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Herring SA, Putukian M, Kibler WB, Leclere L, Boyajian-O'Neill L, Day MA, Franks RR, Indelicato P, Matuszak J, Miller TL, O'Connor F, Poddar S, Svoboda SJ, Zaremski JL. Team Physician Consensus Statement: Return to Sport/Return to Play and the Team Physician: A Team Physician Consensus Statement-2023 Update. Med Sci Sports Exerc 2024; 56:767-775. [PMID: 38616326 DOI: 10.1249/mss.0000000000003371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Affiliation(s)
- Stanley A Herring
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA
| | | | - W Ben Kibler
- Shoulder Center of Kentucky, Lexington Clinic, Lexington KY
| | - Lance Leclere
- Department of Orthopaedic Surgery, Vanderbilt University Medical Center, Nashville, TN
| | | | | | | | - Peter Indelicato
- Department of Orthopedic Surgery and Sports Medicine, College of Medicine, University of Florida, Gainesville, FL
| | | | - Timothy L Miller
- Department of Orthopaedic Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Fran O'Connor
- Department of Military and Emergency Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD
| | - Sourav Poddar
- Primary Sports Medicine, University of Colorado School of Medicine, Denver, CO
| | | | - Jason L Zaremski
- Department of Physical Medicine & Rehabilitation, University of Florida Health, Gainesville, FL
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2
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Herring SA, Putukian M, Kibler WB, LeClere L, Boyajian-O'Neill L, Day MA, Franks RR, Indelicato P, Matuszak J, Miller TL, O'Connor F, Poddar S, Svoboda SJ, Zaremski JL. Team Physician Consensus Statement: Return to Sport/Return to Play and the Team Physician: A Team Physician Consensus Statement-2023 Update. Curr Sports Med Rep 2024; 23:183-191. [PMID: 38709944 DOI: 10.1249/jsr.0000000000001169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Affiliation(s)
- Stanley A Herring
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA
| | | | - W Ben Kibler
- Shoulder Center of Kentucky, Lexington Clinic, Lexington KY
| | - Lance LeClere
- Department of Orthopaedic Surgery, Vanderbilt University Medical Center, Nashville, TN
| | | | | | | | - Peter Indelicato
- Department of Orthopedic Surgery and Sports Medicine, College of Medicine, University of Florida, Gainesville, FL
| | | | - Timothy L Miller
- Department of Orthopaedic Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Fran O'Connor
- Department of Military and Emergency Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD
| | - Sourav Poddar
- Primary Sports Medicine, University of Colorado School of Medicine, Denver, CO
| | | | - Jason L Zaremski
- Department of Physical Medicine & Rehabilitation, University of Florida Health, Gainesville, FL
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3
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Loetzsch R, Beyer HF, Duval L, Spillmann U, Banaś D, Dergham P, Kröger FM, Glorius J, Grisenti RE, Guerra M, Gumberidze A, Heß R, Hillenbrand PM, Indelicato P, Jagodzinski P, Lamour E, Lorentz B, Litvinov S, Litvinov YA, Machado J, Paul N, Paulus GG, Petridis N, Santos JP, Scheidel M, Sidhu RS, Steck M, Steydli S, Szary K, Trotsenko S, Uschmann I, Weber G, Stöhlker T, Trassinelli M. Testing quantum electrodynamics in extreme fields using helium-like uranium. Nature 2024; 625:673-678. [PMID: 38267680 PMCID: PMC10808054 DOI: 10.1038/s41586-023-06910-y] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 11/28/2023] [Indexed: 01/26/2024]
Abstract
Quantum electrodynamics (QED), the quantum field theory that describes the interaction between light and matter, is commonly regarded as the best-tested quantum theory in modern physics. However, this claim is mostly based on extremely precise studies performed in the domain of relatively low field strengths and light atoms and ions1-6. In the realm of very strong electromagnetic fields such as in the heaviest highly charged ions (with nuclear charge Z ≫ 1), QED calculations enter a qualitatively different, non-perturbative regime. Yet, the corresponding experimental studies are very challenging, and theoretical predictions are only partially tested. Here we present an experiment sensitive to higher-order QED effects and electron-electron interactions in the high-Z regime. This is achieved by using a multi-reference method based on Doppler-tuned X-ray emission from stored relativistic uranium ions with different charge states. The energy of the 1s1/22p3/2 J = 2 → 1s1/22s1/2 J = 1 intrashell transition in the heaviest two-electron ion (U90+) is obtained with an accuracy of 37 ppm. Furthermore, a comparison of uranium ions with different numbers of bound electrons enables us to disentangle and to test separately the one-electron higher-order QED effects and the bound electron-electron interaction terms without the uncertainty related to the nuclear radius. Moreover, our experimental result can discriminate between several state-of-the-art theoretical approaches and provides an important benchmark for calculations in the strong-field domain.
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Affiliation(s)
- R Loetzsch
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany.
| | - H F Beyer
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - L Duval
- Laboratoire Kastler Brossel, Sorbonne Université, ENS-PSL Research University, Collège de France, CNRS, Paris, France
| | - U Spillmann
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - D Banaś
- Institute of Physics, Jan Kochanowski University, Kielce, Poland
| | - P Dergham
- Institut des NanoSciences de Paris, CNRS, Sorbonne Université, Paris, France
| | - F M Kröger
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Jena, Jena, Germany
| | - J Glorius
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - R E Grisenti
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - M Guerra
- Laboratory of Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-UNL), Department of Physics, NOVA School of Science and Technology, NOVA University Lisbon, Caparica, Portugal
| | - A Gumberidze
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - R Heß
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - P-M Hillenbrand
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- I. Physikalisches Institut, Justus-Liebig-Universität, Giessen, Germany
| | - P Indelicato
- Laboratoire Kastler Brossel, Sorbonne Université, ENS-PSL Research University, Collège de France, CNRS, Paris, France
| | - P Jagodzinski
- Institute of Physics, Jan Kochanowski University, Kielce, Poland
| | - E Lamour
- Institut des NanoSciences de Paris, CNRS, Sorbonne Université, Paris, France
| | - B Lorentz
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - S Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - J Machado
- Laboratory of Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-UNL), Department of Physics, NOVA School of Science and Technology, NOVA University Lisbon, Caparica, Portugal
| | - N Paul
- Laboratoire Kastler Brossel, Sorbonne Université, ENS-PSL Research University, Collège de France, CNRS, Paris, France
| | - G G Paulus
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany
- Helmholtz-Institut Jena, Jena, Germany
| | - N Petridis
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Institut für Kernphysik, Goethe-Universität, Frankfurt am Main, Germany
| | - J P Santos
- Laboratory of Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-UNL), Department of Physics, NOVA School of Science and Technology, NOVA University Lisbon, Caparica, Portugal
| | - M Scheidel
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - R S Sidhu
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- School of Physics and Astronomy, The University of Edinburgh, Edinburgh, UK
| | - M Steck
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - S Steydli
- Institut des NanoSciences de Paris, CNRS, Sorbonne Université, Paris, France
| | - K Szary
- Institute of Physics, Jan Kochanowski University, Kielce, Poland
| | - S Trotsenko
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Jena, Jena, Germany
| | - I Uschmann
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany
| | - G Weber
- Helmholtz-Institut Jena, Jena, Germany
| | - Th Stöhlker
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Jena, Jena, Germany
| | - M Trassinelli
- Institut des NanoSciences de Paris, CNRS, Sorbonne Université, Paris, France.
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4
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Okumura T, Azuma T, Bennett DA, Chiu I, Doriese WB, Durkin MS, Fowler JW, Gard JD, Hashimoto T, Hayakawa R, Hilton GC, Ichinohe Y, Indelicato P, Isobe T, Kanda S, Katsuragawa M, Kawamura N, Kino Y, Mine K, Miyake Y, Morgan KM, Ninomiya K, Noda H, O'Neil GC, Okada S, Okutsu K, Paul N, Reintsema CD, Schmidt DR, Shimomura K, Strasser P, Suda H, Swetz DS, Takahashi T, Takeda S, Takeshita S, Tampo M, Tatsuno H, Ueno Y, Ullom JN, Watanabe S, Yamada S. Proof-of-Principle Experiment for Testing Strong-Field Quantum Electrodynamics with Exotic Atoms: High Precision X-Ray Spectroscopy of Muonic Neon. Phys Rev Lett 2023; 130:173001. [PMID: 37172243 DOI: 10.1103/physrevlett.130.173001] [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: 12/08/2021] [Revised: 02/10/2023] [Accepted: 03/10/2023] [Indexed: 05/14/2023]
Abstract
To test bound-state quantum electrodynamics (BSQED) in the strong-field regime, we have performed high precision x-ray spectroscopy of the 5g-4f and 5f- 4d transitions (BSQED contribution of 2.4 and 5.2 eV, respectively) of muonic neon atoms in the low-pressure gas phase without bound electrons. Muonic atoms have been recently proposed as an alternative to few-electron high-Z ions for BSQED tests by focusing on circular Rydberg states where nuclear contributions are negligibly small. We determined the 5g_{9/2}- 4f_{7/2} transition energy to be 6297.08±0.04(stat)±0.13(syst) eV using superconducting transition-edge sensor microcalorimeters (5.2-5.5 eV FWHM resolution), which agrees well with the most advanced BSQED theoretical prediction of 6297.26 eV.
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Affiliation(s)
- T Okumura
- Atomic, Molecular, and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - T Azuma
- Atomic, Molecular, and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - D A Bennett
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - I Chiu
- Institute for Radiation Sciences, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - W B Doriese
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - M S Durkin
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - J W Fowler
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - J D Gard
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - T Hashimoto
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai 319-1184, Japan
| | - R Hayakawa
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - G C Hilton
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Y Ichinohe
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan
| | - P Indelicato
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, Case 74, 4, place Jussieu, 75005 Paris, France
| | - T Isobe
- RIKEN Nishina Center, RIKEN, Wako 351-0198, Japan
| | - S Kanda
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - M Katsuragawa
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - N Kawamura
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Y Kino
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - K Mine
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - Y Miyake
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - K M Morgan
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
- Department of Physics, University of Colorado Boulder, Boulder, Colorado 80309, USA
| | - K Ninomiya
- Institute for Radiation Sciences, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - H Noda
- Department of Earth and Space Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - G C O'Neil
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - S Okada
- Engineering Science Laboratory, Chubu University, Kasugai, Aichi 487-8501, Japan
| | - K Okutsu
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - N Paul
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, Case 74, 4, place Jussieu, 75005 Paris, France
| | - C D Reintsema
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - D R Schmidt
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - K Shimomura
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - P Strasser
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - H Suda
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - D S Swetz
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - T Takahashi
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - S Takeda
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - S Takeshita
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - M Tampo
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - H Tatsuno
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Y Ueno
- Atomic, Molecular, and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - J N Ullom
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - S Watanabe
- Department of Space Astronomy and Astrophysics, Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa 252-5210, Japan
| | - S Yamada
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan
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5
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Adamczak A, Antognini A, Berger N, Cocolios TE, Deokar N, Düllmann CE, Eggenberger A, Eichler R, Heines M, Hess H, Indelicato P, Kirch K, Knecht A, Krauth JJ, Nuber J, Ouf A, Papa A, Pohl R, Rapisarda E, Reiter P, Ritjoho N, Roccia S, Seidlitz M, Severijns N, von Schoeler K, Skawran A, Vogiatzi SM, Warr N, Wauters F. Muonic atom spectroscopy with microgram target material. Eur Phys J A Hadron Nucl 2023; 59:15. [PMID: 36751673 PMCID: PMC9898421 DOI: 10.1140/epja/s10050-023-00930-y] [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] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
Muonic atom spectroscopy-the measurement of the x rays emitted during the formation process of a muonic atom-has a long standing history in probing the shape and size of nuclei. In fact, almost all stable elements have been subject to muonic atom spectroscopy measurements and the absolute charge radii extracted from these measurements typically offer the highest accuracy available. However, so far only targets of at least a few hundred milligram could be used as it required to stop a muon beam directly in the target to form the muonic atom. We have developed a new method relying on repeated transfer reactions taking place inside a 100 bar hydrogen gas cell with an admixture of 0.25% deuterium that allows us to drastically reduce the amount of target material needed while still offering an adequate efficiency. Detailed simulations of the transfer reactions match the measured data, suggesting good understanding of the processes taking place inside the gas mixture. As a proof of principle we demonstrate the method with a measurement of the 2p-1s muonic x rays from a 5 μ g gold target.
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Affiliation(s)
- A. Adamczak
- Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland
| | - A. Antognini
- Paul Scherrer Institut, Villigen, Switzerland
- Institut für Teilchen- und Astrophysik, ETH Zürich, Zürich, Switzerland
| | - N. Berger
- Institute of Nuclear Physics, Johannes Gutenberg University Mainz, Mainz, Germany
- PRISMA+ Cluster of Excellence, Johannes Gutenberg University Mainz, Mainz, Germany
| | - T. E. Cocolios
- Instituut voor Kern- en Stralingfysica, KU Leuven, Leuven, Belgium
| | - N. Deokar
- Institute of Nuclear Physics, Johannes Gutenberg University Mainz, Mainz, Germany
- PRISMA+ Cluster of Excellence, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Ch. E. Düllmann
- PRISMA+ Cluster of Excellence, Johannes Gutenberg University Mainz, Mainz, Germany
- Department of Chemistry-TRIGA Site, Johannes Gutenberg University Mainz, Mainz, Germany
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz Institute Mainz, Mainz, Germany
| | - A. Eggenberger
- Institut für Teilchen- und Astrophysik, ETH Zürich, Zürich, Switzerland
| | - R. Eichler
- Paul Scherrer Institut, Villigen, Switzerland
| | - M. Heines
- Instituut voor Kern- en Stralingfysica, KU Leuven, Leuven, Belgium
| | - H. Hess
- Institut für Kernphysik, Universität zu Köln, Köln, Germany
| | - P. Indelicato
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, Case 74; 4, place Jussieu, 75005 Paris, France
| | - K. Kirch
- Paul Scherrer Institut, Villigen, Switzerland
- Institut für Teilchen- und Astrophysik, ETH Zürich, Zürich, Switzerland
| | - A. Knecht
- Paul Scherrer Institut, Villigen, Switzerland
| | - J. J. Krauth
- PRISMA+ Cluster of Excellence, Johannes Gutenberg University Mainz, Mainz, Germany
- Institute of Physics, Johannes Gutenberg Universität Mainz, Mainz, Germany
| | - J. Nuber
- Paul Scherrer Institut, Villigen, Switzerland
- Institut für Teilchen- und Astrophysik, ETH Zürich, Zürich, Switzerland
| | - A. Ouf
- Institute of Physics, Johannes Gutenberg Universität Mainz, Mainz, Germany
| | - A. Papa
- Paul Scherrer Institut, Villigen, Switzerland
- Department of Physics, Universitá di Pisa, Pisa, Italy
| | - R. Pohl
- PRISMA+ Cluster of Excellence, Johannes Gutenberg University Mainz, Mainz, Germany
- Institute of Physics, Johannes Gutenberg Universität Mainz, Mainz, Germany
| | | | - P. Reiter
- Institut für Kernphysik, Universität zu Köln, Köln, Germany
| | - N. Ritjoho
- Paul Scherrer Institut, Villigen, Switzerland
- Institut für Teilchen- und Astrophysik, ETH Zürich, Zürich, Switzerland
| | - S. Roccia
- Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38026 Grenoble, France
| | - M. Seidlitz
- Institut für Kernphysik, Universität zu Köln, Köln, Germany
| | - N. Severijns
- Instituut voor Kern- en Stralingfysica, KU Leuven, Leuven, Belgium
| | - K. von Schoeler
- Institut für Teilchen- und Astrophysik, ETH Zürich, Zürich, Switzerland
| | - A. Skawran
- Paul Scherrer Institut, Villigen, Switzerland
- Institut für Teilchen- und Astrophysik, ETH Zürich, Zürich, Switzerland
| | - S. M. Vogiatzi
- Paul Scherrer Institut, Villigen, Switzerland
- Institut für Teilchen- und Astrophysik, ETH Zürich, Zürich, Switzerland
| | - N. Warr
- Institut für Kernphysik, Universität zu Köln, Köln, Germany
| | - F. Wauters
- Institute of Nuclear Physics, Johannes Gutenberg University Mainz, Mainz, Germany
- PRISMA+ Cluster of Excellence, Johannes Gutenberg University Mainz, Mainz, Germany
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6
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Gotta D, Amaro F, Anagnostopoulos D, Bühler P, Covita D, Fuhrmann H, Gorke H, Gruber A, Hennebach M, Hirtl A, Ishiwatari T, Indelicato P, Jensen T, Le Bigot EO, Liu YW, Manil B, Markushin V, Marton J, Nekipelov M, Pomerantsev V, Popov V, el Hassani AJR, dos Santos JMF, Schlesser S, Schmid P, Simons L, Strauch T, Theisen M, Trassinelli M, Veloso JFCA, Zmeskal J. Pionic hydrogen and deuterium. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202226201005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The strong-interaction effects both in pionic hydrogen and deuterium atoms have been re-determined with improved precision. The hadronic shift and width in pionic hydrogen together with the hadronic shift in pionic deuterium constitute a one-fold constraint for the two independent pion-nucleon scattering lengths. Furthermore, the hadronic width in pionic deuterium measures the transition strength of s-wave pions on an isoscalar nucleon-nucleon pair which is an independent quantity not related to the pion-nucleon scattering lengths. The experiment was performed at the Paul Scherrer Institute by stopping a high-intensity low-energy pion beam in gaseous targets using the cyclotron trap. The X-rays emitted by the πH and πD atoms were analysed with a high resolution Bragg spectrometer equipped with spherically bent crystals. The pion-nucleon scattering lengths and other physical quantities extracted from the atom data are in good agreement with the results obtained from pionnucleon and nucleon-nucleon scattering experiments and confirm that a consistent picture is achieved for the low-energy pion-nucleon sector with respect to the expectations of chiral perturbation theory.
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7
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Ménesguen Y, Lépy MC, Ito Y, Yamashita M, Fukushima S, Tochio T, Polasik M, Słabkowska K, Syrocki Ł, Indelicato P, Gomilsek J, Marques J, Sampaio J, Machado J, Amaro P, Guerra M, Santos J, Parente F. Structure of single KL0–, double KL1–, and triple KL2 − ionization in Mg, Al, and Si targets induced by photons, and their absorption spectra. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2022.110048] [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: 10/19/2022]
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8
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Filianin P, Lyu C, Door M, Blaum K, Huang WJ, Haverkort M, Indelicato P, Keitel CH, Kromer K, Lange D, Novikov YN, Rischka A, Schüssler RX, Schweiger C, Sturm S, Ulmer S, Harman Z, Eliseev S. Direct Q-Value Determination of the β^{-} Decay of ^{187}Re. Phys Rev Lett 2021; 127:072502. [PMID: 34459634 DOI: 10.1103/physrevlett.127.072502] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 06/01/2021] [Accepted: 07/08/2021] [Indexed: 06/13/2023]
Abstract
The cyclotron frequency ratio of ^{187}Os^{29+} to ^{187}Re^{29+} ions was measured with the Penning-trap mass spectrometer PENTATRAP. The achieved result of R=1.000 000 013 882(5) is to date the most precise such measurement performed on ions. Furthermore, the total binding-energy difference of the 29 missing electrons in Re and Os was calculated by relativistic multiconfiguration methods, yielding the value of ΔE=53.5(10) eV. Finally, using the achieved results, the mass difference between neutral ^{187}Re and ^{187}Os, i.e., the Q value of the β^{-} decay of ^{187}Re, is determined to be 2470.9(13) eV.
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Affiliation(s)
- P Filianin
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - C Lyu
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M Door
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - K Blaum
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - W J Huang
- Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516003, China
| | - M Haverkort
- Institute for Theoretical Physics, Heidelberg University, 69120 Heidelberg, Germany
| | | | - C H Keitel
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - K Kromer
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - D Lange
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - Y N Novikov
- Department of Physics, St Petersburg State University, St Petersburg 198504, Russia
- NRC "Kurchatov Institute"-Petersburg Nuclear Physics Institute, Gatchina 188300, Russia
| | - A Rischka
- ARC Centre for Engineered Quantum Systems, School of Physics, The University of Sydney, NSW 2006, Australia
| | - R X Schüssler
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - Ch Schweiger
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - S Sturm
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - S Ulmer
- Ulmer Fundamental Symmetries Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
| | - Z Harman
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - S Eliseev
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
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9
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Okumura T, Azuma T, Bennett DA, Caradonna P, Chiu I, Doriese WB, Durkin MS, Fowler JW, Gard JD, Hashimoto T, Hayakawa R, Hilton GC, Ichinohe Y, Indelicato P, Isobe T, Kanda S, Kato D, Katsuragawa M, Kawamura N, Kino Y, Kubo MK, Mine K, Miyake Y, Morgan KM, Ninomiya K, Noda H, O'Neil GC, Okada S, Okutsu K, Osawa T, Paul N, Reintsema CD, Schmidt DR, Shimomura K, Strasser P, Suda H, Swetz DS, Takahashi T, Takeda S, Takeshita S, Tampo M, Tatsuno H, Tong XM, Ueno Y, Ullom JN, Watanabe S, Yamada S. Deexcitation Dynamics of Muonic Atoms Revealed by High-Precision Spectroscopy of Electronic K X Rays. Phys Rev Lett 2021; 127:053001. [PMID: 34397250 DOI: 10.1103/physrevlett.127.053001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 06/11/2021] [Indexed: 06/13/2023]
Abstract
We observed electronic K x rays emitted from muonic iron atoms using superconducting transition-edge sensor microcalorimeters. The energy resolution of 5.2 eV in FWHM allowed us to observe the asymmetric broad profile of the electronic characteristic Kα and Kβ x rays together with the hypersatellite K^{h}α x rays around 6 keV. This signature reflects the time-dependent screening of the nuclear charge by the negative muon and the L-shell electrons, accompanied by electron side feeding. Assisted by a simulation, these data clearly reveal the electronic K- and L-shell hole production and their temporal evolution on the 10-20 fs scale during the muon cascade process.
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Affiliation(s)
- T Okumura
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - T Azuma
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - D A Bennett
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - P Caradonna
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - I Chiu
- Department of Chemistry, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - W B Doriese
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - M S Durkin
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - J W Fowler
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - J D Gard
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - T Hashimoto
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai 319-1184, Japan
| | - R Hayakawa
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - G C Hilton
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Y Ichinohe
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan
| | - P Indelicato
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, Case 74, 4, place Jussieu, 75005 Paris, France
| | - T Isobe
- RIKEN Nishina Center, RIKEN, Wako 351-0198, Japan
| | - S Kanda
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - D Kato
- National Institute for Fusion Science (NIFS), Toki, Gifu 509-5292, Japan
| | - M Katsuragawa
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - N Kawamura
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Y Kino
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - M K Kubo
- Department of Natural Sciences, College of Liberal Arts, International Christian University, Mitaka, Tokyo 181-8585, Japan
| | - K Mine
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - Y Miyake
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - K M Morgan
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - K Ninomiya
- Department of Chemistry, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - H Noda
- Department of Earth and Space Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - G C O'Neil
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - S Okada
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - K Okutsu
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - T Osawa
- Materials Sciences Research Center (MSRC), Japan Atomic Energy Agency (JAEA), Tokai 319-1184, Japan
| | - N Paul
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, Case 74, 4, place Jussieu, 75005 Paris, France
| | - C D Reintsema
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - D R Schmidt
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - K Shimomura
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - P Strasser
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - H Suda
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - D S Swetz
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - T Takahashi
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - S Takeda
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - S Takeshita
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - M Tampo
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - H Tatsuno
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - X M Tong
- Center for Computational Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
| | - Y Ueno
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - J N Ullom
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - S Watanabe
- Department of Space Astronomy and Astrophysics, Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa 252-5210, Japan
| | - S Yamada
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan
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10
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Abstract
Physician leadership of the interdisciplinary sports medicine team depends on fundamental leadership skills that often are overlooked in medical school. These leadership skills include effective communication, emotional intelligence, teamwork, selfless service, integrity, and critical thinking while utilizing an athlete-centered approach. Development of these skills will help to navigate team management and important decisions, such as return to play. The leadership session at the Advanced Team Physician Course sought to acknowledge the gap in medical training regarding leadership education and began to address it in a forum specifically for team physicians. Here we provide a summary of the lectures and presentations from the 2018 Advanced Team Physician Course in an effort to benefit a broader physician audience. This material should act as a framework for current and future team physicians to solidify their role as the leader of the medical team in caring for the athlete.
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Affiliation(s)
- Samantha Tayne
- Department of Orthopaedic Surgery, University of Illinois at Chicago, Chicago, IL
| | - Mark R Hutchinson
- Department of Orthopaedic Surgery, University of Illinois at Chicago, Chicago, IL
| | - Francis G O'Connor
- Department of Orthopaedic Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD
| | - Dean C Taylor
- Department of Orthopaedic Surgery, Duke University, Durham, NC
| | - Volker Musahl
- UPMC Freddie Fu Sports Medicine Center, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA
| | - Peter Indelicato
- UF Orthopaedics and Sports Medicine Institute, Department of Orthopaedics and Rehabilitation, University of Florida, Gainesville, FL
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11
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Rischka A, Cakir H, Door M, Filianin P, Harman Z, Huang WJ, Indelicato P, Keitel CH, König CM, Kromer K, Müller M, Novikov YN, Schüssler RX, Schweiger C, Eliseev S, Blaum K. Mass-Difference Measurements on Heavy Nuclides with an eV/c^{2} Accuracy in the PENTATRAP Spectrometer. Phys Rev Lett 2020; 124:113001. [PMID: 32242713 DOI: 10.1103/physrevlett.124.113001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 02/03/2020] [Indexed: 06/11/2023]
Abstract
First ever measurements of the ratios of free cyclotron frequencies of heavy, highly charged ions with Z>50 with relative uncertainties close to 10^{-11} are presented. Such accurate measurements have become realistic due to the construction of the novel cryogenic multi-Penning-trap mass spectrometer PENTATRAP. Based on the measured frequency ratios, the mass differences of five pairs of stable xenon isotopes, ranging from ^{126}Xe to ^{134}Xe, have been determined. Moreover, the first direct measurement of an electron binding energy in a heavy highly charged ion, namely of the 37th atomic electron in xenon, with an uncertainty of a few eV is demonstrated. The obtained value agrees with the calculated one using two independent, different implementations of the multiconfiguration Dirac-Hartree-Fock method. PENTATRAP opens the door to future measurements of electron binding energies in highly charged heavy ions for more stringent tests of bound-state quantum electrodynamics in strong electromagnetic fields and for an investigation of the manifestation of light dark matter in isotopic chains of certain chemical elements.
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Affiliation(s)
- A Rischka
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - H Cakir
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M Door
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - P Filianin
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - Z Harman
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - W J Huang
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - P Indelicato
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, Paris 75005, France
| | - C H Keitel
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - C M König
- Ruprecht-Karls-Universität Heidelberg, 69117 Heidelberg, Germany
| | - K Kromer
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M Müller
- Ruprecht-Karls-Universität Heidelberg, 69117 Heidelberg, Germany
| | - Y N Novikov
- Department of Physics, St. Petersburg State University, St. Petersburg 198504, Russia
- Petersburg Nuclear Physics Institute, 188300 Gatchina, Russia
| | - R X Schüssler
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - Ch Schweiger
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - S Eliseev
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - K Blaum
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
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12
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Adamczak A, Antognini A, Berger N, Cocolios T, Dressler R, Eggenberger A, Eichler R, Indelicato P, Jungmann K, Kirch K, Knecht A, Papa A, Pohl R, Pospelov M, Rapisarda E, Reiter P, Ritjoho N, Roccia S, Severijns N, Skawran A, Wauters F, Willmann L. Nuclear structure with radioactive muonic atoms. EPJ Web Conf 2018. [DOI: 10.1051/epjconf/201819304014] [Citation(s) in RCA: 2] [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: 11/14/2022] Open
Abstract
Muonic atoms have been used to extract the most accurate nuclear charge radii based on the detection of X-rays from the muonic cascades. Most stable and a few unstable isotopes have been investigated with muonic atom spectroscopy techniques. A new research project recently started at the Paul Scherrer Institut aims to extend the highresolution muonic atom spectroscopy for the precise determination of nuclear charge radii and other nuclear structure properties of radioactive isotopes. The challenge to combine the high-energy muon beam with small quantity of stopping mass is being addressed by developing the concept of stopping the muon in a high-density, a high-pressure hydrogen cell and subsequent transfer of the muon to the element of interest. Status and perspectives of the project will be presented.
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13
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Trassinelli M, Anagnostopoulos D, Borchert G, Dax A, Egger JP, Gotta D, Hennebach M, Indelicato P, Liu YW, Manil B, Nelms N, Simons L, Wells A. Measurement of the charged pion mass using a low-density target of light atoms. EPJ Web Conf 2016. [DOI: 10.1051/epjconf/201613001022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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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14
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Agustoni F, Fucà G, Corrao G, Vernieri C, Cavalieri S, Raimondi A, Peverelli G, Prisciandaro M, Indelicato P, Dotti K, Morano F, Russo G, Signorelli D, Proto C, Vitali M, Imbimbo M, Zilembo N, Garassino M, De Braud F, Platania M. Impact of hyponatremia in a tertiary cancer center: a one-year-survey at National Cancer Institute of Milan. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw390.37] [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: 11/13/2022] Open
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15
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Cavalieri S, Raimondi A, Morelli D, Martinetti A, de Braud F, Agustoni F, Dotti K, Galli G, Vernieri C, Fucà G, Peverelli G, Prisciandaro M, Nichetti F, Indelicato P, Lo Russo G, Prinzi N, Garassino M, Platania M. Pro-gastrin releasing peptide (pro-GRP) in small cell lung cancer staging. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw332.34] [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: 11/12/2022] Open
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16
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Agustoni F, Fucà G, Corrao G, Vernieri C, Cavalieri S, Raimondi A, Peverelli G, Prisciandaro M, Indelicato P, Lo Russo G, Signorelli D, Proto C, Vitali M, Imbimbo M, Zilembo N, Garassino M, Procopio G, de Braud F, Morelli D, Platania M. Impact of Hyponatremia in a Tertiary Cancer Center: a one-year-Survey at National Cancer Institute of Milan. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw345.19] [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: 11/13/2022] Open
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17
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Antognini A, Schuhmann K, Amaro FD, Amaro P, Abdou-Ahmed M, Biraben F, Chen TL, Covita DS, Dax AJ, Diepold M, Fernandes LMP, Franke B, Galtier S, Gouvea AL, Götzfried J, Graf T, Hänsch TW, Hildebrandt M, Indelicato P, Julien L, Kirch K, Knecht A, Kottmann F, Krauth JJ, Liu YW, Machado J, Monteiro CMB, Mulhauser F, Nez F, Santos JP, dos Santos JMF, Szabo CI, Taqqu D, Veloso JFCA, Voss A, Weichelt B, Pohl R. Experiments towards resolving the proton charge radius puzzle. EPJ Web of Conferences 2016. [DOI: 10.1051/epjconf/201611301006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [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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18
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Sampaio J, Madeira T, Parente F, Indelicato P, Santos J, Marques J. Relativistic calculations of M-shell photoionization and X-ray production cross-sections for Hg at 5.96keV excitation energy. Radiat Phys Chem Oxf Engl 1993 2015. [DOI: 10.1016/j.radphyschem.2014.09.006] [Citation(s) in RCA: 3] [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: 10/24/2022]
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19
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Kasthurirangan S, Saha JK, Agnihotri AN, Bhattacharyya S, Misra D, Kumar A, Mukherjee PK, Santos JP, Costa AM, Indelicato P, Mukherjee TK, Tribedi LC. Observation of 2p3d(1Po)→1s3d(1De) radiative transition in He-like Si, S, and Cl ions. Phys Rev Lett 2013; 111:243201. [PMID: 24483657 DOI: 10.1103/physrevlett.111.243201] [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: 09/05/2013] [Indexed: 06/03/2023]
Abstract
We present an experimental determination of the 2p3d(1Po)→1s3d(1De) x-ray line emitted from He-like Si, S, and Cl projectile ions, excited in collisions with thin carbon foils, using a high-resolution bent-crystal spectrometer. A good agreement between the observation and state-of-the-art relativistic calculations using the multiconfiguration Dirac-Fock formalism including the Breit interaction and QED effects implies the dominance of fluorescent decay over the autoionization process for the 2p3d(^{1}P^{o}) state of He-like heavy ions. This is the first observation of the fluorescence-active doubly excited states in He-like Si, S, and Cl ions.
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Affiliation(s)
- S Kasthurirangan
- Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Colaba, Mumbai 400005, India and Department of Physics, Institute of Chemical Technology, Mumbai 400019, India
| | - J K Saha
- Narula Institute of Technology, Agarpara, Kolkata 700109, India
| | - A N Agnihotri
- Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Colaba, Mumbai 400005, India
| | | | - D Misra
- Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Colaba, Mumbai 400005, India
| | - A Kumar
- Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - P K Mukherjee
- Ramakrishna Mission Vivekananda University, Howrah 711202, India
| | - J P Santos
- Centro de Física Atómica, Departamento de Física, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, P-2829-516 Caparica, Portugal
| | - A M Costa
- Centro de Física Atómica, Departamento de Física, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, P-2829-516 Caparica, Portugal
| | - P Indelicato
- Laboratoire Kastler Brossel, École Normale Supérieure, CNRS, Université P. et M. Curie-Paris 6, Case 74; 4, place Jussieu, 75252 Paris CEDEX 05, France
| | - T K Mukherjee
- Narula Institute of Technology, Agarpara, Kolkata 700109, India
| | - L C Tribedi
- Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Colaba, Mumbai 400005, India
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20
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Szabo C, Indelicato P, Hudson L, Seely J, Ma T. High-resolution K-shell spectra from laser excited molybdenum plasmas. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135913007] [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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21
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Antognini A, Nez F, Schuhmann K, Amaro FD, Biraben F, Cardoso JMR, Covita DS, Dax A, Dhawan S, Diepold M, Fernandes LMP, Giesen A, Gouvea AL, Graf T, Hansch TW, Indelicato P, Julien L, Kao CY, Knowles P, Kottmann F, Le Bigot EO, Liu YW, Lopes JAM, Ludhova L, Monteiro CMB, Mulhauser F, Nebel T, Rabinowitz P, dos Santos JMF, Schaller LA, Schwob C, Taqqu D, Veloso JFCA, Vogelsang J, Pohl R. Proton Structure from the Measurement of 2S-2P Transition Frequencies of Muonic Hydrogen. Science 2013; 339:417-20. [DOI: 10.1126/science.1230016] [Citation(s) in RCA: 581] [Impact Index Per Article: 52.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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22
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Nez F, Antognini A, Amaro FD, Biraben F, Cardoso JMR, Covita D, Dax A, Dhawan S, Fernandes L, Giesen A, Graf T, Hänsch TW, Indelicato P, Julien L, Kao CY, Knowles PE, Le Bigot E, Liu YW, Lopes JAM, Ludhova L, Monteiro CMB, Mulhauser F, Nebel T, Rabinowitz P, dos Santos JMF, Schaller L, Schuhmann K, Schwob C, Taqqu D, Veloso JFCA, Kottmann F, Pohl R. Is the proton radius a player in the redefinition of the International System of Units? Philos Trans A Math Phys Eng Sci 2011; 369:4064-4077. [PMID: 21930565 DOI: 10.1098/rsta.2011.0233] [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] [Indexed: 05/31/2023]
Abstract
It is now recognized that the International System of Units (SI units) will be redefined in terms of fundamental constants, even if the date when this will occur is still under debate. Actually, the best estimate of fundamental constant values is given by a least-squares adjustment, carried out under the auspices of the Committee on Data for Science and Technology (CODATA) Task Group on Fundamental Constants. This adjustment provides a significant measure of the correctness and overall consistency of the basic theories and experimental methods of physics using the values of the constants obtained from widely differing experiments. The physical theories that underlie this adjustment are assumed to be valid, such as quantum electrodynamics (QED). Testing QED, one of the most precise theories is the aim of many accurate experiments. The calculations and the corresponding experiments can be carried out either on a boundless system, such as the electron magnetic moment anomaly, or on a bound system, such as atomic hydrogen. The value of fundamental constants can be deduced from the comparison of theory and experiment. For example, using QED calculations, the value of the fine structure constant given by the CODATA is mainly inferred from the measurement of the electron magnetic moment anomaly carried out by Gabrielse's group. (Hanneke et al. 2008 Phys. Rev. Lett. 100, 120801) The value of the Rydberg constant is known from two-photon spectroscopy of hydrogen combined with accurate theoretical quantities. The Rydberg constant, determined by the comparison of theory and experiment using atomic hydrogen, is known with a relative uncertainty of 6.6×10(-12). It is one of the most accurate fundamental constants to date. A careful analysis shows that knowledge of the electrical size of the proton is nowadays a limitation in this comparison. The aim of muonic hydrogen spectroscopy was to obtain an accurate value of the proton charge radius. However, the value deduced from this experiment contradicts other less accurate determinations. This problem is known as the proton radius puzzle. This new determination of the proton radius may affect the value of the Rydberg constant . This constant is related to many fundamental constants; in particular, links the two possible ways proposed for the redefinition of the kilogram, the Avogadro constant N(A) and the Planck constant h. However, the current relative uncertainty on the experimental determinations of N(A) or h is three orders of magnitude larger than the 'possible' shift of the Rydberg constant, which may be shown by the new value of the size of the proton radius determined from muonic hydrogen. The proton radius puzzle will not interfere in the redefinition of the kilogram. After a short introduction to the properties of the proton, we will describe the muonic hydrogen experiment. There is intense theoretical activity as a result of our observation. A brief summary of possible theoretical explanations at the date of writing of the paper will be given. The contribution of the proton radius puzzle to the redefinition of SI-based units will then be examined.
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Affiliation(s)
- F Nez
- Laboratoire Kastler Brossel, ENS, UPMC and CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France.
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23
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Strauch T, Amaro F, Anagnostopoulos D, Bühler P, Covita D, Gorke H, Gotta D, Gruber A, Hirtl A, Indelicato P, Le Bigot EO, Nekipelov M, dos Santos J, Schmid P, Schlesser S, Simons L, Trassinelli M, Veloso J, Zmeskal J. Pionic Deuterium. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100303006] [Citation(s) in RCA: 2] [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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Strauch T, Amaro FD, Anagnostopoulos DF, Bühler P, Covita DS, Gorke H, Gotta D, Gruber A, Hirtl A, Indelicato P, Le Bigot EO, Nekipelov M, dos Santos JMF, Schlesser S, Schmid P, Simons LM, Trassinelli M, Veloso JFCA, Zmeskal J. Precision determination of the dpi<-->NN transition strength at threshold. Phys Rev Lett 2010; 104:142503. [PMID: 20481936 DOI: 10.1103/physrevlett.104.142503] [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: 01/13/2010] [Indexed: 05/29/2023]
Abstract
An unusual but effective way to determine at threshold the dpi<-->NN transition strength alpha is to exploit the hadronic ground-state broadening Gamma(1s) in pionic deuterium, accessible by x-ray spectroscopy. The broadening is dominated by the true absorption channel dpi(-)-->nn, which is related to s-wave pion production pp-->dpi(+) by charge symmetry and detailed balance. Using the exotic atom circumvents the problem of Coulomb corrections to the cross section as necessary in the production experiments. Our dedicated measurement finds Gamma(1s)=(1171(-49)(+23)) meV yielding alpha=(252(-11)(+5)) microb.
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Affiliation(s)
- Th Strauch
- Institut für Kernphysik, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
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25
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Gumberidze A, Trassinelli M, Adrouche N, Szabo CI, Indelicato P, Haranger F, Isac JM, Lamour E, Le Bigot EO, Mérot J, Prigent C, Rozet JP, Vernhet D. Electronic temperatures, densities, and plasma x-ray emission of a 14.5 GHz electron-cyclotron resonance ion source. Rev Sci Instrum 2010; 81:033303. [PMID: 20370166 DOI: 10.1063/1.3316805] [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] [Indexed: 05/22/2023]
Abstract
We have performed a systematic study of the bremsstrahlung emission from the electrons in the plasma of a commercial 14.5 GHz electron-cyclotron resonance ion source. The electronic spectral temperature and the product of ionic and electronic densities of the plasma are measured by analyzing the bremsstrahlung spectra recorded for several rare gases (Ar, Kr, and Xe) as a function of the injected power. Within our uncertainty, we find an average temperature of approximately 48 keV above 100 W, with a weak dependency on the injected power and gas composition. Charge state distributions of extracted ion beams have been determined as well, providing a way to disentangle the ionic density from the electronic density. Moreover x-ray emission from highly charged argon ions in the plasma has been observed with a high-resolution mosaic-crystal spectrometer, demonstrating the feasibility for high-precision measurements of transition energies of highly charged ions, in particular, of the magnetic dipole (M1) transition of He-like of argon ions.
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Affiliation(s)
- A Gumberidze
- Laboratoire Kastler Brossel, Ecole Normale Supérieure, CNRS, Université Pierre et Marie Curie-Paris 6 Case 74, 4, Place Jussieu, 75252 Paris Cedex 05, France
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26
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Covita DS, Anagnostopoulos DF, Gorke H, Gotta D, Gruber A, Hirtl A, Ishiwatari T, Indelicato P, Le Bigot EO, Nekipelov M, Dos Santos JMF, Schmid P, Simons LM, Trassinelli M, Veloso JFCA, Zmeskal J. Line shape of the microH(3p-1s) hyperfine transitions. Phys Rev Lett 2009; 102:023401. [PMID: 19257271 DOI: 10.1103/physrevlett.102.023401] [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: 10/06/2008] [Indexed: 05/27/2023]
Abstract
The (3p-1s) x-ray transition to the muonic hydrogen ground state was measured with a high-resolution crystal spectrometer. A Doppler effect broadening of the x-ray line was established which could be attributed to different Coulomb deexcitation steps preceding the measured transition. The assumption of a statistical population of the hyperfine levels of the muonic hydrogen ground state was directly confirmed by the experiment, and measured values for the hyperfine splitting can be reported. The results allow a decisive test of advanced cascade model calculations and establish a method to extract fundamental strong-interaction parameters from pionic hydrogen experiments.
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Affiliation(s)
- D S Covita
- Department of Physics, Coimbra University, P-3000 Coimbra, Portugal
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Gotta D, Amaro F, Anagnostopoulos DF, Biri S, Covita DS, Gorke H, Gruber A, Hennebach M, Hirtl A, Ishiwatari T, Indelicato P, Jensen T, Bigot EOL, Marton J, Nekipelov M, dos Santos JMF, Schlesser S, Schmid P, Simons LM, Strauch T, Trassinelli M, Veloso JFCA, Zmeskal J. Pionic Hydrogen. Precision Physics of Simple Atoms and Molecules 2008. [DOI: 10.1007/978-3-540-75479-4_10] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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28
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Indelicato P, Trassinelli M, Anagnostopoulos D, Boucard S, Covita D, Borchert G, Dax A, Egger J, Gotta D, Gruber A, Hirtl A, Hennebach M, Fuhrmann H, Le Bigot EO, Liu YW, Manil B, Nelms N, Schlesser S, dos Santos J, Simons L, Stingelin L, Veloso J, Wasser A, Wells A, Zmeskal J. Chapter 11 Experiments on Highly Charged Heavy Ions in Conjunction with Exotic Atoms. Current Trends in Atomic Physics 2008. [DOI: 10.1016/s0065-3276(07)53011-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Borgoo A, Godefroid M, Indelicato P, De Proft F, Geerlings P. Quantum similarity study of atomic density functions: Insights from information theory and the role of relativistic effects. J Chem Phys 2007; 126:044102. [PMID: 17286457 DOI: 10.1063/1.2428295] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A novel quantum similarity measure (QSM) is constructed based on concepts from information theory. In an application of QSM to atoms, the new QSM and its corresponding quantum similarity index (QSI) are evaluated throughout the periodic table, using the atomic electron densities and shape functions calculated in the Hartree-Fock approximation. The periodicity of Mendeleev's table is regained for the first time through the evaluation of a QSM. Evaluation of the information theory based QSI demonstrates, however, that the patterns of periodicity are lost due to the renormalization of the QSM, yielding chemically less appealing results for the QSI. A comparison of the information content of a given atom on top of a group with the information content of the elements in the subsequent rows reveals another periodicity pattern. Relativistic effects on the electronic density functions of atoms are investigated. Their importance is quantified in a QSI study by comparing for each atom, the density functions evaluated in the Hartree-Fock and Dirac-Fock approximations. The smooth decreasing of the relevant QSI along the periodic table illustrates in a quantitative way the increase of relativistic corrections with the nuclear charge.
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Affiliation(s)
- A Borgoo
- Departement of General Chemistry (ALGC), Vrije Universiteit Brussel (Free University of Brussel VUB), Pleinlaan 2, 1050 Brussels, Belgium
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30
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31
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Yerokhin VA, Indelicato P, Shabaev VM. Nonperturbative calculation of the two-loop lamb shift in Li-like ions. Phys Rev Lett 2006; 97:253004. [PMID: 17280349 DOI: 10.1103/physrevlett.97.253004] [Citation(s) in RCA: 9] [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: 06/23/2006] [Revised: 11/07/2006] [Indexed: 05/13/2023]
Abstract
A calculation valid to all orders in the nuclear-strength parameter is presented for the two-loop Lamb shift, notably for the two-loop self-energy correction, to the 2p-2s transition energies in heavy Li-like ions. The calculation removes the largest theoretical uncertainty for these transitions and yields the first experimental identification of two-loop QED effects in the region of the strong binding field.
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Affiliation(s)
- V A Yerokhin
- Center for Advanced Studies, St. Petersburg State Polytechnical University, Polytekhnicheskaya 29, St. Petersburg 195251, Russia
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32
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Schuch R, Lindroth E, Madzunkov S, Fogle M, Mohamed T, Indelicato P. Dielectronic resonance method for measuring isotope shifts. Phys Rev Lett 2005; 95:183003. [PMID: 16383901 DOI: 10.1103/physrevlett.95.183003] [Citation(s) in RCA: 2] [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: 02/28/2005] [Indexed: 05/05/2023]
Abstract
Long standing problems in the comparison of very accurate hyperfine-shift measurements to theory were partly overcome by precise measurements on few-electron highly charged ions. Still the agreement between theory and experiment is unsatisfactory. In this Letter, we present a radically new way of precisely measuring hyperfine shifts, and demonstrate its effectiveness in the case of the hyperfine shift of 4s1/2 and 4p1/2 in 207Pb53+. It is based on the precise detection of dielectronic resonances that occur in electron-ion recombination at very low energy. This allows us to determine the hyperfine constant to around 0.6 meV accuracy which is on the order of 10%.
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Affiliation(s)
- R Schuch
- Atomic Physics, Stockholm University, AlbaNova, S-106 91 Stockholm, Sweden
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33
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Indelicato P, Lindroth E, Desclaux JP. Nonrelativistic limit of Dirac-Fock codes: the role of Brillouin configurations. Phys Rev Lett 2005; 94:013002. [PMID: 15698076 DOI: 10.1103/physrevlett.94.013002] [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: 08/10/2004] [Indexed: 05/24/2023]
Abstract
We solve a long standing problem with relativistic calculations done with the widely used multiconfiguration Dirac-Fock method. We show, using relativistic many-body perturbation theory (RMBPT), how, even for relatively high-Z, relaxation or correlation causes the nonrelativistic limit of states of different total angular momentum but identical orbital angular momentum to have different energies. We show that only large scale calculations that include all single excitations, even those obeying Brillouin's theorem, have the correct limit. We reproduce very accurately recent high-precision measurements in F-like Ar, and turn then to a precise test of QED. We obtain the correct nonrelativistic limit not only for fine structure but also for level energies and show that RMBPT calculations are not immune to this problem.
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Affiliation(s)
- P Indelicato
- Laboratoire Kastler Brossel, E'ole Normale Supérieure et Université Pierre et Marie Curie, Case 74, 4 place Jussieu, F-75252, Cedex 05, France.
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Anagnostopoulos DF, Gotta D, Indelicato P, Simons LM. Low-energy X-ray standards from hydrogenlike pionic atoms. Phys Rev Lett 2003; 91:240801. [PMID: 14683102 DOI: 10.1103/physrevlett.91.240801] [Citation(s) in RCA: 6] [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: 06/26/2002] [Indexed: 05/24/2023]
Abstract
We demonstrate the first step of a complete program, which consists in establishing an x-ray energy standard scale with the use of few-body atoms, in the few keV range. Light pionic and muonic atoms as well as one and two-electron ions from electron-cyclotron ion sources are used. The transition energies are calculable from quantum-electrodynamics, meaning that only a very limited subset need be measured and compared with theory, while providing a large number of standard lines. Here we show that circular transitions in pionic neon atoms, completely stripped from their electrons, reveal spectral lines which are narrow, symmetric, and well reproducible. We use these lines for the energy determination of transition energies in complex electronic systems, like the Kalpha(1,2) transitions in metallic Ti, which may serve as secondary standard.
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Affiliation(s)
- D F Anagnostopoulos
- Department of Materials Science and Engineering, University of Ioannina, GR-45110 Ioannina, Greece
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35
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Abstract
A complete evaluation of the two-loop self-energy diagrams to all orders in Zalpha is presented for the ground state of H-like ions with Z > or =40.
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Affiliation(s)
- V A Yerokhin
- Department of Physics, St. Petersburg State University, Oulianovskaya 1, St. Petersburg 198504, Russia
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36
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Yerokhin VA, Indelicato P, Shabaev VM. Self-energy correction to the bound-electron g factor in H-like ions. Phys Rev Lett 2002; 89:143001. [PMID: 12366041 DOI: 10.1103/physrevlett.89.143001] [Citation(s) in RCA: 4] [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: 05/22/2002] [Indexed: 05/23/2023]
Abstract
The one-loop self-energy correction to the 1s-electron g factor is evaluated to all orders in Zalpha with an accuracy essentially better than that of previous calculations of this correction. As a result, the uncertainty of the theoretical prediction for the bound-electron g factor in H-like carbon is reduced by a factor of 3. This improves the total accuracy of the recent electron-mass determination [T. Beier, Phys. Rev. Lett. 88, 011603 (2002)]]. The new value of the electron mass is found to be m(e)=0.000 548 579 909 3 (3) u.
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Affiliation(s)
- V A Yerokhin
- Laboratoire Kastler-Brossel, Ecole Normale Supérieure et Université Pierre et Marie Curie, Case 74, 4 place Jussieu, F-75252, Cedex 05, France
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37
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Siems T, Anagnostopoulos DF, Borchert G, Gotta D, Hauser P, Kirch K, Simons LM, El-Khoury P, Indelicato P, Augsburger M, Chatellard D, Egger J. First direct observation of coulomb explosion during the formation of exotic atoms. Phys Rev Lett 2000; 84:4573-4576. [PMID: 10990743 DOI: 10.1103/physrevlett.84.4573] [Citation(s) in RCA: 4] [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: 11/24/1999] [Indexed: 05/23/2023]
Abstract
A Doppler broadening of x-ray transitions from pionic nitrogen and muonic oxygen, which is attributed to Coulomb explosion of the molecules, has been observed by using a crystal spectrometer. Large linewidths indicate fast ionization of the molecules and a charge of (3-4)e for the accelerated fragments.
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Affiliation(s)
- T Siems
- Institut fur Kernphysik, Forschungszentrum Julich, D-52425 Julich, Germany
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38
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Collins MW, Grindel SH, Lovell MR, Dede DE, Moser DJ, Phalin BR, Nogle S, Wasik M, Cordry D, Daugherty KM, Sears SF, Nicolette G, Indelicato P, McKeag DB. Relationship between concussion and neuropsychological performance in college football players. JAMA 1999; 282:964-70. [PMID: 10485682 DOI: 10.1001/jama.282.10.964] [Citation(s) in RCA: 582] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
CONTEXT Despite the high prevalence and potentially serious outcomes associated with concussion in athletes, there is little systematic research examining risk factors and short- and long-term outcomes. OBJECTIVES To assess the relationship between concussion history and learning disability (LD) and the association of these variables with neuropsychological performance and to evaluate postconcussion recovery in a sample of college football players. DESIGN, SETTING, AND PARTICIPANTS A total of 393 athletes from 4 university football programs across the United States received preseason baseline evaluations between May 1997 and February 1999. Subjects who had subsequent football-related acute concussions (n = 16) underwent neuropsychological comparison with matched control athletes from within the sample (n = 10). MAIN OUTCOME MEASURES Clinical interview, 8 neuropsychological measures, and concussion symptom scale ratings at baseline and after concussion. RESULTS Of the 393 players, 129 (34%) had experienced 1 previous concussion and 79 (20%) had experienced 2 or more concussions. Multivariate analysis of variance yielded significant main effects for both LD (P<.001) and concussion history (P=.009), resulting in lowered baseline neuropsychological performance. A significant interaction was found between LD and history of multiple concussions and LD on 2 neuropsychological measures (Trail-Making Test, Form B [P=.007] and Symbol Digit Modalities Test [P=.009]), indicating poorer performance for the group with LD and multiple concussions compared with other groups. A discriminant function analysis using neuropsychological testing of athletes 24 hours after acute in-season concussion compared with controls resulted in an overall 89.5% correct classification rate. CONCLUSIONS Our study suggests that neuropsychological assessment is a useful indicator of cognitive functioning in athletes and that both history of multiple concussions and LD are associated with reduced cognitive performance. These variables may be detrimentally synergistic and should receive further study.
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Affiliation(s)
- M W Collins
- Department of Behavioral Health, Henry Ford Health System, Detroit, Mich 48202, USA.
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39
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Indelicato P, Gorveix O, Desclaux JP. Multiconfigurational Dirac-Fock studies of two-electron ions. II. Radiative corrections and comparison with experiment. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/20/4/007] [Citation(s) in RCA: 216] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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40
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42
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Gorceix O, Indelicato P, Desclaux JP. Multiconfiguration Dirac-Fock studies of two-electron ions. I. Electron-electron interaction. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/20/4/006] [Citation(s) in RCA: 102] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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43
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Indelicato P. Correlation and Negative Continuum Effects for the Relativistic M1 Transition in Two-Electron Ions using the Multiconfiguration Dirac-Fock Method. Phys Rev Lett 1996; 77:3323-3326. [PMID: 10062191 DOI: 10.1103/physrevlett.77.3323] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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44
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Maul M, Schäfer A, Greiner W, Indelicato P. Prospects for parity-nonconservation experiments with highly charged heavy ions. Phys Rev A 1996; 53:3915-3925. [PMID: 9913353 DOI: 10.1103/physreva.53.3915] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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45
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Indelicato P. Projection operators in multiconfiguration Dirac-Fock calculations: Application to the ground state of heliumlike ions. Phys Rev A 1995; 51:1132-1145. [PMID: 9911693 DOI: 10.1103/physreva.51.1132] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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46
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Simionovici A, Birkett BB, Marrus R, Charles P, Indelicato P, Dietrich DD, Finlayson K. Cascade-free Doppler-tuned precision measurement of the lifetime of the 2 (3)S1 state in He-like niobium (93Nb39+). Phys Rev A 1994; 49:3553-3556. [PMID: 9910653 DOI: 10.1103/physreva.49.3553] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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47
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Suleiman J, Berry HG, Dunford RW, Deslattes RD, Indelicato P. Observations of doubly excited states in lithiumlike calcium. Phys Rev A 1994; 49:156-160. [PMID: 9910216 DOI: 10.1103/physreva.49.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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48
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Simionovici A, Birkett BB, Briand JP, Charles P, Dietrich DD, Finlayson K, Indelicato P, Liesen D, Marrus R. n=2 to n=1 forbidden transitions in H-like and He-like silver and niobium. Phys Rev A 1993; 48:1695-1698. [PMID: 9909774 DOI: 10.1103/physreva.48.1695] [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] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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49
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Birkett BB, Briand JP, Charles P, Dietrich DD, Finlayson K, Indelicato P, Liesen D, Marrus R, Simionovici A. Hyperfine quenching and measurement of the 2 (3)P0-2 (3)P1 fine-structure splitting in heliumlike silver (Ag45+). Phys Rev A 1993; 47:R2454-R2457. [PMID: 9909345 DOI: 10.1103/physreva.47.r2454] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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50
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Marques JP, Parente F, Indelicato P. Hyperfine quenching of the 1s22s2p 3P0 level in berylliumlike ions. Phys Rev A 1993; 47:929-935. [PMID: 9909013 DOI: 10.1103/physreva.47.929] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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