理论研究强激光场中2pz态氢原子的电离  

Theoreticalstudies on the ionization rate of 2pz hydrogen atom in an intense laser field

作　　者：初玉玲[1] 唐增华 马凤才[2] 李永庆[2] 

机构地区：[1]赤峰学院物理与电子信息工程学院,赤峰024001 [2]辽宁大学物理学院,沈阳110036

出　　处：《原子与分子物理学报》2014年第4期595-599,共5页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(11274149);辽宁省科学技术基金(20121032)

摘　　要：运用强场近似速度规范理论研究了激发态氢原子的电离情况,当ω<<1a.u.,γ<<1时(ω是激光场的频率,γ是Keldysh绝热参数),在线性极化激光场中推导了2pz态氢原子电离率的简单表达式,从公式中可以看出在低频极限的情况下,电离率和激光场频率ω成正比,这一公式对激发态氢原子电离机制的研究提供了重要的理论参考.The ionization rate of excited state hydrogen atom has been investigated using the velocity gauge and a simple ionization rate formula for the 2pz state of a hydrogen atom has been derived in the linearly polarized laser field when both conditions：ω〈〈 1 a.u.andγ〈〈 1 （ωis the laser frequency andγis the Keldysh parameter）are satisfied.The formula shows that in the low-frequency limit the ion-ization rate is proportional to the laser frequencyω.The concise formula of ionization rate may provide more insight into the ionization mechanism for the excited state of a hydrogen atom.

关 键 词：强场近似 激发态 隧穿电离 电离率 

分 类 号：O562.4[理学—原子与分子物理]