ANGULAR-MOMENTUM IN PERIPHERAL FRAGMENTATION REACTIONS

The angular momentum induced in peripheral fragmentation reactions at relativistic energies is described on the basis of shell-model conside rations. An analytical expression for the spin-cutoff parameter of pre fragments is obtained, and numerical calculations in the framework of the abrasion-ablation model are performed in order to estimate the ang ular-momentum distribution of prefragments and final fragments. Additi onally, an approximative formula is given to calculate the angular-mom entum distribution of final fragments.