Exploratory study of fission product yields of neutron-induced fission of U235, U238, and Pu239 at 8.9 MeV

C. Bhatia, B. F. Fallin, M. E. Gooden, C. R. Howell, J. H. Kelley, W. Tornow, C. W. Arnold, E. Bond, T. A. Bredeweg, M. M. Fowler, W. Moody, R. S. Rundberg, G. Y. Rusev, D. J. Vieira, J. B. Wilhelmy, J. A. Becker, R. Macri, C. Ryan, S. A. Sheets, M. A. Stoyer, and A. P. Tonchev
Phys. Rev. C 91, 064604 – Published 5 June 2015

Abstract

Using dual-fission chambers each loaded with a thick (200400mg/cm2) actinide target of 235,238U or Pu239 and two thin (10100μg/cm2) reference foils of the same actinide, the cumulative yields of fission products ranging from Sr92 to Nd147 have been measured at En=8.9MeV. The H2(d,n)He3 reaction provided the quasimonoenergetic neutron beam. The experimental setup and methods used to determine the fission product yield (FPY) are described, and results for typically eight high-yield fission products are presented. Our FPYs for U235(n,f), U238(n,f), and Pu239(n,f) at 8.9 MeV are compared with the existing data below 8 MeV from Glendenin et al. [Phys. Rev. C 24, 2600 (1981)], Nagy et al. [Phys. Rev. C 17, 163 (1978)], Gindler et al. [Phys. Rev. C 27, 2058 (1983)], and those of Mac Innes et al. [Nucl. Data Sheets 112, 3135 (2011)] and Laurec et al. [Nucl. Data Sheets 111, 2965 (2010)] at 14.5 and 14.7 MeV, respectively. This comparison indicates a negative slope for the energy dependence of most fission product yields obtained from U235 and Pu239, whereas for U238 the slope issue remains unsettled.

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  • Received 5 March 2015
  • Revised 18 April 2015

DOI:https://doi.org/10.1103/PhysRevC.91.064604

©2015 American Physical Society

Authors & Affiliations

C. Bhatia1,2,*, B. F. Fallin1,2, M. E. Gooden2,3,4,†, C. R. Howell1,2, J. H. Kelley2,3, W. Tornow1,2, C. W. Arnold4, E. Bond4, T. A. Bredeweg4, M. M. Fowler4, W. Moody4, R. S. Rundberg4, G. Y. Rusev4, D. J. Vieira4, J. B. Wilhelmy4, J. A. Becker5, R. Macri5, C. Ryan5, S. A. Sheets5, M. A. Stoyer5, and A. P. Tonchev5

  • 1Department of Physics, Duke University, Durham, North Carolina 27708, USA
  • 2Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
  • 3Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
  • 4Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 5Lawrence Livermore National Laboratory, Livermore, California 94550, USA

  • *Present address: McMaster University, Hamilton L8S2N9, Canada; bhatiac@mcmaster.ca
  • Present address: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

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Vol. 91, Iss. 6 — June 2015

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