Energetics and Mass Distribution of Fission Fragments in Triton- and Proton-Accompanied Fission ofCf252

The kinetic energies of the fission fragments and of the light particle emitted in triton- and proton-accompanied fission of ${\mathrm{Cf}}^{252}$ were measured in a four-parameter correlation experiment. Assuming that the average total kinetic energy of the fragments in long-range alpha fission (LRA fission) is 172.9 MeV, this value in triton-accompanied fission was found to be 173.5±0.3, while in proton-accompanied fission the value of 173.6±0.5 was obtained. The mass distribution in triton-accompanied fission was found to be very similar to that in LRA fission, while this distribution for proton-accompanied fission is somewhat different from that in both binary and LRA fission. In addition, the degree of correlation between the average total fission-fragment energy and the particle energy was measured.