Multiple fragmentation of atoms in femtosecond laser pulses
Multiple fragmentation of atoms in femtosecond laser pulses
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DOI：
10.1088/0953-4075/38/9/021
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发表时间：
2005-05-14
影响因子：
1.6
通讯作者：
Moshammer, R
中科院分区：
文献类型：
--
作者：
Becker, A;Dörner, R;Moshammer, R
超短强激光脉冲作用下原子的多重电离是一个与电子与外场高度非线性相互作用密切相关的少体问题。我们回顾了最近的进展，揭示了异常大的离子产额背后的机制，在一个强激光脉冲中观察到的双重和多重电离。它的研究一方面需要高微分实验技术与高重复频率激光系统相结合，另一方面需要发展新的理论方法，同时考虑粒子之间的长程库仑相互作用和场的非线性。不同的机制进行了图解和定量分析，与实验数据的总离子产率。符合测量的电子和离子动量的分布进行了讨论沿着与各种理论方法的预测。
Multiple ionization of atoms by an ultrashort intense laser pulse is a process in which the few-body problem is closely interrelated with the highly nonlinear interaction between the electrons and the external field. We review recent advances in unveiling the mechanisms behind the unusually large ion yields for double and multiple ionization observed in a strong laser pulse. Its study requires on one hand the combination of highly differential experimental techniques with laser systems having high repetition rates and on the other the development of new theoretical methods to simultaneously account for the long ranged Coulomb interaction between the particles and the field nonlinearity. Different mechanisms are analysed diagrammatically and quantitatively in comparison with experimental data for the total ion yields. Distributions for the electron and ion momenta of coincidence measurements are discussed along with predictions of the various theoretical methods.