Abstract
From co~nc~dence measurements between projecttle fragments or heavy residues and thetr assoc~ated Y-rays, we ave der' ed the angular momentum transfer In the incomplete fusion reactions of 310 MeV ''0 wtth 'Sm as a functton of !,near momentum transfer. The results have been compared with recent model predictions. Correlated measurements of linear momentum and angular momentum transfer in heavy ion collisions offer the possibility of delineating the part~al wave dependence of domlnant reaction mechantsms such as complete and incomplete fusion. Th~s allows one to test various theorettcal models which treat incomplete fusion such as the sum-rule model of Wilczynski(ll. the geometric overlap model of Harvey (2,3) and the more mtcroscoplc models, based on nucleon-nucleon ~nteractlons, proposed by Harvey (4) and by Cole (51. EXPERIMENTS: We have deduced the correlation bet een linear momentu transfer and angular momentum transfer in the reactions of 310 MeV '0 projectiles with m4Sm from two separate experiments performed at Texas AM (2) Measurements of the average y-ray multiplicity (using an 8-element Nal multiplicity filter) in coincidence with a microchannel plate - silicon detector time-of-flight system to measure the velocity of recoiling heavy residues. Linear momentum transfer was derived in the first experiment from the energies of the projectile-like fragments with corrections for missing momentum carried away by unobserved particles and in the second experiment from the residue velocities. Angular momentum transfer was derived from total gamma energy or gamma multiplicity, respectively. These two measurements taken together yield data that span the full range of fractional momentum transfer from 0 to 1. Details of the experiments will be given in a full article to be published elsewhere.
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