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我们在Hartree-Slater自洽场理论的基础上,以Cs,Xe原子为例,具体计算了其双光子电离截面。本文的理论方法可容易地应用于其它双光子过程的计算,同时还可推广到更多光子过程的计算。将计算结果和相应的实验以及其它理论结果作了比较和讨论。明确了本文理论计算的精确程度,对碱金属元素(例如Cs)本文的理论值与最近的精确实验符合得较好。Based on a Hartree-Slater self-consistent theory, we calculate two-photon ionization cross-sections of Cs and Xe as illustrative examples. Our theoretical method can easily be applied to calculate other types of two-photon transitions and can also be extended to calculate higherorder multiphoton ionization processes. Comparing our theoretical results with available experimental data and other theoretical results, we can discuss the validity of our theoretical method. For two-photon ionization processes of alkali atoms (e.g. Cs), our results are in good agreement with recent accurate experimental measurements.
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