An Incremental Model for Defect Production upon Cascade Overlapping  

作　　者：Yi Wang Wensheng Lai Jiahao Li 王忆;赖文生;李家好(The Key Laboratory of Advanced Materials(MOE),School of Materials Science and Engineering,Tsinghua University,Beijing 100084)

机构地区：[1]The Key Laboratory of Advanced Materials(MOE),School of Materials Science and Engineering,Tsinghua University,Beijing 100084

出　　处：《Chinese Physics Letters》2020年第1期43-47,共5页中国物理快报（英文版）

基　　金：the National Key Research and Development Program of China(No.2017YFB0702201);the National Natural Science Foundation of China(No.51571129).

摘　　要：An analytic incremental model is proposed to predict the defect production upon cascade overlapping.By resolving the coupled annealing events during cascade overlapping,this model handles cascade overlapping with multiple pre-existing defects of different sizes and number densities.The model is first parameterized and then applied to bcc-Fe.The proposed model satisfyingly reproduces the defect production obtained by molecular dynamics simulations with various radiation damage levels and defect cluster size distributions.The present model provides an essential description of the primary source of radiation damage,especially for high dose irradiation,and could be used in conjunction with reactive diffusion models for better understanding of radiation damage.

关 键 词：DAMAGE HANDLE SIZES 

分 类 号：TG14[一般工业技术—材料科学与工程]