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arXiv 0802.1197physics.atom-ph
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Laser辅助电子碰撞氢原子的多光子电离

Laser-assisted multiphoton ionization of a hydrogen atom by electron impact

S. Ghosh Deb, S. Roy, C. Sinha

摘要:

本文从理论上研究了强激光场中氢原子的电子碰撞多光子电离动力学,并与Horr等[Phys.Rev.Lett.,vol.94,153201,(2005)]。显著的激光修改指出,在目前的双重(DDCS)和全差分截面(TDCS)。对于大多数探索的运动学(根据实验选择),目前的二进制峰值强度的激光辅助TDCS显着增强相对于自由场的,与实验一致,但与现有的一阶理论相矛盾。研究了多光子效应的重要性。

英文摘要:

The dynamics of the electron impact multiphoton ionization of a hydrogen atom in the presence of an intense laser field has been studied theoretically, with a view to comparing (qualitatively) the results with the recent kinematically complete experiments of Horr et al [ Phys. Rev. Lett., vol. 94, 153201, (2005) ] for the He target. Significant laser modifications are noted in the present doubly (DDCS) and the fully differential cross sections (TDCS). For most of the explored kinematics (chosen in accordance with the experiment), the present binary peak intensity of the laser-assisted TDCS is significantly enhanced with respect to the field free ones, in agreement with the experiment but in contradiction with the existing first order theories. Importance of the multiphoton effects are also studied.

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