1. Production and decay of K-shell hollow krypton in collisions with 52 - 197 MeV/u bare xenon ions
- Author
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Yuezhao Zhang, Yehong Wu, Caojie Shao, Deyang Yu, Xiaohong Cai, Ximeng Chen, Bian Yang, Chenzhong Dong, Xi Chen, Y. S. Kozhedub, Yingli Xue, Wei Wang, Jarah Evslin, Yipan Guo, Mingwu Zhang, Fangfang Ruan, Zhihu Yang, Kun Ma, Jianming Zhang, Junliang Liu, Rongchun Lu, and Zhangyong Song
- Subjects
Physics ,Atomic Physics (physics.atom-ph) ,Krypton ,Electron shell ,chemistry.chemical_element ,FOS: Physical sciences ,01 natural sciences ,Spectral line ,Charged particle ,010305 fluids & plasmas ,Ion ,Physics - Atomic Physics ,Xenon ,chemistry ,Ionization ,0103 physical sciences ,Physics::Atomic and Molecular Clusters ,Atomic physics ,010306 general physics ,Nuclear Experiment ,Storage ring - Abstract
X-ray spectra of K-shell hollow krypton atoms produced in single collisions with 52 - 197 MeV/u Xe54+ ions are measured in a heavy-ion storage ring equipped with an internal gas-jet target. Energy shifts of the K{\alpha}_1,2^s, K{\alpha}_1,2^(h,s), and K\b{eta}_1,3^s transitions are obtained. Thus, the average number of the spectator L-vacancies presented during the x-ray emission is deduced. From the relative intensities of the K{\alpha}_1,2^s and K{\alpha}_1,2^(h,s) transitions, the ratio of K-shell hollow krypton to singly K-shell ionized atoms is determined to be 14 - 24%. In the considered collisions, the K-vacancies are mainly created by the direct ionization which cannot be calculated within the perturbation descriptions. The experimental results are compared with a relativistic coupled channel calculation performed within the independent particle approximation., Comment: 5 figures, 9 pages. Accepted by Physical Review A
- Published
- 2017
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