Theoretical Manifestation of the Broadening Effect on Photoelectron Angular Distributions
Zhang Jing-Tao; Zhou Lan; Zhang Wen-Qi; Xu Zhi-Zhan; Guo Dong-Sheng; R. R. Freeman
Журнал:
Chinese Physics Letters
Дата:
2003-04-01
Аннотация:
The broadening effect in photoelectron angular distributions (PADs) observed by Freeman et al. is studied theoretically. Using a nonperturbative scattering theory developed for multiphoton ionization with the inclusion of spontaneous emission, we calculate the PADs for above-threshold ionization (ATI) peaks. The numerical calculations from our theory reproduce the kinetic-energy dependence and the laser-intensity dependence of PADs of ATI peaks observed by Freeman et al., [Phys. Rev. Lett. 57 (1986) 3156] and provide an evidence for the existence of the ponderomotive momentum of intense laser fields.
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