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
ZHOU Lan
ZHANG Wen-Qi
XU Zhi-Zhan
GUO Dong-Sheng
R. R. Freeman
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