A simple description of the temperature dependence of the width of the fission-fragment mass yield in ^(197)Au and ^(209)Bi at intermediate energies  

作　　者：V.Yu.Denisov O.A.Belyanovska V.P.Khomenkov I.Yu.Sedykh K.M.Sukhyy 

机构地区：[1]Institute for Nuclear Research [2]Ukrainian State University of Chemical Technology [3]Faculty of Physics, Taras Shevchenko National University of Kiev [4]National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" [5]Financial University

出　　处：《Chinese Physics C》2019年第1期91-95,共5页中国物理C（英文版）

摘　　要：A simple approach is proposed to describe the experimental data for the widths of the fission-fragment mass yields in^(197)Au and^(209)Bi at low and intermediate energies.The approach is based on the expressions for the temperature dependence of the width of the fission-fragment mass yield and the mass of the most probable fragment.The expression for the width of the fission-fragment mass yield depends on the mass of the most probable fragment,the surface terms of the energy level density parameter,the temperature and the stiffness parameter of the potential related to mass-asymmetric degree of freedom.It is shown that the contribution of the surface term of the energy level density parameter is important for describing the experimental data in a wide range of energies.A simple approach is proposed to describe the experimental data for the widths of the fission-fragment mass yields in^(197)Au and^(209)Bi at low and intermediate energies.The approach is based on the expressions for the temperature dependence of the width of the fission-fragment mass yield and the mass of the most probable fragment.The expression for the width of the fission-fragment mass yield depends on the mass of the most probable fragment,the surface terms of the energy level density parameter,the temperature and the stiffness parameter of the potential related to mass-asymmetric degree of freedom.It is shown that the contribution of the surface term of the energy level density parameter is important for describing the experimental data in a wide range of energies.

关 键 词：fission-fragment MASS YIELD WIDTH of fission-fragment MASS YIELD temperature DEPENDENCE FISSION 

分 类 号：O4[理学—物理]