New short-lived isomers in Y84

M. Ionescu-Bujor, A. Iordachescu, D. Bucurescu, and N. Marginean
Phys. Rev. C 72, 044313 – Published 27 October 2005

Abstract

Low-lying short-lived isomeric states have been investigated in Y84 by the Sr84(p,n) reaction at Ep=13.5 MeV. The g factors were measured by applying the time-differential perturbed angular distribution method in an external magnetic field. The properties determined for the new isomers are Ex=112.4 keV, Iπ=(4+),T1/2=79(2) ns, g=+0.578(7);Ex=210.4 keV, Iπ=(4),T1/2=292(10) ns, g=+0.234(6). On the basis of the measured g factor, the π1g9/2ν1g9/2 configuration has been assigned to the 4+ isomeric state. The low-lying states in Y84 were discussed within the two-quasiparticles plus rotor model. The 4 isomeric state has been interpreted by the pure π[301]3/2ν[422]5/2 configuration, which reproduces the experimental g factor at a prolate quadrupole deformation of ɛ20.16.

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  • Received 26 July 2005

DOI:https://doi.org/10.1103/PhysRevC.72.044313

©2005 American Physical Society

Authors & Affiliations

M. Ionescu-Bujor, A. Iordachescu, D. Bucurescu, and N. Marginean*

  • National Institute for Physics and Nuclear Engineering, Bucharest, Romania

  • *Present address: INFN, Laboratori Nazionali di Legnaro, Legnaro, Italy.

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Vol. 72, Iss. 4 — October 2005

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