Regular Article – Experimental Physics
Total kinetic energy and mass yields from the fast neutron-induced fission of
Department of Chemistry, Oregon State University, Corvallis, OR, USA
2 P-27, Physics Division, Los Alamos National Lab, Los Alamos, NM, USA
Accepted: 18 October 2020
Published online: 26 November 2020
The total kinetic energy (TKE) release in fission is an important observable, constituting over 80% of the energy released in fission (). While the TKE release in the (n,f) reaction was previously measured up to 50 MeV incident neutron energy (), there were features in TKE release at the highest values of that were puzzling. There was a marked flattening of TKE release from to 50 MeV, in disagreement with the clearly decreasing TKE observed from to 30 MeV. To verify and clarify this trend, TKE measurements at higher values of were made. We present absolute measurements of TKE release in (n,f) from to 100 MeV. We used silicon PIN detectors to measure the fragment energies and deduce mass-yield curves using the 2E-method. We also discuss fission asymmetry and the relationships between approximate fission fragment mass and distortion.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2020