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Article Dans Une Revue Physical Review C Année : 2018

Deformed band structures in neutron-rich $^{152-158}$Pm isotopes

S. Bhattacharyya
  • Fonction : Auteur
E.H. Wang
  • Fonction : Auteur
J.H. Hamilton
  • Fonction : Auteur
A.V. Ramayya
  • Fonction : Auteur
J.K. Hwang
  • Fonction : Auteur
A.V. Afanasjev
  • Fonction : Auteur
Soumik Bhattacharya
  • Fonction : Auteur
J. Ranger
  • Fonction : Auteur
M. Caamaño
  • Fonction : Auteur
F. Farget
Y.X. Luo
  • Fonction : Auteur
Yu. Ts. Oganessian
  • Fonction : Auteur
J.O. Rasmussen
  • Fonction : Auteur
G.M. Ter-Akopian
  • Fonction : Auteur
S.J. Zhu
  • Fonction : Auteur

Résumé

High spin band structures of neutron-rich Pm152–158 isotopes have been obtained from the measurement of prompt γ rays of isotopically identified fragments produced in fission of U238+Be9 and detected using the VAMOS++ magnetic spectrometer and EXOGAM segmented Clover array at GANIL and also from the high statistics γ-γ-γ and γ-γ-γ-γ data from the spontaneous fission of Cf252 using Gammasphere. The excited states in Pm157 and those above the isomers in even-A Pm isotopes Pm152,154,156,158 have been identified for the first time. The spectroscopic information on the rotational band structures in odd-A Pm isotopes has been extended considerably to higher spins and the possibility of the presence of reflection asymmetric shapes is explored. The configuration assignments are based on the results of cranked relativistic Hartree-Bogoliubov calculations. From the systematics of bands in odd-A Pm isotopes and weak population of opposite parity bands, octupole deformed shapes in neutron-rich Pm isotopes beyond N=90 seem unlikely to be present.

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Dates et versions

hal-01902875 , version 1 (23-10-2018)

Identifiants

Citer

S. Bhattacharyya, E.H. Wang, A. Navin, M. Rejmund, J.H. Hamilton, et al.. Deformed band structures in neutron-rich $^{152-158}$Pm isotopes. Physical Review C, 2018, 98 (4), pp.044316. ⟨10.1103/PhysRevC.98.044316⟩. ⟨hal-01902875⟩
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