Influence of Shell on Pre-scission Particle Emission of a Doubly Magic Nucleus 208Pb

Using Smoluchowskiequation, we study the shell effects on the emission of lightparticles in the fission process of a doubly magic nucleus²⁰⁸Pb. Calculated results show that shell has a considerableeffect on the neutron emission and that shell effect graduallybecomes weak with increasing excitation energy. In addition, adependence of shell effects in the neutron emission on the angularmomentum has been found.