Total kinetic energy release in the fast neutron induced fission of 235U

Yanez, R.; King, J.; Barrett, J. S.; Loveland, W.; Fotiades, Nikolaos; Lee, Hye Young

doi:10.1016/j.nuclphysa.2017.11.007

Title: Total kinetic energy release in the fast neutron induced fission of ²³⁵U

Journal Article · 16 November 2017 · Nuclear Physics. A

DOI: https://doi.org/10.1016/j.nuclphysa.2017.11.007 · OSTI ID:1524372

Yanez, R. ^[1]; King, J. ^[1]; Barrett, J. S. ^[1]; Loveland, W. ^[1];

^[2];

^[2]

Oregon State Univ., Corvallis, OR (United States). Dept. of Chemistry
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The total kinetic energy (TKE) release in the fast neutron induced fission of ²³⁵U was measured for neutron energies E$$_n$$ = 2 - 100 MeV. The TKE distributions are Gaussian in shape. The mean post neutron emission TKE release decreases non-linearly with increasing neutron energy and can be represented as TKE(MeV) = 170.92-3.73774log₁₀E_n-0.65028(log₁₀E_n)². Abrupt changes in the variances of the TKE distributions are observed at the onset of 2nd, 3rd, etc. chance fission. For E_n= 20-100 MeV, the variances are approximately constant. These observations are compared to the predictions of the GEF model for neutron-induced fission. This model describes many of the features of the TKE release adequately.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1524372

Alternate ID(s):: OSTI ID: 1496273

Report Number(s):: LA-UR-17-29240

Journal Information:: Nuclear Physics. A, Vol. 970, Issue C; ISSN 0375-9474

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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