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作者机构:Dipartimento di Fisica e Astronomia Università di Padova I-35131 Padova Italy Istituto Nazionale di Fisica Nucleare Sezione di Padova I-35131 Padova Italy Istituto Nazionale di Fisica Nucleare Laboratori Nazionali di Legnaro I-35020 Legnaro Italy Instituto de Física Corpuscular CSIC-Universitat de València E-46980 València Spain School of Physics and Astronomy University of Birmingham Edgbaston Birmingham B15 2TT United Kingdom Institut für Kernphysik Technische Universität Darmstadt D-64289 Darmstadt Germany Departamento de Física Teórica Universidad Autónoma de Madrid E-28049 Madrid Spain Department of Physics University of Surrey GU2 7XH Guildford United Kingdom Dipartimento di Fisica Università di Milano I-20133 Milano Italy Istituto Nazionale di Fisica Nucleare Sezione di Milano I-20133 Milano Italy Institut für Kernphysik Universität zu Köln D-50937 Köln Germany Dipartimento di Fisica Università di Firenze I-50019 Sesto Fiorentino (Firenze) Italy Istituto Nazionale di Fisica Nucleare Sezione di Firenze I-50019 Sesto Fiorentino (Firenze) Italy School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4GJ United Kingdom Institut de Recherche sur les lois Fondamentales de l'Univers IRFU CEA/DSM Centre CEA de Saclay F-91191 Gif-sur-Yvette Cedex France Department of Physics Faculty of Science Istanbul University Vezneciler/Fatih TR-34134 İstanbul Turkey ELI-NP Horia Hulubei National Institute of Physics and Nuclear Engineering 077125 Magurele Romania Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse CSNSM CNRS/IN2P3 and Université Paris-Sud F-91405 Orsay Campus France Institut Ruder Bošković HR-10000 Zagreb Croatia Dipartimento di Fisica Teorica Università di Torino I-10125 Torino Italy Istituto Nazionale di Fisica Nucleare Sezione di Torino I-10125 Torino Italy Département de Physique Université libre de Bruxelles B-1050 Bruxelles Belgium Department of Physics and Astronomy Uppsala University SE-75120 Uppsala Sweden
出 版 物:《Physical Review C》 (物理学评论C辑:核物理学)
年 卷 期:2017年第95卷第6期
页 面:064321-064321页
核心收录:
学科分类:07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学]
基 金:European Commission, EC Seventh Framework Programme, FP7 Science and Technology Facilities Council, STFC, (ST/L005751/1) Science and Technology Facilities Council, STFC Ministerstwo Nauki i Szkolnictwa Wyższego, MNiSW, (DPN/N190/AGATA/2009) Ministerstwo Nauki i Szkolnictwa Wyższego, MNiSW Istanbul Üniversitesi, (15539) Istanbul Üniversitesi Generalitat Valenciana, Spain, (PROMETEO/2010/101) Bundesministerium für Bildung und Forschung, BMBF, (06DA7047I, 05P12PKFNE) Bundesministerium für Bildung und Forschung, BMBF Ministerio de Economía y Competitividad, MINECO, (FPA-2011-29854-C04-01, FPA2011-29854, AIC-D-2011-0746, FIS2014-53434-P, CSD2007-00042) Ministerio de Economía y Competitividad, MINECO Seventh Framework Programme, FP7, (262010) Seventh Framework Programme, FP7 Japan Society for the Promotion of Science, JSPS, (16F16323) Japan Society for the Promotion of Science, JSPS
主 题:Collective levels Electromagnetic transitions Energy levels & level densities Low & intermediate energy heavy-ion reactions Nuclear charge distribution Nuclear structure & decays Transfer reactions 190 ≤ A ≤ 219
摘 要:The neutron-rich nucleus Pt200 is investigated via in-beam γ-ray spectroscopy to study the shape evolution in the neutron-rich platinum isotopes towards the N=126 shell closure. The two-neutron transfer reaction Pt198(Se82, Se80)Pt200 is used to populate excited states of Pt200. The Advanced Gamma Ray Tracking Array (AGATA) demonstrator coupled with the PRISMA spectrometer detects γ rays coincident with the Se80 recoils, the binary partner of Pt200. The binary partner method is applied to extract the γ-ray transitions and build the level scheme of Pt200. The level at 1884 keV reported by Yates et al. [S. W. Yates, E. M. Baum, E. A. Henry, L. G. Mann, N. Roy, A. Aprahamian, R. A. Meyer, and R. Estep, Phys. Rev. C 37, 1889 (1988)] was confirmed to be at 1882.1 keV and assigned as the (61+) state. An additional γ ray was found and it presumably deexcites the (81+) state. The results are compared with state-of-the-art beyond mean-field calculations, performed for the even-even 190−204Pt isotopes, revealing that Pt200 marks the transition from the γ-unstable behavior of lighter Pt nuclei towards a more spherical one when approaching the N=126 shell closure.