Arq＋入射金表面激发靶原子Mα-X射线的动能和势能的阈值

Thresholds for kinetic and potential energies of Ar^(q+) induced Au target atomic M_α-X rays emission

在兰州重离子加速器国家实验室用动能150 keV和1.2 MeV的Ar^(q+)束流分别入射Au表面,测量了离子与表面相互作用过程中辐射的X射线谱.结果表明,多电荷态Ar^(q+)激发Au原子的M_α-X射线至少需要2 keV的势能.本文采用半经典两体碰撞近似,估算了炮弹离子通过碰撞激发靶原子辐射X射线的动能阈值.

The X ray emissions from Ar5＋（the kinetic energy 150 keV and 1.2 MeV） beams impinging on Au surface are measured.The results show that the about 2 keV minimum-potential energy of Ar11＋ and Ar12＋（150 keV） is necessary for exciting Au atoms to emit Ma-X rays.The kinetic energy threshold for exciting target atomic X ray emission is estimated by the semiclassical approximation theory of binary collision.