物理学报Issue(13)：1-12,12.DOI:10.7498/aps.64.133201
碱金属原子的光激发与光电离∗
Photo excitation and photoionization of alkali atoms
摘要
Abstract
The dynamical process of photoexcitation and photoionization of alkali atoms is studied with three-step laser pulses, focusing on the similarities and differences between Li and Cs atoms on their properties by making a comparison of them. Based on several excitation schemes, the present work not only establishes the rate equations of atom population for all related transition states, but also obtains the analytical solutions of photoexcitation and photoionization process. The mathematical solutions are simplified significantly by restricting the most general case to the several special cases, either designed or selected carefully, in order to highlight the main factors and obtain the physical insight underlying the complicated mathematical expressions. With self-programming, the possible impact of time configuration of laser pulses on the three-step laser excitation process of the photoexcitation and photoionization is calculated and studied systematically. Variation of the ionization efficiency with the laser parameters is investigated and discussed. With the same time configuration of laser pulses, the dependences of atom population for all the related transition states on the two different excitation paths are compared and analyzed, reflecting the impact of changing the atomic parameters. Under the similar excitation conditions, the differences of ionization efficiency between Li and Cs atoms are explored. Finally, based on the present study, several means for optimizing ionization efficiency are proposed.关键词
碱金属原子/光激发/光电离/电离率Key words
alkali atoms/photoexcitation/photoionization/ionization effciency引用本文复制引用
戚晓秋,汪峰,戴长建..碱金属原子的光激发与光电离∗[J].物理学报,2015,(13):1-12,12.基金项目
国家自然科学基金(批准号:11174218)资助的课题.* Project supported by the National Natural Science Foundation of China (Grant No.11174218) （批准号:11174218）
