Semiclassical model of the electron-impact ionization of hydrogen in the presence of a strong laser field

被引:5
|
作者
Sanz, JL [1 ]
Kull, HJ [1 ]
机构
[1] Univ Technol Aachen, Inst Theoret Phys A, D-52056 Aachen, Germany
来源
PHYSICAL REVIEW A | 1999年 / 60卷 / 05期
关键词
D O I
10.1103/PhysRevA.60.3896
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Electron-impact ionization of hydrogen in the presence of a strong laser field is studied in the framework of the time-dependent Hartree-Fock theory. The probability distribution of the impact electron is further approximated by a plane circular disk, moving on a classical path along the polarization direction of the laser field. The remaining time-dependent Schrodinger equation for the hydrogen atom is solved numerically by finite-difference methods for different impact parameters, electron energies, and laser intensities. The integrated cross section for field-free impact ionization is found to agree remarkably well with previous results in the intermediate and high energy range (60-600 eV). Field ionization and collisional ionization can be simultaneously calculated with this model. [S1050-2947(99)03111-X].
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页码:3896 / 3902
页数:7
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