H2双电离的超快电-核动力学
Ultrafast electro-nuclear dynamics of H2 double ionization
摘要：
本文采用含时波包方法研究了H2激光诱导双电离的超快电子和核动力学。双电离路径进行了分析，以下的总波函数的演变过程中和脉冲后。第一个电离电子的再散射产生一个相干叠加的激发分子态，呈现出明显的瞬态H+H-字符。这种阿秒激发之后是场致双电离和通过双电离衰变的短寿命自电离态的形成。这两种双电离机制可以通过它们在射出的质子的动能分布中留下的特征来识别。
英文摘要：
The ultrafast electronic and nuclear dynamics of H2 laser-induced double ionization is studied using a time-dependent wave packet approach that goes beyond the fixed nuclei approximation. The double ionization pathways are analyzed by following the evolution of the total wave function during and after the pulse. The rescattering of the first ionized electron produces a coherent superposition of excited molecular states which presents a pronounced transient H+H- character. This attosecond excitation is followed by field-induced double ionization and by the formation of short-lived autoionizing states which decay via double ionization. These two double ionization mechanisms may be identified by their signature imprinted in the kinetic-energy distribution of the ejected protons.
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