In-beam γ -ray spectroscopy of the neutron-rich platinum isotope Pt 200 toward the N=126 shell gap

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Authors

  • P. R. John
  • J. J. Valiente-Dobón
  • D. Mengoni
  • V. Modamio
  • S. Lunardi
  • D. Bazzacco
  • A. Gadea
  • T. R. Rodríguez
  • T. Alexander
  • G. De Angelis
  • 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
  • W. Korten
  • A. Kuşoǧlu
  • 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

Colleges, School and Institutes

External organisations

  • Technische Universitat Darmstadt
  • Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova), Italy
  • Department of Physics and Astronomy and INFN
  • University of Oslo
  • Fundació General de la Universitat de Valencia (FGUV)
  • Universidad Autónoma de Madrid
  • University of Surrey
  • University of Cologne
  • Argonne National Laboratory
  • University of Brighton
  • IN2P3
  • Institut de Recherche sur les Lois Fondamentales de l'Univers
  • Horia Hulubei National Institute of Physics and Nuclear Engineering
  • Grand Accélérateur National d'Ions Lourds
  • Institut Ruder Boković
  • University of York
  • Université Libre de Bruxelles
  • RIKEN
  • Extreme Light Infrastructure Nuclear Physics Facility

Abstract

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.

Details

Original languageEnglish
Article number064321
JournalPhysical Review C
Volume95
Issue number6
Publication statusPublished - 22 Jun 2017

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