摘要
在外加静电场下，准分子激光诱导等离子体中Ｍｇ原子５５２．８４、５１６．７３、４７０．３０ｎｍ三条发射谱线展宽的时间分辨特性的实验研究，实验测定结果表明，外加静电场导致了原子发射谱线展宽超过Ｓｔａｒｋ展宽，这种额外展宽的大小在０．１ｎｍ左右，其中４７０．３ｎｍ谱线的加宽和线移最大，采用量子理论计算表明这种额外展宽是由于在外电场中作用下作定向运动的电子与激发态原子碰撞所致。
Based on the measurement of the brodening' of the three emission lines with 552.84. 516. 73 and 470. 30urn of the Mg atom, the time resolved character of the excimerlaser produced plasma was investigated under additional static electrig field. Obtainedfrom the experiment the additional brodening of emission lines of atom spectra was inthe region about 0. Inm and was caused by the additional static electric field. Among thethree lines the value of this brodening for 470. 30urn spectral line was the largest. It wasproved from the quantum theory that this additional brodening was due to the unelasticcollision between the excited atoms and the electrons moving in a definit direction withthe additional static electric field.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
1996年第2期181-188,共8页
Journal of Atomic and Molecular Physics
关键词
激光微等离子体
外电场
等离子体
发射光谱
Laser produced microplasma
Additonal static electric field
Emission spectra of plasma
Additional brodening of spectral lines
