New excitations in Ba142 and Ce144 : Evolution of γ bands in the  | Zendy

H. Naïdja | Zendy; F. Nowacki | Zendy; B. Bounthong | Zendy; M. Czerwiński | Zendy; T. Rząca-Urban | Zendy; T. Rogiński | Zendy; W. Urban | Zendy; Jarosław A. Wiśniewski | Zendy; K. Sieja | Zendy; A. G. Smith | Zendy; J. F. Smith | Zendy; G. S. Simpson | Zendy; I. Ahmad | Zendy; J. P. Greene | Zendy

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New excitations in Ba142 and Ce144 : Evolution of γ bands in the

Author(s) -

H. Naïdja,

F. Nowacki,

B. Bounthong,

M. Czerwiński,

T. Rząca-Urban,

T. Rogiński,

W. Urban,

Jarosław A. Wiśniewski,

K. Sieja,

A. G. Smith,

J. F. Smith,

G. S. Simpson,

I. Ahmad,

J. P. Greene

Publication year - 2017

Publication title -

physical review. c

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.679

H-Index - 235

eISSN - 2469-9993

pISSN - 2469-9985

DOI - 10.1103/physrevc.95.064303

Subject(s) - excited state , physics , spins , atomic physics , spontaneous fission , nuclear physics , fission , neutron , condensed matter physics

International audienceNew excited states in $^{142}$Ba and $^{144}$Ce are investigated by means of prompt $\gamma$-ray spectroscopy of the radiation following spontaneous fission of $^{252}$Cf. Measurements of angular correlations and the observed branchings allowed the assignment of spins and parities with confidence. The new measurements are reinforced by shell-model calculations where energy levels, electric transitions, and magnetic moments are consistent with experimental data. The presence of collectivity in the N=86 isotones is confirmed by clear signatures of soft triaxial γ bands in both nuclei

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