Spontaneous Fission Kinetics ofCf252

Abstract

A double ionization chamber is used to determine the spontaneous fission modes of ${\mathrm{Cf}}^{252}$ [${\tau }_{\frac{1}{2}}\left(\mathrm{fission}\right)=66\mathrm{}$ years]. The most probable energies of the light and heavy fragments are measured to be 107 and 79 Mev, respectively. The asymmetry of the process is found to agree with chemical mass-yield determinations. The results of the experiment are compared with the kinetics of other fission processes.