K-shell ionization cross section of aluminium induced by low-energy highly charged argon ions |
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Authors: | X. M. Chen J. X. Shao Z. H. Yang H. Q. Zhang Y. Cui X. Xu G. Q. Xiao Y. T. Zhao X. A. Zhang Y. P. Zhang |
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Affiliation: | (1) Department of Modern Physics, Lanzhou University, Lanzhou, 730000, P.R. China;(2) Institute of Modern Physics, the Chinese Academy of Science, Lanzhou, 730000, P.R. China;(3) The Normal College of Xianyang, Xianyang, 713000, P.R. China |
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Abstract: | Al K-shell X-ray yields are measured with highly charged Arq+ ions (q=12–16) bombarding against aluminium. The energy range of the Ar ions is from 180 to 380 keV. K-shell ionization cross sections of aluminium are also obtained from the yields data. The experimental data is explained within the framework of 2pπ -2pσ rotational coupling. When Ar ions with 2p-shell vacancies are incident on aluminium, the vacancies begin to reduce. Meanwhile, collisions against Al atoms lead to the production of new 2p-shell vacancies of Ar ions. These Ar 2p-shell vacancies will transfer to the 1s orbit of an Al atom via 2pπ-2pσ rotational coupling leading to the emission of a K-shell X-ray of aluminiun. A model is constructed based on the base of the above physical scenario. The calculation results of the model are in agreement with the experimental results. |
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Keywords: | 32.80.Hd Auger effect and inner-shell excitation or ionization 32.30.Rj X-ray spectra |
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