Effects of Isospin on Pre-scission Particle Multiplicity of Heavy Systems and ItsExcitation Energy Dependence

作     者：YEWei CHENNa 

作者机构：DepartmentofPhysicsSoutheastUniversityNanjing210096China DepartmentofAppliedMathematicsNanjingUniversityofFinance＆EconomicsNanjing210003China 

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

年 卷 期：2004年第41卷第5期

页      面：751-756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] 

基　　金：the Teaching & Researching Foundation for Outstanding Teachers of Southeast University 

主　　题：isospin effect pre-scission particle multiplicity excitation energy fission diffusion model 

摘      要：Isospin effects on particle emission of fissioning isobaric sources and isotopic sources , and its dependence on the excitation energy are studied via Smoluchowski equations. It is shown that with increasing the isospin of fissioning systems, charged-particle emission is not sensitive to the strength of nuclear dissipation. In addition, we have found that increasing the excitation energy not only increases the influence of nuclear dissipation on particle emission but also greatly enhances the sensitivity of the emission of pre-scission neutrons or charged particles to the isospin of the system. Therefore, in order to extract dissipation strength more accurately by taking light particle multiplicities it is important to choose both a highly excited compound nucleus and a proper kind of particles for systems with different isospins.