Low-energy atomic displacement model of SRIM simulations  

作　　者：Sheng-Li Chen 

机构地区：[1]Sino-French Institute of Nuclear Engineering and Technology,Sun Yat-Sen University,Zhuhai 519082,China

出　　处：《Nuclear Science and Techniques》2021年第11期15-24,共10页核技术（英文）

基　　金：supported by the Fundamental Research Funds for the Central Universities,Sun Yat-sen University (No. 2021qntd12)。

摘　　要：Radiation-induced atomic displacement damage is a pressing issue for materials.The present work investigates the number of atomic displacements using the Primary Knock-on Atom (PKA) energy E_(PKA)and threshold displacement energy E_(d)as two major parameters via lowenergy SRIM Binary Collision Approximation (BCA) full cascade simulations.It is found that the number of atomic displacements cannot be uniquely determined by E_(PKA)/E_(d )or E_(D) /E_(d)(E_(D) refers to the damage energy) when the energy is comparable with E_(d).The effective energy E_(D,eff)proposed in the present work allows to describing the number of atomic displacements for most presently studied monatomic materials by the unique variable E_(D,eff)/E_(d).Nevertheless,it is noteworthy that the BCA simulation damage energy depends on E_(d),whereas the currently used analytical method is independent of E_(d).A more accurate analytical damage energy function should be determined by including the dependence on E_(d).

关 键 词：Atomic displacement Damage energy Effective energy SRIM neutron cascade simulations 

分 类 号：TB30[一般工业技术—材料科学与工程]