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X-ray spectra induced by slow highly charged Ar q + ions in collision with Nb surface |
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| Authors: | ZhiHu Yang Ying Cui XiMeng Chen ZhangYong Song JianXiong Shao FangFang Ruan HongQiang Zhang Juan Du YuWen Liu ZhiMing Gao XiaoAn Zhang KeXin Zhu DeYang Yu XiaoHong Cai |
| Affiliation: | (1) Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China;(2) Department of Modern Physics, Lanzhou University, Lanzhou, 730000, China;(3) Department of Physics, Xianyang Normal College, Xianyang, 712000, China |
| Abstract: | The X-ray spectra of Nb surface induced by Ar q+ (q = 16,17) ions with the energy range from 10 to 20 keV/q were studied by the optical spectrum technology. The experimental results indicate that the multi-electron excitation occurred as a highly charged Ar16+ ion was neutralized below the metal surface. The K shell electron of Ar16+ was excited and then de-excited cascadly to emit K X-ray. The intensity of the X-ray emitted from K shell of the hollow Ar atom decreased with the increase of projectile kinetic energy. The intensity of the X-ray emitted from L shell of the target atom Nb increased with the increase of projectile kinetic energy. The X-ray yield of Ar17+ is three magnitude orders larger than that of Ar16+. Supported by the National Natural Science Foundation of China (Grant Nos.10774149 and 10405025) |
| Keywords: | highly charged ion hollow atom multi-electron X-ray |
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