单、双洞态镁离子的退激发及末电离态离子分布的研究  

Cascade decays and final charge-state distribution of single K-vacancy and double K-vacancy magnesium ions

作　　者：胡宏伟[1] 董晨钟[1] 师应龙[1] 

机构地区：[1]西北师范大学物理与电子工程学院,兰州730070

出　　处：《物理学报》2007年第7期3887-3892,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10376026;10434100);兰州重离子加速器国家实验室原子核理论中心基金;科技部国际合作项目(批准号:CI-2004-07)资助的课题.~~

摘　　要：在分析双洞相关退激发对双洞态退激发的贡献较小的基础上,依据辐射-俄歇-双俄歇级联退激发模型(RACDA)研究了Mg1+(1s-1)(K壳层单洞态镁离子)和Mg2+(1s-2)(K壳层双洞态镁离子)的退激发过程,计算了它们的末电离态离子的分布,并与辐射-俄歇级联退激发模型的结果进行了比较.RACDA模型计算的Mg1+(1s-1)的4价末电离态离子的相对丰度较大,而辐射-俄歇级联退激发模型(RAC)的结果中就没有出现4价离子;两种模型计算Mg2+(1s-2)的6价末电离态离子的丰度非常大,而RAC模型下的Mg2+(1s-2)退激发后不产生6价离子.Based on the conclusion that the contribution of correlated decay of two vacancies in atoms is small, the de-excitation process of Mg^1＋ （ls^-1） hollow magnesium ions with single K-vacancy and Mg^2＋ （ls^-2） double K-vacancy were treated by applying the radiative-single Auger - double Auger cascade model（RACDA）. The final-charge-state distribution（FCSD） of these hollow ions were calculated, and compared with that obtained with the radiative-single Auger cascade model（RAC）. The probability of tetravalent ion production via the de-excitation of Mg^1＋ （1 s^-1 ） obtained by RACDA model is considerable, but tetravalent ion is not produced in the by RAC model. The probability of hexavalent ion production via the de-excitation of Mg^2＋ （ 1 s^- 2 ） obtained by RACDA model is very large, but hexavalent ion is not produced in the RAC model.

关 键 词：双洞态退激发 RACDA退激发模型 末电离态离子分布 

分 类 号：O562.1[理学—原子与分子物理]