New Yttrium Isomers of Masses 86 and 90

Larry Haskin and Robert Vandenbosch
Phys. Rev. 123, 184 – Published 1 July 1961
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Abstract

Cyclotron bombardment of Rb with alpha particles and Sr with deuterons have yielded two new yttrium activities. Y86m decays with a half-life of 49.0±1.5 min. The isomer is supported by a highly converted 7.2-kev isomeric transition followed by a 210-kev gamma ray having a conversion coefficient eγ=0.06±0.01. Y90m has a half-life of 3.19±0.06 hr, decaying to the Y90 ground state with emission of two gamma rays: 476 kev, eγ=0.10±0.02, and 203 kev, eγ=0.036±0.007. Spin and parity assignments are made for the Y90 levels.

  • Received 16 February 1961

DOI:https://doi.org/10.1103/PhysRev.123.184

©1961 American Physical Society

Authors & Affiliations

Larry Haskin

  • Department of Chemistry, University of Wisconsin, Madison, Wisconsin, and Argonne National Laboratory, Argonne, Illinois

Robert Vandenbosch

  • Argonne National Laboratory, Argonne, Illinois

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Vol. 123, Iss. 1 — July 1961

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