CSR上154 MeV/u C^(6+)离子束分别入射 Ti、V、Fe、Ni和Zn靶的X射线辐射  

X ray emission from 154 MeV/u C^(6+)ion beams of CSR impacting on Ti,V,Fe,Ni and Zn targets

作　　者：梅策香[1,2] 张小安[1,3] 周贤明 曾利霞[1] 梁昌慧[1] MEI Ce-Xiang;ZHANG Xiao-An;ZHOU Xian-Ming;ZENG Li-Xia;LIANG Chang-Hui(Ion beam&Optical Physical joint Laboratory of Xianyang Normal University and Institute of Modern Physics,Chinese Academy of Sciences,Xianyang 712000,China;Northwestern Polytechnical University,Laboratory of Material Physics and Chemistry under Extraordinary Conditions,Xi'an 710049,China;Institute of Modern Physics,Chinese Academy of Science,Lanzhou 730000,China)

机构地区：[1]咸阳师范学院与中国科学院近代物理研究所联合共建离子束与光物理实验室,咸阳712000 [2]西北工业大学超常条件材料物理与化学教育部重点实验室,西安710049 [3]中国科学院近代物理研究所,兰州730000

出　　处：《原子与分子物理学报》2022年第3期80-85,共6页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(11605147,11505248);超常条件材料物理与化学教育部重点实验室开放课题资助项目(MPCEC201901);中央高校基本科研业务费(310201911fz046);咸阳师范学院“青蓝人才”培养项目(XSYQL201910);咸阳师范学院教育教学改革研究项目(2017Z006);咸阳师范学院专项科研基金项目(XSYK19043、XSYK19042);陕西省教育厅专项科研计划(20JK0975);陕西省科技厅自然科学基础研究计划(2021JQ-812)。

摘　　要：用电子冷却存储环 (CSR )提供的能量为165 MeV/u的高能C^(6+) 脉冲束分别与Ti、V、Fe、Ni和Zn靶表面相互作用,测量了各靶辐射的 K 壳层X射线. 结果表明,实验探测到各靶的 K_(β) 和 K_(α) X射线均向高能区发生了不同程度的移动. 经分析,X射线发生频移是由靶原子外壳层发生多电离引起的. 通过计算各靶 K 壳层X射线的产生截面,发现该截面随原子序数的增加而减小. 将各靶 K -X射线产生截面的实验值分别与两体碰撞近似、平面波恩近似和ECPSSR理论值比较,发现现有理论与实验值存在偏差,要准确描述实验结果需要进一步修正.The K shell x-rays of Ti, V, Fe, Ni and Zn targets induced by the 165 MeV/u C^(6+) ion beam which is provided by Electron Cooling Storage Ring (CSR ) are measured. The results show that the experimental energy values of K_(β) and K_(α) X-rays which are not significantly associated with the target atomic number shift to high energy side compared to the theoretical value. It is shown that the energy shifting of X ray is caused by the multiple-ionization of the inner shell of the target atom. The K X-ray production cross section of the target decreases with the increase of atomic number. The experimental values of the K -shell X-ray production cross section of each target are compared with the binary encounter approximation (BEA ), the plane-wave Bron approximation (PWBA )and the ECPSSR theoretical predictions. It is found that there is a deviation between the existing theoretical and the experimental values, and further correction is needed to accurately describe the experimental results.

关 键 词：高能脉冲束 频移 产生截面 X射线 

分 类 号：O434.1[机械工程—光学工程]