Spontaneous Fission Half-Life of Am242m

Phys. Rev. 155, 1309 – Published 20 March 1967
J. T. Caldwell, S. C. Fultz, C. D. Bowman, and R. W. Hoff

Abstract

The spontaneous-fission half-life for the odd-odd nucleus Am242m has been measured by a prompt-neutron fission-fragment coincidence method to be (9.5±3.5)×1011 years. A correlation of experimental spontaneous-fission half-life data for nuclei of all classes was found to be log10τ-(β-Z2A)δM=-9.268(Z2A)+374.0, where β takes the values 42.22, 40.67, and 40.40 for even-even, odd-A, and odd-odd nuclides, respectively, τ is the spontaneous-fission half-life in years, and δM is the mass difference in milli-mass-units (mmu) between the values obtained from Green's smoothly varying mass formula and the experimentally measured values.

DOI: http://dx.doi.org/10.1103/PhysRev.155.1309

  • Received 19 September 1966
  • Published in the issue dated March 1967

© 1967 The American Physical Society

Authors & Affiliations

J. T. Caldwell, S. C. Fultz, and C. D. Bowman

  • Physics Department, Lawrence Radiation Laboratory, University of California, Livermore, California

R. W. Hoff

  • Chemistry Department, Lawrence Radiation Laboratory, University of California, Livermore, California

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