Study of the Pt189Ir189Os189 Decay Chain

H. R. Lewis, Jr., R. A. Naumann, J. M. Prospero, and D. Thomas
Phys. Rev. 134, B322 – Published 27 April 1964
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Abstract

Permanent magnet electron spectrographs, a double-focusing electron spectrometer, and gamma-scintillation spectrometers have been used to measure the energies and intensities of radiations which accompany the decay of Pt189. From these data, the conversion coefficients, multipolarities, and mixing ratios of a number of the transitions have been determined. Some new transitions are reported, and a revised level scheme, incorporating all but one of the observed transitions, is proposed for Ir189. A half-life of 10.87±0.12 h has been determined for Pt189. The gamma-scintillation spectrum obtained from a pure source of Ir189 is reported. The half-life of Ir189 which has been measured is 13.3±0.1 days.

  • Received 22 July 1963

DOI:https://doi.org/10.1103/PhysRev.134.B322

©1964 American Physical Society

Authors & Affiliations

H. R. Lewis, Jr.*, R. A. Naumann, J. M. Prospero, and D. Thomas

  • Palmer Physical Laboratory, Princeton University, Princeton, New Jersey

  • *Present address: Los Alamos Scientific Laboratory, P. O. Box 1663, Los Alamos, New Mexico.
  • Present address: Marine Laboratory, Institute of Marine Science, University of Miami, Miami, Florida.
  • Present address: Foreign Office, London, England.

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Issue

Vol. 134, Iss. 2B — April 1964

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