The Intermediate Velocity Source in the 40Ca + 197Au Reaction at 35 AMeV

The creation of hot Ca-like fragments and the emission of intermediate velocity particles was studied in the 40Ca+197Au reaction at 35 AMeV. For peripheral collisions the primary projectile-like fragment was reconstructed using the AMPHORA 4π detector system. The particle distributions are compared with the predictions of a Monte Carlo code which calculates the nucleon transfer and clustering probabilities according to the system density of states. The velocity distributions of charged particles projected on the beam direction can be explained if emissions from the hot projectile-like fragment and the target-like fragment are supplemented by an emission from an intermediate velocity source located between them. The properties of the intermediate velocity source are properly described, including the 2D/3T/3He effect. (author)