Eur. Phys. J. D 41, 281-286 (2007)
https://doi.org/10.1140/epjd/e2006-00233-9

K-shell ionization cross section of aluminium induced by low-energy highly charged argon ions^*

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

Corresponding author: ^a Chenxm@lzu.edu.cn

Received: 24 February 2006
Revised: 1 July 2006
Published online: 20 October 2006

Abstract

Al K-shell X-ray yields are measured with highly charged Ar^q+ 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.