^(129)Xe^(20+)入射Ta靶表面发射的紫外光谱线和X射线谱  

UV Spectral Lines and X-ray Spectra Induced by ^(129)Xe^(20+)Impacting on the Ta Surface

作　　者：王益军 张颖[1] 张小安[1,2] 周贤明 梅策香[1] 梁昌慧[1] 曾利霞[1] 李耀宗[1] 柳钰[1] 向前兰 孟惠[1] 张艳宁 WANG Yijun;ZHANG Ying;ZHANG Xiaoan;ZHOU Xianming;MEI Cexiang;LIANG Changhui;ZENG Lixia;LI Yaozong;LIU Yu;XIANG Qianlan;MENG Hui;ZHANG Yanning(Key Laboratory of Ion Beam and Optical Physical at Xianyang Normal University in Shaanxi Provinc,Xianyang 712000,Shaanxi,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]咸阳师范学院离子束与光物理陕西省高等学校重点实验室,陕西咸阳712000 [2]中国科学院近代物理研究所,兰州730000

出　　处：《原子核物理评论》2023年第4期636-642,共7页Nuclear Physics Review

基　　金：国家自然科学基金项目(12175174,12205247);陕西省自然科学基础研究计划(2020JM-624,2023-JC-YB-032,2023-JC-QN-00080);陕西省数理基础科学研究项目(22JSQ040);陕西省教育厅科研计划项目(22JK0604);咸阳师范学院教改项目(2021Y012,XSYK19028)。

摘　　要：利用动能100~500 keV和1.2~6.0 MeV的^(129)Xe^(20+)离子分别入射Ta靶表面,测量不同速度的入射离子与Ta表面相互作用过程中,激发原子或离子的复杂电子组态间跃迁辐射的光谱线。入射离子动能在100~500 keV范围,测量到Xe原子的多个高里德伯态(其价电子的主量子数分别为n=15,13,11,8)分别向低激发态5p^(5)(2P°_(3/2))6s退激辐射的紫外谱线。分析结果显示,随着入射离子动能的增加,高里德伯态Xe原子谱线的单粒子产额减小。在此碰撞过程中,激发的靶离子光谱线的单粒子产额随入射离子动能的增加而增加。在离子动能增加到1.2~6.0 MeV时,激发的Ta原子M_(α1),M_(α2)特征X射线的单粒子产额随入射离子的动能增加而增加。当入射离子动能为6 MeV时,测量到Xe^(20+)与靶原子Ta碰撞过程中Xe原子的L-X射线谱。Using ^(129)Xe^(20+)ions with kinetic energy of 100~500 keV and 1.2~6.0 MeV respectively incident on the Ta target,the spectral lines of transition radiation are measured between complex electronic configurations of excited atoms or ions during the interaction of incident ions at different velocities with the Ta surface.The ultraviolet spectral lines of the deexcitation radiation from multiple high Rydberg states to low energy state 5p^(5)(2P°_(3/2))6s of Xe atoms are measured as the kinetic energy of Xe^(20+)ranges from 100 to 500 keV,the principal quantum number of valence electrons of Rydberg states is n=15,13,11,and 8,respectively.The results show that as the incident ion velocity increases,the single particle fluorescence yield of the the high Rydberg states spectral line of Xe atoms decreases.During this collision process,the single particle fluorescence yield increases of the spectral lines of the excited target atoms and ions with the increase of the incident ion velocity.When the ion kinetic energy increases to 1.2~6.0 MeV,the single particle yield of the Ta characteristic X-rays(M_(α1),M_(α2))increases with the velocity of the incident ions.When the kinetic energy of the incident ion is 6 MeV,the L X-ray spectra are measured of the Xe atom during the collision between Xe^(20+)and the target atom.

关 键 词：高电荷态离子 空心原子 紫外光谱线 X射线 

分 类 号：O434.11[机械工程—光学工程]