Neutron-induced fission cross sections simulated from (t,pf) results

W. Younes and H. C. Britt
Phys. Rev. C 67, 024610 – Published 28 February 2003
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Abstract

Neutron-induced fission cross sections on 235U and 235Um targets in the incident neutron energy range En=0.12.5MeV have been deduced from surrogate 234U(t,pf) measurements. The surrogate (t,pf) reaction is used to populate the same compound system as the (n,f) reaction before fission, and modeling is used to compensate for the difference in population mechanisms. The calculations presented in this paper improve on previous results by incorporating realistic angular momentum and parity distributions for the (t,p) channel, and by updating transmission-coefficient values used in the neutron-capture and emission contributions that compete with the fission process. The results are generally reliable within the 10% systematic uncertainties of the (t,pf) data.

  • Received 3 October 2002

DOI:https://doi.org/10.1103/PhysRevC.67.024610

©2003 American Physical Society

Authors & Affiliations

W. Younes* and H. C. Britt

  • Lawrence Livermore National Laboratory, Livermore, California 94551

  • *Electronic address: younes@llnl.gov

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Vol. 67, Iss. 2 — February 2003

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