Neutron and gamma emission from highly excited states and states with high spin. Annual progress report

Abstract

During the last year attention was focused on the theoretical study of heavy ion induced reactions at low and intermediate energy with particular attention on very heavy projectiles. Most of the studies described have been finished, others are under current investigation. In most of the calculations, a classical dynamical approach was adopted, others concern themselves with assessing the validity of this classical approximation. In all calculations, one addressed oneself to the evaluation of quantities which are measured experimentally. Examples of such quantities are the critical angular momentum for complete fusion, the angular distribution for deep inelastic processes, and mass and energy transfer. The following topics have been investigated during the recent phase of this program: (1) The development of a classical dynamical model for the study of heavy ion reactions. (2) The calculation of the critical angular momentum using the proximity potential. (3) The role of potential and friction in heavy ion reactions. (4) Angular distribution for Kr induced reactions. (5) The validity of the sharp cut-off approximation. (6) The difference between Argon and Krypton induced reactions leading to the same compound nucleus. (7) Statistical studies of mass transfer. (8) The inclusion of the necking degree of freedom. (9) Semiclassical calculation. The results of the studies of the first seven topics are already available in the open literature. The last two topics are under current investigation. (auth)