理论研究强激光场中2 pz态氢原子的电离

摘要

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.%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ω1 a.u .，γ1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.