PKA原子和SKA原子对同位素(溅射)富集度的贡献分析  

Analysis of the contributions of PKA and SKA to the isotope enrichment

作　　者：郑里平[1] 张虎勇[1] 王庭太[1] 马余刚[1] 

机构地区：[1]中国科学院上海应用物理研究所

出　　处：《物理学报》2004年第5期1577-1582,共6页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号:19675 0 61;19875 0 74)资助的课题~~

摘　　要：用MonteCarlo模拟方法 ,分析了PKA原子和SKA原子对同位素 (溅射 )富集度的贡献。对于低能零剂量6 3Cu0 56 5Cu0 5溅射 ,同位素富集度是SKA原子的动量不对称性贡献 .对于低能零剂量92 Mo0 51 0 0 Mo0 5溅射 ,是PKA原子的动量不对称性贡献 .The contribution of primary knock-on atoms(PKA) or that of secondary knock-on atoms(SKA) to the zero-fluence isotope enrichment, has been analyzed with the help of Monte Carlo (MC) simulations. For low-energy and zero-fluence 63Cu 0.5 65Cu 0.5 sputtering, the present simulations show the isotope enrichment to be the contribution of the momentum asymmetry of SKA. For low-energy and zero-fluence 92Mo 0.5 100Mo 0.5 sputtering, the MC simulations of Ref.[24] showed the isotope enrichment to be the contribution of PKA. However, for this sputtering, the present simulations show that the isotope enrichment is the contribution of the momentum asymmetry of PKA rather than the contribution of PKA.

关 键 词：动量不对称性 同位素富集度 溅射 蒙特卡罗模拟 PKA原子 SKA原子 

分 类 号：O562[理学—原子与分子物理]