摘要
使用100飞秒、1014W／cm2的强激光与惰性气体Ar原子相互作用,我们利用飞行时间质谱仪结合Z扫描技术获得了各次电离的Ar原子在激光焦点附近不同位置处强度分布。测量得到的各个不同电离态Arn+(n=1-4)的产额随激光焦点位置变化关系与不同电离态的空间分布理论预言相一致。
Noble gas Ar atoms are irradiated by a 100 femtosecond, 1014 W/cm2 laser field. The mutiple ionized Arn + (n = 1-4) from different points near the laser focal point are obtained using a Z-scan technique combined with time-of-flight mass spectrometer. The variation of the measured ion yield of the different charge states of Ar atoms agrees well with a theoretical prediction based on space-dependent volume scaling for different charge states.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
2004年第4期567-569,共3页
Journal of Atomic and Molecular Physics
基金
国家自然科学基金(19925416
10374036)资助
关键词
Z扫描
飞秒激光
多次电离
空间分辨
<Keyword>Z-scan
Femtosecond laser
Multiple ionization
Spatial resolving
