COMPETITION BETWEEN DYNAMICAL AND SEQUENTIAL REACTION CHANNELS IN 197Au+197Au COLLISIONS AT A BOMBARDING ENERGY OF 23A MeV

Competition between the two reaction channels: sequential breakup and neck fragmentation has been studied in peripheral and semi-peripheral collisions of the Au-197+Au-197 system at bombarding energy of 23A MeV. It was found that the emission of heavy (A < 50) neck-originating fragments occurs in about 22% of ternary breakup events, making this reaction channel highly competitive with the sequential breakup of the projectile- or target-like fragment (78% of events).