Identification of Pt185 α activity and study of Au185 α decay

C. R. Bingham, M. B. Kassim, M. Zhang, Y. A. Akovali, K. S. Toth, W. D. Hamilton, H. K. Carter, J. Kormicki, J. von Schwarzenberg, and M. M. Jarrio
Phys. Rev. C 44, 1208 – Published 1 September 1991
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Abstract

The α decay of Pt185 has been observed for the first time and α-decay branching ratios have been determined for Au185 and Pt185 by use of an on-line isotope separator. A single α-decay line at 4444±10 keV has been shown to result from the decay of Pt185. The current data are insufficient to determine which of the long-lived states of Pt185 decays via α emission. The α branching deduced from the α, γ, and x-ray data taken simultaneously is [(1.0±0.4)×103]% if the α comes from the 33.0-min isomer, or [(5.0±2.0)×103]% if the α comes from the 70.9-min ground state of Pt185. In either case the transition is an unhindered one. Two lines at 5069±10 and 4826±10 keV, with relative intensities of 100 and 0.16, are attributed to the α decay of Au185 and the deduced α branching is (0.7±0.1)%. The hindrance factors are 0.4 for the 5069-keV, and 8.8 for the 4826-keV transitions.

  • Received 8 April 1991

DOI:https://doi.org/10.1103/PhysRevC.44.1208

©1991 American Physical Society

Authors & Affiliations

C. R. Bingham

  • The University of Tennessee, Knoxville, Tennessee 37996
  • Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831

M. B. Kassim and M. Zhang

  • The University of Tennessee, Knoxville, Tennessee 37996

Y. A. Akovali and K. S. Toth

  • Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831

W. D. Hamilton

  • Joint Institute of Heavy Ion Research, Oak Ridge, Tennessee 37831

H. K. Carter

  • University Isotope Separator at Oak Ridge, Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831

J. Kormicki

  • Vanderbilt University, Nashville, Tennessee 37325

J. von Schwarzenberg and M. M. Jarrio

  • Georgia Institute of Technology, Atlanta, Georgia 30332

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Vol. 44, Iss. 3 — September 1991

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