Large Collision Residues and Nuclear Fission in the Interaction of 25.2-GeVC12with Uranium

Abstract

Target-residue mass and charge distributions have been measured for 76 products of the interaction of 25.2-GeV ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ with U. The mass yield curve shows two prominent bumps: one for $80<~A<~145$ resulting from the modest excitation-energy (50-100 MeV) fission of a species with $A\sim 225$, and the second for $160<~A<~190$ apparently due to the survivors of a more central collision between projectile and target.