High-resolution spectroscopy of neutron-rich Br isotopes and signatures for a prolate-to-oblate shape transition at N=56

J. Dudouet; G. Colombi; D. Reygadas Tello; C. Michelagnoli; D. D. Dao; F. Nowacki; M. Abushawish; E. Clément; C. Costache; G. Duchêne; F. Kandzia; A. Lemasson; N. Marginean; R. Marginean; C. Mihai; S. Pascu; M. Rejmund; K. Rezynkina; O. Stezowski; A. Turturica; S. Ujeniuc; A. Astier; G. de Angelis; G. de France; C. Delafosse; I. Deloncle; A. Gadea; A. Gottardo; P. Jones; T. Konstantinopoulos; I. Kuti; F. Le Blanc; S. M. Lenzi; R. Lozeva; B. Million; R. M. Pérez-Vidal; C. M. Petrache; D. Ralet; N. Redon; C. Schmitt; D. Sohler; D. Verney

doi:10.1103/physrevc.110.034304

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arXiv · 2405.15601

High-resolution spectroscopy of neutron-rich Br isotopes and signatures for a prolate-to-oblate shape transition at N=56

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Abstract

The first systematic experimental study of the neutron-rich Br isotopes with two complementary state-of-the-art techniques is presented. These isotopes have been populated in the fission process at two different facilities, GANIL and ILL. New spectroscopic information has been obtained for odd-even $^{87-93}$Br isotopes and the experimental results have been compared with state-of-the-art Large-Scale Shell-Model and DNO Shell-Model calculations. As a result of such theoretical approaches, a transition from prolate ($^{87,89}$Br) to oblate ($^{91,93}$Br) shapes is obtained from the subtle balance between proton and neutron quadrupole deformations, as a clear signature of pseudo-SU3 quadrupole regime.

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J. Dudouet, G. Colombi, D. Reygadas Tello, C. Michelagnoli, D. D. Dao, F. Nowacki, M. Abushawish, E. Clément, C. Costache, G. Duchêne, F. Kandzia, A. Lemasson, N. Marginean, R. Marginean, C. Mihai, S. Pascu, M. Rejmund, K. Rezynkina, O. Stezowski, A. Turturica, S. Ujeniuc, A. Astier, G. de Angelis, G. de France, C. Delafosse, I. Deloncle, A. Gadea, A. Gottardo, P. Jones, T. Konstantinopoulos, I. Kuti, F. Le Blanc, S. M. Lenzi, R. Lozeva, B. Million, R. M. Pérez-Vidal, C. M. Petrache, D. Ralet, N. Redon, C. Schmitt, D. Sohler, D. Verney. 2024-05-24. High-resolution spectroscopy of neutron-rich Br isotopes and signatures for a prolate-to-oblate shape transition at N=56. https://doi.org/10.1103/physrevc.110.034304

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