ernst-Moritz-Arndt-Universität, Institut für Physik, 17487 Greifswald, Germany
| | - L Schweikhard
- Ernst-Moritz-Arndt-Universität, Institut für Physik, 17487 Greifswald, Germany
| | - F Wienholtz
- CERN Geneva, 1211 Geneva, Switzerland
- Ernst-Moritz-Arndt-Universität, Institut für Physik, 17487 Greifswald, Germany
| | - R N Wolf
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - K Zuber
- Technische Universität Dresden, 01069 Dresden, Germany
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10
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Welker A, Althubiti N, Atanasov D, Blaum K, Herfurth F, Kreim S, Koester U, Lunney D, Mougeot M, Manea V, Neidherr D, Rosenbusch M, Schweikhard L, Wienholtz F, Wolf R, Zuber K. Yield study and optimization of nuclear isotopes for cancer treatment and diagnostics with ISOLTRAP/CERN. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)30232-8] [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: 10/22/2022]
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11
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Atanasov D, Ascher P, Blaum K, Cakirli RB, Cocolios TE, George S, Goriely S, Herfurth F, Janka HT, Just O, Kowalska M, Kreim S, Kisler D, Litvinov YA, Lunney D, Manea V, Neidherr D, Rosenbusch M, Schweikhard L, Welker A, Wienholtz F, Wolf RN, Zuber K. Precision Mass Measurements of ^{129-131}Cd and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process. Phys Rev Lett 2015; 115:232501. [PMID: 26684113 DOI: 10.1103/physrevlett.115.232501] [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: 07/14/2015] [Indexed: 06/05/2023]
Abstract
Masses adjacent to the classical waiting-point nuclide ^{130}Cd have been measured by using the Penning-trap spectrometer ISOLTRAP at ISOLDE/CERN. We find a significant deviation of over 400 keV from earlier values evaluated by using nuclear beta-decay data. The new measurements show the reduction of the N=82 shell gap below the doubly magic ^{132}Sn. The nucleosynthesis associated with the ejected wind from type-II supernovae as well as from compact object binary mergers is studied, by using state-of-the-art hydrodynamic simulations. We find a consistent and direct impact of the newly measured masses on the calculated abundances in the A=128-132 region and a reduction of the uncertainties from the precision mass input data.
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Affiliation(s)
- D Atanasov
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - P Ascher
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - K Blaum
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - R B Cakirli
- Department of Physics, University of Istanbul, 34134 Istanbul, Turkey
| | - T E Cocolios
- University of Manchester, Manchester M13 9PL, United Kingdom
| | - S George
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - S Goriely
- Institut d'Astronomie et d'Astrophysique, CP-226, Université Libre de Bruxelles, 1050 Brussels, Belgium
| | - F Herfurth
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - H-T Janka
- Max-Planck-Institut für Astrophysik, Postfach 1317, 85741 Garching, Germany
| | - O Just
- Max-Planck-Institut für Astrophysik, Postfach 1317, 85741 Garching, Germany
| | | | - S Kreim
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- CERN, 1211 Geneva, Switzerland
| | - D Kisler
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Yu A Litvinov
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - D Lunney
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France
| | - V Manea
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France
| | - D Neidherr
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - M Rosenbusch
- Ernst-Moritz-Arndt-Universität, Institut für Physik, 17487 Greifswald, Germany
| | - L Schweikhard
- Ernst-Moritz-Arndt-Universität, Institut für Physik, 17487 Greifswald, Germany
| | - A Welker
- Technische Universität Dresden, 01069 Dresden, Germany
| | - F Wienholtz
- Ernst-Moritz-Arndt-Universität, Institut für Physik, 17487 Greifswald, Germany
| | - R N Wolf
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - K Zuber
- Technische Universität Dresden, 01069 Dresden, Germany
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12
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Rosenbusch M, Ascher P, Atanasov D, Barbieri C, Beck D, Blaum K, Borgmann C, Breitenfeldt M, Cakirli RB, Cipollone A, George S, Herfurth F, Kowalska M, Kreim S, Lunney D, Manea V, Navrátil P, Neidherr D, Schweikhard L, Somà V, Stanja J, Wienholtz F, Wolf RN, Zuber K. Probing the N=32 Shell Closure below the Magic Proton Number Z=20: Mass Measurements of the Exotic Isotopes ^{52,53}K. Phys Rev Lett 2015; 114:202501. [PMID: 26047224 DOI: 10.1103/physrevlett.114.202501] [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: 12/31/2014] [Indexed: 06/04/2023]
Abstract
The recently confirmed neutron-shell closure at N=32 has been investigated for the first time below the magic proton number Z=20 with mass measurements of the exotic isotopes (52,53)K, the latter being the shortest-lived nuclide investigated at the online mass spectrometer ISOLTRAP. The resulting two-neutron separation energies reveal a 3 MeV shell gap at N=32, slightly lower than for 52Ca, highlighting the doubly magic nature of this nuclide. Skyrme-Hartree-Fock-Bogoliubov and ab initio Gorkov-Green function calculations are challenged by the new measurements but reproduce qualitatively the observed shell effect.
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Affiliation(s)
- M Rosenbusch
- Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany
| | - P Ascher
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - D Atanasov
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - C Barbieri
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - D Beck
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
| | - K Blaum
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Ch Borgmann
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - M Breitenfeldt
- Instituut voor Kern- en Stralingsfysica, KU Leuven, Celestijnenlaan 200d, B-3001 Heverlee, Belgium
| | - R B Cakirli
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- Department of Physics, University of Istanbul, 34134 Istanbul, Turkey
| | - A Cipollone
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - S George
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - F Herfurth
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
| | | | - S Kreim
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- CERN, 1211 Geneva 23, Switzerland
| | - D Lunney
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France
| | - V Manea
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France
| | - P Navrátil
- TRIUMF, 4004 Westbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - D Neidherr
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
| | - L Schweikhard
- Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany
| | - V Somà
- CEA-Saclay, IRFU/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - J Stanja
- Institut für Kern- und Teilchenphysik, Technische Universität Dresden, 01069 Dresden, Germany
| | - F Wienholtz
- Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany
| | - R N Wolf
- Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - K Zuber
- Institut für Kern- und Teilchenphysik, Technische Universität Dresden, 01069 Dresden, Germany
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13
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Wienholtz F, Beck D, Blaum K, Borgmann C, Breitenfeldt M, Cakirli RB, George S, Herfurth F, Holt JD, Kowalska M, Kreim S, Lunney D, Manea V, Menéndez J, Neidherr D, Rosenbusch M, Schweikhard L, Schwenk A, Simonis J, Stanja J, Wolf RN, Zuber K. Erratum: Masses of exotic calcium isotopes pin down nuclear forces. Nature 2013. [DOI: 10.1038/nature12431] [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: 11/09/2022]
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14
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Wolf RN, Beck D, Blaum K, Böhm C, Borgmann C, Breitenfeldt M, Chamel N, Goriely S, Herfurth F, Kowalska M, Kreim S, Lunney D, Manea V, Minaya Ramirez E, Naimi S, Neidherr D, Rosenbusch M, Schweikhard L, Stanja J, Wienholtz F, Zuber K. Plumbing neutron stars to new depths with the binding energy of the exotic nuclide 82Zn. Phys Rev Lett 2013; 110:041101. [PMID: 25166148 DOI: 10.1103/physrevlett.110.041101] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2012] [Indexed: 06/03/2023]
Abstract
Modeling the composition of neutron-star crusts depends strongly on binding energies of neutron-rich nuclides near the N = 50 and N = 82 shell closures. Using a recent development of time-of-flight mass spectrometry for on-line purification of radioactive ion beams to access more exotic species, we have determined for the first time the mass of (82)Zn with the ISOLTRAP setup at the ISOLDE-CERN facility. With a robust neutron-star model based on nuclear energy-density-functional theory, we solve the general relativistic Tolman-Oppenheimer-Volkoff equations and calculate the neutron-star crust composition based on the new experimental mass. The composition profile is not only altered but now constrained by experimental data deeper into the crust than before.
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Affiliation(s)
- R N Wolf
- Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany
| | - D Beck
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
| | - K Blaum
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Ch Böhm
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Ch Borgmann
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - M Breitenfeldt
- Instituut voor Kern- en Stralingsfysica, KU Leuven, Celestijnenlaan 200d, B-3001 Heverlee, Belgium
| | - N Chamel
- Institut d'Astronomie et d'Astrophysique, CP-226, Université Libre de Bruxelles, 1050 Brussels, Belgium
| | - S Goriely
- Institut d'Astronomie et d'Astrophysique, CP-226, Université Libre de Bruxelles, 1050 Brussels, Belgium
| | - F Herfurth
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
| | | | - S Kreim
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany and CERN, 1211 Geneva 23, Switzerland
| | - D Lunney
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France
| | - V Manea
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France
| | - E Minaya Ramirez
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany and Helmholtz-Institut Mainz, 55099 Mainz, Germany
| | - S Naimi
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France and RIKEN Nishina Center for Accelerator-based Science, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - D Neidherr
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany and Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - M Rosenbusch
- Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany
| | - L Schweikhard
- Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany
| | - J Stanja
- Institut für Kern- und Teilchenphysik, Technische Universität Dresden, 01069 Dresden, Germany
| | - F Wienholtz
- Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany
| | - K Zuber
- Institut für Kern- und Teilchenphysik, Technische Universität Dresden, 01069 Dresden, Germany
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15
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Fink D, Barea J, Beck D, Blaum K, Böhm C, Borgmann C, Breitenfeldt M, Herfurth F, Herlert A, Kotila J, Kowalska M, Kreim S, Lunney D, Naimi S, Rosenbusch M, Schwarz S, Schweikhard L, Simkovic F, Stanja J, Zuber K. Q value and half-lives for the double-β-decay nuclide 110Pd. Phys Rev Lett 2012; 108:062502. [PMID: 22401059 DOI: 10.1103/physrevlett.108.062502] [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: 08/22/2011] [Revised: 01/17/2012] [Indexed: 05/31/2023]
Abstract
The 110Pd double-β decay Q value was measured with the Penning-trap mass spectrometer ISOLTRAP to be Q=2017.85(64) keV. This value shifted by 14 keV compared with the literature value and is 17 times more precise, resulting in new phase-space factors for the two-neutrino and neutrinoless decay modes. In addition a new set of the relevant matrix elements has been calculated. The expected half-life of the two-neutrino mode was reevaluated as 1.5(6)×10(20) yr. With its high natural abundance, the new results reveal 110Pd to be an excellent candidate for double-β decay studies.
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Affiliation(s)
- D Fink
- Max-Planck-Institut für Kernphysik, Heidelberg, Germany
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16
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Naimi S, Audi G, Beck D, Blaum K, Böhm C, Borgmann C, Breitenfeldt M, George S, Herfurth F, Herlert A, Kowalska M, Kreim S, Lunney D, Neidherr D, Rosenbusch M, Schwarz S, Schweikhard L, Zuber K. Critical-point boundary for the nuclear quantum phase transition near A=100 from mass measurements of (96,97)Kr. Phys Rev Lett 2010; 105:032502. [PMID: 20867760 DOI: 10.1103/physrevlett.105.032502] [Citation(s) in RCA: 3] [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: 03/16/2010] [Indexed: 05/29/2023]
Abstract
Mass measurements of (96,97)Kr using the ISOLTRAP Penning-trap spectrometer at CERN-ISOLDE are reported, extending the mass surface beyond N=60 for Z=36. These new results show behavior in sharp contrast to the heavier neighbors where a sudden and intense deformation is present. We interpret this as the establishment of a nuclear quantum phase transition critical-point boundary. The new masses confirm findings from nuclear mean-square charge-radius measurements up to N=60 but are at variance with conclusions from recent gamma-ray spectroscopy.
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Affiliation(s)
- S Naimi
- CSNSM-IN2P3-CNRS, Université de Paris Sud, 91405 Orsay, France
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17
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Neidherr D, Audi G, Beck D, Blaum K, Böhm C, Breitenfeldt M, Cakirli RB, Casten RF, George S, Herfurth F, Herlert A, Kellerbauer A, Kowalska M, Lunney D, Minaya-Ramirez E, Naimi S, Noah E, Penescu L, Rosenbusch M, Schwarz S, Schweikhard L, Stora T. Discovery of 229Rn and the structure of the heaviest Rn and Ra isotopes from Penning-trap mass measurements. Phys Rev Lett 2009; 102:112501. [PMID: 19392194 DOI: 10.1103/physrevlett.102.112501] [Citation(s) in RCA: 6] [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: 11/04/2008] [Indexed: 05/27/2023]
Abstract
The masses of the neutron-rich radon isotopes {223-229}Rn have been determined for the first time, using the ISOLTRAP setup at CERN ISOLDE. In addition, this experiment marks the first discovery of a new nuclide, 229Rn, by Penning-trap mass measurement. The new, high-accuracy data allow a fine examination of the mass surface, via the valence-nucleon interaction deltaV{pn}. The results reveal intriguing behavior, possibly reflecting either a N=134 subshell closure or an octupolar deformation in this region.
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Affiliation(s)
- D Neidherr
- Institut für Physik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
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18
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Rosenbusch M, Di Risio C, Marques R. Substoichiometric radiochemical determination of molybdenum with crystal violet. J Radioanal Nucl Chem 1995. [DOI: 10.1007/bf02162460] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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