Theoretical Manifestation of the Broadening Effect on Photoelectron Angular Distributions

Chin. Phys. Lett.

2003, Vol. 20

Issue (4): 496-498 DOI:

Original Articles

Theoretical Manifestation of the Broadening Effect on Photoelectron Angular Distributions

ZHANG Jing-Tao¹;ZHOU Lan²;ZHANG Wen-Qi¹;XU Zhi-Zhan¹;GUO Dong-Sheng²;R. R. Freeman³

¹Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, PO Box 800-211, Shanghai 201800 ²Department of Physics, Southern University and A&M College, Baton Rouge, Louisiana 70813, USA ³Department of Applied Science, University of California, Davis, California 95616, USA

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ZHANG Jing-Tao, ZHOU Lan, ZHANG Wen-Qi et al 2003 Chin. Phys. Lett. 20 496-498

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Abstract 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 existance of the ponderomotive momentum of intense laser fields.

Keywords: 32.80.Rm 42.65.Ky 12.20.Ds 03.65.Nk

Published: 01 April 2003

PACS:	32.80.Rm	(Multiphoton ionization and excitation to highly excited states)
	42.65.Ky	(Frequency conversion; harmonic generation, including higher-order harmonic generation)
	12.20.Ds	(Specific calculations)
	03.65.Nk	(Scattering theory)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2003/V20/I4/0496

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	ZHANG Jing-Tao
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	R. R. Freeman

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