Enhancement and control of H2 dissociative ionization by femtosecond VUV laser pulses.
Enhancement and control of H2 dissociative ionization by femtosecond VUV laser pulses.
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DOI：
10.1103/physrevlett.96.143001
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发表时间：
2006-04
影响因子：
8.6
通讯作者：
A. Palacios;H. Bachau;F. Martín
中科院分区：
文献类型：
--
作者：
A. Palacios;H. Bachau;F. Martín
我们报道了用VUV/fs 10(12) W/cm2激光脉冲从头计算H2电离，包括相关和所有电子和振动自由度（DOF）。包含核自由度导致共振增强多光子电离的大幅增加。通过改变脉冲持续时间，可以控制解离与非解离电离的比例以及最终的H+(2)振动分布。对于大于10fs且与ω >0.46 a.u成比例的脉冲，解离电离完全占主导地位，这在光电离研究中是非常不寻常的情况。
We report ab initio calculations of H2 ionization by VUV/fs 10(12) W/cm2 laser pulses including correlation and all electronic and vibrational degrees of freedom (DOF). Inclusion of the nuclear DOF leads to a substantial increase of resonance enhanced multiphoton ionization. By varying pulse duration, it is possible to control the ratio of dissociative to nondissociative ionization as well as the final H+(2) vibrational distribution. For pulses longer than 10 fs and proportional to omega>0.46 a.u., dissociative ionization entirely dominates, which is a very unusual situation in photoionization studies.