| Electron-Helium Scattering in Free-Free Transitions in a Bichromatic Laser Field |
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| 作者姓名： | 孙金锋 梁明超 朱遵略 |
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| 作者单位： | [1]College of Physics and Information Engineering, Henan Normal University, Xinxiang 453007 [2]Department of Physics, Luoyang Normal College, Luoyang 471022 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 10574039, and the Science Foundation for Young Scientists of Henval Normal University under Grant No 2005004. |
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| 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 w and 2w, which are out of phase by an arbitrary scale φ. The variations of the differential cross section as a function of the phase angle φ in the domain 0°≤ φ ≤360° are presented. We discuss the influence of the number of photons exchanged on the phase-dependee effect. Moreover, for different scattering angles and incident electron energies, the DCS has outstanding ditferences. These illustrate that the two parameters have important effects on the differential cross section and the screening electric potential is effective.
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| 关 键 词： | 氦元素 散射 双色性 电子转移 |
| 收稿时间： | 2007-5-22 |
| 修稿时间： | 2007-05-22 |
Electron--Helium Scattering in Free--Free Transitions in a Bichromatic Laser Field |
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| SUN Jin-Feng,LIANG Ming-Chao,ZHU Zun-Lue.Electron-Helium Scattering in Free-Free Transitions in a Bichromatic Laser Field[J].Chinese Physics Letters,2007,24(9):2572-2574. |
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| Authors: | SUN Jin-Feng LIANG Ming-Chao ZHU Zun-Lue |
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| Affiliation: | 1 College of Physics and Information Engineering, Henan Normal University, Xinxiang 453007 ; 2 Department of Physics, Luoyang Normal College, Luoyang 471022 |
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| Abstract: | |
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| Keywords: | 34 80 Qb 32 80 Wr 34 50 Rk |
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