Symmetric Fission Observed in Thermal-Neutron-Induced and Spontaneous Fission of Fm257

W. John, E. K. Hulet, R. W. Lougheed, and J. J. Wesolowski
Phys. Rev. Lett. 27, 45 – Published 5 July 1971
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Abstract

The observed mass distribution for thermal-neutron-induced fission of Fm257 is strongly symmetric, whereas that for spontaneous fission of Fm257 is found to be predominantly asymmetric with, however, some symmetric fission present. The mass distributions were derived from energy measurements on coincident fission fragments. The onset of symmetric fission at Fm257 supports theories relating asymmetric fission to the second hump of the fission barrier.

  • Received 14 May 1971

DOI:https://doi.org/10.1103/PhysRevLett.27.45

©1971 American Physical Society

Authors & Affiliations

W. John, E. K. Hulet, R. W. Lougheed, and J. J. Wesolowski

  • Lawrence Radiation Laboratory, University of California, Livermore, California 94550

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Issue

Vol. 27, Iss. 1 — 5 July 1971

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