Abstract

Abstract Inclusive proton spectra from collisions of 32S on 27Al, 46Ti, 60Ni, 120Sn, 124Sn and 197Au at 503.7 and 678.8 MeV have been analyzed. Contributions from central-like collisions have been singled out using a refined multisource analysis and compared with a Boltzmann master-equation calculation. This comparison yields n0, the initial number of degrees of freedom that share the available energy. The dependence of n0 on various physical quantities has been investigated. A smooth dependence of n0−Ap (Ap, the projectile mass number) on the entrance-channel-asymmetry parameter has been observed.

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