单、双洞态镁离子的退激发及末电离态离子分布的研究

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. 关键词： 双洞态退激发 RACDA退激发模型

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

Based on the conclusion that the contribution of correlated decay of two vacancies in atoms is small,the de-excitation process of Mg 1 (1s-1)hollow magnesium ions with single K-vacancy and Mg 2 (1s-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 (1s-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 (1s-2)obtained by RACDA model is very large,but hexavalent ion is not produced in the RAC model.