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首页> 外文会议>NATO Advanced Research Workshop on Super-Intense Laser-Atom Physics Sep 24-30, 2000 Han-sur-Lesse, Belgium >ANGULAR DISTRIBUTIONS FOR DOUBLE IONIZATION BY AN ULTRASHORT, INTENSE LASER PULSE: THE CASE OF LI~-
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ANGULAR DISTRIBUTIONS FOR DOUBLE IONIZATION BY AN ULTRASHORT, INTENSE LASER PULSE: THE CASE OF LI~-

机译：超短脉冲强激光脉冲双重电离的角分布：以Li〜-为例

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摘要

We have solved the three dimensional time-dependent Schroedinger equation for the Li~- ion interacting with an ultrashort, intense, linearly polarized laser pulse, using a two-active electron approximation that accounts for polarization effects of the Li~+ core. The technique used for obtaining angular distributions for double ionization by ultrashort laser pulses applies for both weak and intense pulses, and could be extended to treat any two-electron system. In the weak field regime, we recover essential features of angular distributions for the one-photon double ionization, namely selection rules and strong correlation effects between electrons. In the multiphoton regime, we find that electrons may possibly be ejected in all directions, but with peaks along directions parallel and perpendicular to the polarization axis of the field. For intensities used in the multiphoton regime, configurations where electrons are ejected in opposite directions are more likely that those for ejection in the same direction.
机译：我们使用考虑了Li〜+磁芯极化效应的双活性电子逼近法，解决了锂离子与超短，强，线性极化激光脉冲相互作用的三维时变Schroedinger方程。用于通过超短激光脉冲获得双电离的角度分布的技术适用于弱脉冲和强脉冲，并且可以扩展为处理任何两电子系统。在弱场状态下，我们恢复了单光子双电离的角度分布的基本特征，即选择规则和电子之间的强相关效应。在多光子状态下，我们发现电子可能在所有方向上都射出，但沿平行于并垂直于电场极化轴的方向具有峰值。对于在多光子状态下使用的强度，在相反方向上发射电子的配置比在相同方向上发射电子的配置更有可能。

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