LETTER TO THE EDITOR: S-matrix analysis of ionization yields of noble gas atoms at the focus of Ti:sapphire laser pulses
LETTER TO THE EDITOR: S-matrix analysis of ionization yields of noble gas atoms at the focus of Ti:sapphire laser pulses
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DOI：
10.1088/0953-4075/32/14/101
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发表时间：
1999-07
期刊：
影响因子：
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通讯作者：
A. Becker;F. Faisal
中科院分区：
文献类型：
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作者：
A. Becker;F. Faisal
我们使用最近开发的复杂原子激光诱导 n 次电离的动力学模型，分析了在强飞秒 Ti:蓝宝石激光脉冲存在下整个惰性气体原子序列形成不同电荷态的实验数据。计算了 He、Ne、Ar、Kr 和 Xe 的单电离和双电离的离子产率及其比率，结果发现与相应的实验数据非常吻合（氖可能除外）。接下来，我们将 Ar 三重电离的实验离子产率与目前的理论结果进行比较，这些结果在整个强度范围内也表现出极好的一致性，并再现了测量的膝盖结构。我们的分析表明，最多三个电子的直接逃逸可以显着提高迄今为止观察到的 Ar 最高电荷态（即 Ar3+）的离子产率。最后，为了将来的实验参考，我们提出了中性 Ar 或 Ar+ 离子高达六倍电离产率的预测结果。
We analyse the experimental data for the formation of different charge states of a whole sequence of noble gas atoms in the presence of intense femtosecond Ti:sapphire laser pulses, using a recently developed dynamical model of laser-induced n-fold ionization of a complex atom. The ion yields for single and double ionization, as well as their ratios, are calculated for He, Ne, Ar, Kr and Xe and are found to agree remarkably well with the corresponding experimental data (with the possible exception of Ne). Next, we compare the experimental ion yields for the triple ionization of Ar with the present theoretical results which also show excellent agreement over the entire intensity range and reproduce the measured knee structures. Our analysis indicates that direct escapes of up to three electrons can contribute significantly to the ion yields for the highest charge state of Ar (namely, Ar3+) observed so far. Finally, for the purpose of future experimental references, we present the predicted results for the yields of up to sixfold ionization from neutral Ar or Ar+ ion.