Orateur
Description
A.P. Tonchev1,4, A.P.D. Ramirez1, R.C. Malone1, J.A. Silano1, R. Henderson1, M.A. Stoyer1, N. Schunck1, M.E. Gooden2, J. Wilhelmy2, W.
Tornow3,4, C.R. Howell3,4, S. Finch3,4 1Lawrence Livermore National
Laboratory, Livermore, California 94550, USA 2Los Alamos National
Laboratory, P.O. Box 1663, Los Alamos, NM 87545, USA 3Triangle
Universities Nuclear Laboratory, Durham, North Carolina, 27708, USA
4Department of Physics, Duke University, Durham North Carolina, 27708,
USA
Observables from fission are essential ingredients for addressing both fundamental and applied physics problems. Despite the fact that new applications require accurate energy dependent fission product yield (FPY) data over a wide range of incident neutron energies, FPY data files evaluated to date contain only three energy points: thermal, fast, and 14 MeV incident energies. The purpose of this presentation is to give an overview of an energy-dependent FPY measurements of 235U(n,f), 238U(n,f), and 239Pu(n,f) using monoenergetic neutron beams over a wide range of incident energies [1]. The FPY results will be discussed in terms of (i) contributions from different fission modes, (ii) fission fragment isomeric ratios, (iii) comparison with inverse-kinematic fission-fragment yields, and (iv) fission yield databases [2-4].
[1] A. Tonchev et al., Nucl. Data Sheets 202, 12 (2025).
[2] M. Gooden et al., Phys. Rev. C 109, 044604 (2024).
[3] N. Schunck et al., Phys. Rev. C 107, 044312 (2023).
[4] A.P.D. Ramirez et al., Phys. Rev. C 107, 054608 (2023).
