期刊论文

Characteristics of K-shell X-ray emission in collisions of low-energy highly charged nitrogen ions with a Cu surface

Song, Z.;Guo, Y.

中文

核技术

0253-3219

2021

44

12

69-75

10.11889/j.0253-3219.2021.hjs.44.120502

国家自然科学基金(No.1 1675279 、No.12075291)资助 第一作者：刘璇，男，1995年出生，2019年毕业于烟台大学，现为硕士研究生，研究领域为原子与分子物理 通信作者：宋张勇，E-mail：songzhy@impcas.ac.cn；郭艳玲，E-mail：guoyanling@lzu.edu.cn 收稿日期：2021-09-21，修回日期：2021-10-19 Supported by National Natural Science Foundation of China (No.1 1675279 , No.12075291) Firstauthor:LIUXuan,male,bornin1995,graduatedfromY antai Universityin2019,masterstudent,focusingonatomicandmolecularphysics Corresponding author: SONG Zhangyong, E-mail: songzhy@impcas.ac.cn; GUO Y anling , E-mail: guoyanling@lzu.edu.cn Received date: 2021-09-21, revised date: 2021-10-19

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利用中国科学院近代物理研究所的电子回旋共振离子源引出的高电荷态氮离子(N~(q+),q=3,5,6),在4.5~120 keV动能范围内系统测量了Nq(+ q=3,5,6)与Cu表面碰撞产生的K-X射线能谱;基于原子壳层电离理论计算了K-X射线产额值及其电离截面值。结果表明:Nq(+ q=3,5)离子进入靶表面后与Cu原子发生紧密碰撞,在直接库伦电离的作用下发射K-X射线,并且随着入射离子动能的增加,K-X射线产额和K壳层电离截面均单调增大;对于N~(6+)离子,K-X射线产额与其入射动能没有明显的依赖关系,且在Cu表面形成的“空心原子”级联退激产生的K-X射线产额约占其总K-X射线产额的97%。另外,N5+离子入射时的K-X射线产额明显高于N3+离...

Background: The highly charged nitrogen ions (Nq+, q=3, 5, 6) are one of the main charged ions in the solar wind. Study of K-shell X-ray emissions in collisions of Nq+ (q=3, 5, 6) ions with a Cu surface is of great significance for understanding the de-excitation process of "hollow atoms" and the generation mechanism of comet X-rays. Purpose: This study aims to investigate characteristics of K-shell X-ray emission in impacts of Nq+ (q=3, 5, 6) ions with a Cu surface. Methods: The Nq+ (q=3, 5, 6) ion beam was generated by the electron cyclotron ...