Shell effects on pre-scission particle emission

摘要

The shell effects on the emission of light particles in fission processes are explored in the framework of the Smoluchowski equation. Two doubly magic nuclei, Sn-132 and Pb-208, are chosen as representatives to demonstrate the shell effects. Calculations show that the shell has a significant effect on the neutron emission for the two nuclei and that this shell effect on prescission neutron multiplicity gradually fades out with increasing excitation energy. In addition, a dependence of shell effects in neutron emission on angular momentum has been found. [References: 17]