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In-beam γ-ray spectroscopy of the neutron-rich platinum isotope Pt200 toward the N=126 shell gap

作     者:P. R. John J. J. Valiente-Dobón D. Mengoni V. Modamio S. Lunardi D. Bazzacco A. Gadea C. Wheldon T. R. Rodríguez T. Alexander G. de Angelis N. Ashwood M. Barr G. Benzoni B. Birkenbach P. G. Bizzeti A. M. Bizzeti-Sona S. Bottoni M. Bowry A. Bracco F. Browne M. Bunce F. Camera L. Corradi F. C. L. Crespi B. Melon E. Farnea E. Fioretto A. Gottardo L. Grente H. Hess Tz. Kokalova W. Korten A. Kuşoğlu S. Lenzi S. Leoni J. Ljungvall R. Menegazzo C. Michelagnoli T. Mijatović G. Montagnoli D. Montanari D. R. Napoli Zs. Podolyák G. Pollarolo F. Recchia P. Reiter O. J. Roberts E. Şahin M.-D. Salsac F. Scarlassara M. Sferrazza P.-A. Söderström A. M. Stefanini S. Szilner C. A. Ur A. Vogt J. Walshe 

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.

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