Excitation energy deposition and the fission process in the reactions copper-63 + molybdenium-92,100 at 10, 17, 25 and 35 AMeV and neon-20 + samarium-144,148,154 at 20 AMeV.

摘要

Excitation energy deposition and light particle emission for fissioning nuclei with excitation energies from 2 to 6 MeV/nucleon are studied for the reaction of 20 AMeV ;With increasing beam energy, an increasing discrepancy between the excitation energy derived from the LMT measurements and the reconstructed one is observed attributed to intermediate mass fragment (IMF) emission. The measured neutron multiplicities show a strong increase with increasing neutron to proton ratio of composite system, as well as increasing beam energy. The experimental data for particle multiplicities are compared with calculations using the statistical model GEMINI. The effect of the dynamic fission delay on the light particle multiplicities is explored. The neutron multiplicities are relatively insensitive to the dynamic fission delay. The calculated charged particle multiplicities are more sensitive, but the comparisons between the calculation and experiment indicate that the light charged particle multiplicity data are not a good measure of dynamic fission delay.