Comparison of fragment kinetic energies from twoPu237fission isomers

Abstract

Fission fragment kinetic energy distributions have been measured separately for two spontaneously fissioning isomers of $^{237}\mathrm{Pu}$ produced by the $^{237}\mathrm{Np}(d,2n)^{237}\mathrm{Pu}^{m}$ reaction at 13 MeV. Single fragment peak to valley ratios and heavy and light fragment peak positions were measured for each of the two isomers. Average fragment kinetic energies for each isomer were calculated and compared. Values of isomeric fission half-life are reported with increased accuracy.NUCLEAR REACTIONS, FISSION $^{237}\mathrm{Np}(d,2n)^{237}\mathrm{Pu}^{m}$, $E=13$ MeV. Spontaneously fissioning isomers. For each isomer: fragment $E$, ${T}_{\frac{1}{2}}$.