Influence of Isotope on Shell Effects of Pre-scission Particle Evaporation

作     者：YE Wei CHEN Na 

作者机构：Department of Physics Southeast University Nanjing 210096 China Department of Applied Mathematics Nanjing University of Finance & Economics Nanjing 210003 China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2005年第44卷第2X期

页      面：343-346页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：国家自然科学基金 Teaching and Researching Foundation for the Excellent Teachers of Southeast University 

主　　题：isotopic effect shell effect pre-scission particle emission Smoluchowski equation 

摘      要：The shell effects on the particle evaporation prior to fission for three Pb isotopes, ^204Pb, ^208Pb, and ^212pb,as well as three Sn isotopes, ^128Sn, ^132Sn, and ^136Sn, are explored by a diffusion model. Calculations show that the magnitude of shell effects in the emission of particles changes with the neutron-to-proton ratio N/Z of these fissioning nuclei, and this change is affected significantly by the spin and excitation energy of the system. It is shown that high angular momentum enhances the dependence of shell effects on the N/Z while high excitation energy weakens such a dependence.