Evidence for a Limitation of the Linear Momentum Transfer inC12-Induced Reactions between 30 and 84 MeV/u

Linear momentum transfers have been determined for ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$-induced reactions at energies from 30 to 84 MeV/u on U, Au, and Ni. The folding-angle distribution of the fission fragments for the first two targets, and the angular distribution of low-energy protons emitted by the nickel-like nucleus, provide evidence for a limitation of the transferred momentum at 2 GeV/c. This limitation effect is reached above a bombarding energy around 15 MeV/u.