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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 |
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| Cite this article: |
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SUN Jin-Feng, LIANG Ming-Chao, ZHU Zun-Lue 2007 Chin. Phys. Lett. 24 2572-2574 |
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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.
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34.80.Qb
32.80.Wr
34.50.Rk
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Received: 22 May 2007
Published: 16 August 2007
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| PACS: |
34.80.Qb
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(Laser-modified scattering)
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32.80.Wr
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(Other multiphoton processes)
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34.50.Rk
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(Laser-modified scattering and reactions)
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[1] Ghalim M and Mastour F 1999 J. Phys. B 32 3783
[2] Varro S and Ehlotzky F 1995 J. Phys. B 28 1613
[3] Varro S and Ehlotzky F 1997 J. Phys. B 30 1061
[4] Cionga A, Ehlotzky F and Zloh G 2001 J. Phys. B 34 2057
[5] Zhang S T and Chen J 2001 J. Phys. B 34 2201
[6] Varro S and Ehlotzky F 1993 Phys. Rev. A 47 715
[7] Protopapas M, Knight P L and Burnett K 1994 Phys. Rev. A 49 1945
[8] Milo\v sevic D B and Ehlotzky F 1997 Phys. Rev. A 56 3879
[9] Kaminski J Z and Ehlotzky F 1994 Phys. Rev. A 50 4404
[10] Zhang S T, Chen J and Li S M 2002 Can. J. Phys. 80 969
[11] Mittleman M H 1993 Introduction to the Theory of Laser-AtomInteractions (New York: Plenum) p 110
[12] Weingartshofer A, Holmes J K, Sabbagh J and Chin S L 1983 J.Phys. B 16 1805
[13] Salvat F, Mart\i nez J D, Mayol R and Parellada J 1987 Phys.Rev. A 36 467
[14] Sun J F, Zhang S G, Jiang Y H and Yu G Q 1998 Phys. Rev. A 58 2225
[15] Zhu Z L, Jiang Y H and Sun J F 2000 Chin. Phys. 9 419 |
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