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Shape evolution in self-conjugate nuclei, and the transitional nucleus Se68

A. Obertelli, T. Baugher, D. Bazin, J. -P. Delaroche, F. Flavigny, A. Gade, M. Girod, T. Glasmacher, A. Goergen, G. F. Grinyer, W. Korten, J. Ljungvall, S. McDaniel, A. Ratkiewicz, B. Sulignano, and D. Weisshaar
Phys. Rev. C 80, 031304(R) – Published 25 September 2009

Abstract

We report on the first measurement of the absolute transition strength B(E2;01+21+) in the self-conjugate nucleus Se68. It is found that the 01+21+ transition displays a strength similar to that for the triaxial Ge64 nucleus, in sharp contrast to the much stronger collectivity observed for the oblate Kr72 nucleus. Shape evolution along the N=Z line from zinc to strontium is analyzed through beyond-mean-field calculations using the D1S force. Over this narrow mass region the nuclear structure shows clear-cut transition from prolate to oblate and back to prolate, with Se68 standing as pivotal between triaxial and oblate deformations.

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  • Received 17 July 2009

DOI:https://doi.org/10.1103/PhysRevC.80.031304

©2009 American Physical Society

Authors & Affiliations

A. Obertelli1, T. Baugher2, D. Bazin2, J. -P. Delaroche3, F. Flavigny1, A. Gade2,4, M. Girod3, T. Glasmacher2,4, A. Goergen1, G. F. Grinyer2, W. Korten2, J. Ljungvall1, S. McDaniel2,4, A. Ratkiewicz2,4, B. Sulignano1, and D. Weisshaar2

  • 1CEA, Centre de Saclay, IRFU/Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
  • 2National Superconducting Cyclotron Laboratory, East Lansing, USA
  • 3CEA, DAM, DIF, F-91297 Arpajon, France
  • 4Michigan State University, East Lansing, USA

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Issue

Vol. 80, Iss. 3 — September 2009

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