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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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Valiente-Dobón JJ, Steinhardt T, Svensson CE, Afanasjev AV, Ragnarsson I, Andreoiu C, Austin RAE, Carpenter MP, Dashdorj D, de Angelis G, Dönau F, Eberth J, Farnea E, Freeman SJ, Gadea A, Garrett PE, Görgen A, Grinyer GF, Hyland B, Jenkins D, Johnston-Theasby F, Joshi P, Jungclaus A, Lieb KP, Macchiavelli AO, Moore EF, Mukherjee G, Napoli DR, Phillips AA, Plettner C, Reviol W, Sarantites D, Schnare H, Schumaker MA, Schwengner R, Seweryniak D, Smith MB, Stefanescu I, Thelen O, Wadsworth R. Evidence for nontermination of rotational bands in 74Kr. Phys Rev Lett 2005; 95:232501. [PMID: 16384300 DOI: 10.1103/physrevlett.95.232501] [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: 07/18/2005] [Indexed: 05/05/2023]
Abstract
Three rotational bands in 74Kr were studied up to (in one case one transition short of) the maximum spin I(max) of their respective single-particle configurations. Their lifetimes have been determined using the Doppler-shift attenuation method. The deduced transition quadrupole moments reveal a modest decrease, but far from a complete loss of collectivity at the maximum spin I(max). This feature, together with the results of mean field calculations, indicates that the observed bands do not terminate at I = I(max).
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Affiliation(s)
- J J Valiente-Dobón
- Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
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Laird RW, Kondev FG, Riley MA, Archer DE, Brown TB, Clark RM, Devlin M, Fallon P, Hartley DJ, Hibbert IM, Joss DT, LaFosse DR, Nolan PJ, O'Brien NJ, Paul ES, Pfohl J, Sarantites DG, Sheline RK, Shepherd SL, Simpson J, Wadsworth R, Matev MT, Afanasjev AV, Dobaczewski J, Lalazissis GA, Nazarewicz W, Satuła W. Quadrupole moments of highly deformed structures in the A approximately 135 region: probing the single-particle motion in a rotating potential. Phys Rev Lett 2002; 88:152501. [PMID: 11955192 DOI: 10.1103/physrevlett.88.152501] [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: 10/29/2001] [Indexed: 05/23/2023]
Abstract
The latest generation gamma-ray detection system, GAMMASPHERE, coupled with the Microball charged-particle detector, has made possible a new class of nuclear lifetime measurement. For the first time differential lifetime measurements free from common systematic errors for over 15 different nuclei ( >30 rotational bands in various isotopes of Ce, Pr, Nd, Pm, and Sm) have been extracted at high spin within a single experiment. This comprehensive study establishes the effective single-particle transition quadrupole moments in the A approximately 135 light rare-earth region. Detailed comparisons are made with theoretical calculations using the self-consistent cranked mean-field theory which convincingly demonstrates the validity of the additivity of single-particle quadrupole moments in this mass region.
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Affiliation(s)
- R W Laird
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
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