Charge-state dependence of inner-shell processes in collisions between highly charged Xe ions and solids at intermediate energies
Charge-state dependence of inner-shell processes in collisions between highly charged Xe ions and solids at intermediate energies
复制标题
高电荷 Xe 离子与固体在中等能量碰撞中内壳过程的电荷态依赖性
DOI：
10.1103/physreva.92.062710
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发表时间：
2015-12-11
影响因子：
2.9
通讯作者：
Xiao, Guoqing
中科院分区：
文献类型：
--
作者：
Ren, Jieru;Zhao, Yongtao;Xiao, Guoqing
测量了2-6 MeV的Xeq ~+（q = 20，22，2 - 6，30）离子穿透铁和镍厚靶时的X射线辐射。一个明显的电荷状态和入射能量的目标，弹丸的空位产生截面比的依赖性被发现的铁靶，但不为镍靶。结果得到了空位共享模型和直接电离理论的支持，并暗示了能级匹配对于内壳层过程的重要性。从测得的X射线产率导出固体铁中Xe 30+的电荷平衡时间约为9 fs。
The x-ray emission during the penetration of 2-6 MeV Xeq+ (q = 20,22,26,30) ions into thick solid targets of iron and nickel has been measured. An obvious charge-state and incident-energy dependence of the target-to-projectile vacancy-production cross-section ratios was found for the iron target but not for the nickel target. The results are supported by the vacancy-sharing model and direct ionization theory and imply the great importance of level matching for the inner-shell process. The charge equilibration time of Xe30+ in solid iron was derived to be around 9 fs from the measured x-ray yields.