高电荷态离子入射Al表面库仑势对靶原子特征谱线强度的影响  

The coulomb potential energy effect on the intensity of the characteristic lines at highly charged ion incendence on Al surface

作　　者：王立[1] 张小安[1] 杨治虎[1] 陈熙萌[2] 张红强[2] 崔莹[2] 绍剑雄[2] 徐徐[2] 

机构地区：[1]中国科学院近代物理研究所 [2]兰州大学物理系,兰州730000

出　　处：《物理学报》2008年第1期137-142,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10574132);陕西省教育厅专项基金(批准号:04JK300);咸阳师范学院科研基金(批准号:05XSYK103)资助的课题~~

摘　　要：用同一动能(150keV)而不同电荷态的40Arq+(8≤q≤16)离子入射金属Al表面,靶原子受激辐射产生特征光谱线.实验结果表明:高电荷态离子与金属表面相互作用过程中,经过与靶原子碰撞(Penning碰撞)交换动能和共振电子俘获(resonant capture)释放库仑势能,将携带的能量沉积于靶表面,使靶原子激发.这种激发不同于光激发,它不仅激发了原子复杂电子组态之间的跃迁,而且跃迁辐射的特征谱线强度增强的趋势与入射粒子的库仑势能随其电荷态增加的趋势一致.The A1 atomic characteristic spectral lines were induced by the impact of ^40Ar^q＋ ions （8≤q ≤16; kinetic energy 150 keV） on A1 surface. The result shows that by Penning impinging and resonant capture, the ion energy is deposited on the A1 surface to excite the target atom, which is different from light excitation. Not only are the transitions betweem electronic configurations of the atomic complex excited, but the enhancing tendency of the characteristic spectral line intensity is consistent with the enhancing tendency of the coulomb potential energy of the incident ions with increasing charged states.

关 键 词：高电荷态离子 库仑势 特征光谱 光谱强度 铝离子 

分 类 号：O562[理学—原子与分子物理]