Electron--Helium Scattering in Free--Free Transitions in a Bichromatic Laser Field
SUN Jin-Feng 1,2, LIANG Ming-Chao1, ZHU Zun-Lue1
1College of Physics and Information Engineering, Henan Normal University, Xinxiang 4530072Department of Physics, Luoyang Normal College, Luoyang 471022
Electron--Helium Scattering in Free--Free Transitions in a Bichromatic Laser Field
SUN Jin-Feng 1,2;LIANG Ming-Chao1;ZHU Zun-Lue1
1College of Physics and Information Engineering, Henan Normal University, Xinxiang 4530072Department of Physics, Luoyang Normal College, Luoyang 471022
摘要Theoretical calculation of the differential cross section (DCS) for elastic electron--helium scattering in the presence of a bichromatic CO2 laser field is carried out in the first Born approximation with a simple screening electric potential. The two components of the laser field have the frequencies ω and 2ω, which are out of phase by an arbitrary scale vp. The variations of the differential cross section as a function of the phase angle vp in the domain 0°≤ψ≤ 360°are presented. We discuss the influence of the number of photons exchanged on the phase-dependence effect. Moreover, for different scattering angles and incident electron energies, the DCS has outstanding differences. These illustrate that the two parameters have important effects on the differential cross section and the screening electric potential is effective.
Abstract：Theoretical calculation of the differential cross section (DCS) for elastic electron--helium scattering in the presence of a bichromatic CO2 laser field is carried out in the first Born approximation with a simple screening electric potential. The two components of the laser field have the frequencies ω and 2ω, which are out of phase by an arbitrary scale vp. The variations of the differential cross section as a function of the phase angle vp in the domain 0°≤ψ≤ 360°are presented. We discuss the influence of the number of photons exchanged on the phase-dependence effect. Moreover, for different scattering angles and incident electron energies, the DCS has outstanding differences. These illustrate that the two parameters have important effects on the differential cross section and the screening electric potential is effective.
SUN Jin-Feng;LIANG Ming-Chao;ZHU Zun-Lue. Electron--Helium Scattering in Free--Free Transitions in a Bichromatic Laser Field[J]. 中国物理快报, 2007, 24(9): 2572-2574.
SUN Jin-Feng, LIANG Ming-Chao, ZHU Zun-Lue. Electron--Helium Scattering in Free--Free Transitions in a Bichromatic Laser Field. Chin. Phys. Lett., 2007, 24(9): 2572-2574.
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