E3 and M2 transition strengths in Bi83209

O. J. Roberts et al.
Phys. Rev. C 93, 014309 – Published 14 January 2016

Abstract

The 1i1321h92(M2) and 3s122f72(E3) reduced proton transition probabilities in Bi83209 have been determined from the direct half-life measurements of the 1321+ and 121+ states using the Romanian array for γ-ray SPectroscopy in HEavy ion REactions (RoSPHERE). The 1321+ and 121+ states were found to have T12=0.120(15) ns and T12=9.02(24) ns respectively. Angular distribution measurements were used to determine an E3/M2 mixing ratio of δ=0.184(13) for the 1609 keV γ-ray transition deexciting the 1321+ state. This value for δ was combined with the measured half-life to give reduced transition probabilities of B(E3,1321+921)=12(2)×103e2fm6 and B(M2,1321+921)=38(5)μN2fm2. These values are in good agreement with calculations within the finite Fermi system. The extracted value of B(E3,121+721)=6.3(2)×103e2fm6 can be explained by a small (6%) admixture in the wave function of the 121+ state.

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  • Received 15 June 2015
  • Revised 16 November 2015

DOI:https://doi.org/10.1103/PhysRevC.93.014309

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

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Vol. 93, Iss. 1 — January 2016

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