高电荷态离子Ar^(q+)与不同金属靶作用产生的X射线  

X-ray emission produced by interaction of highly ionized Ar^(q+) ions with metallic targets

作　　者：杨治虎[1] 宋张勇[1] 陈熙萌[2] 张小安[3] 张艳萍[1] 赵永涛[1] 崔莹[2] 张红强[2] 徐徐[2] 邵健雄[2] 于得洋[1] 蔡晓红[1] 

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]兰州大学现代物理系,兰州730000 [3]咸阳师范学院物理系,咸阳712000

出　　处：《物理学报》2006年第5期2221-2227,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10274088;10375080;10574132);科技部重大基础研究前期研究专项基金(批准号:2002CCA00900);等离子体物理国家级科技重点实验室基金(批准号:51480020104ZK5101)资助的课题~~

摘　　要：研究了高电荷态离子Arq+(q=16,17,18)入射金属Be,Al,Ni,Mo,Au靶表面产生的X射线谱.实验结果表明,Ar的Kα-X射线是离子在与固体表面相互作用过程中固体表面之下形成空心原子发射的.电子组态1s2的高电荷态Ar16+离子在金属表面中性化过程中,存在的多电子激发过程使Ar16+的K壳层电子激发产生空穴,级联退激发射Ar的Kα特征X射线.Ar17+离子在金属表面作用过程中产生的X射线谱形与靶材料没有明显的关联,入射离子的Kα-X射线产额与其最初的电子组态有关,靶原子的X射线产额与入射离子的动能有关.This paper studies the X-ray spectra produced by the interaction of highly charged ions of Ar^q＋ （ q = 16, 17,18） with metallic surface of Be, Al, Ni, Mo and Au respectively. The experimental results show that the Kα X-ray emerges from under the surface of solid in the interaction of ions with targets. The multi-electron excitation occurred in the process neutralization of the Ar^16＋ in electronic configuration of 1s^2 in metallic surfaces, which produces vacancy in the K shell. Electron from high n state transition to K vacancy gives off X-ray. We find that there is no obvious relation between the shape of X-ray spectra and the different targets. The X-ray yield of incident ions are associated with initial electronic configuration. The X-ray yield of target is related to the kinetic energy of the incident ions.

关 键 词：高电荷态离子 空心原子 多电子激发 X射线 

分 类 号：O571.6[理学—粒子物理与原子核物理]