Fission events in the 120 MeV¹²C+²³⁸U system

Abstract

Three recoil studies of the system 120 MeV 12C+238U have been performed, one measuring the cross section of 49 fission products, the second, the angular distribution of 33 of them, and the third, the differential range distribution of the same 33. Using the recoil velocity of the intermediate nucleus as a signature of the projectile-target interaction, the cross section, angular anisotropy, and kinetic energy measurements have been divided into complete and incomplete fusion contributions. About 30% of the cross section may be accounted for by incomplete fusion, most probably of an alpha -particle. Angular anisotropies are calculated for both complete and incomplete fusion components for each of the individual products. A method is introduced for the reconstruction of fission events based on the measured energies of individual products and is used to determine kinetic energy distributions in the two types of processes.