Modeling the sequential dissociative double ionization of O2 by ultrashort intense infrared laser pulses

被引:6
|
作者
Yuen, C. H. [1 ]
Modak, P. [1 ]
Song, Yan [2 ]
Zhao, Song-Feng [2 ]
Lin, C. D. [1 ]
机构
[1] Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA
[2] Northwest Normal Univ, Key Lab Atom & Mol Phys & Funct Mat Gansu Prov, Coll Phys & Elect Engn, Lanzhou 730070, Peoples R China
基金
中国国家自然科学基金;
关键词
PREDISSOCIATION; NITROGEN; SPECTRA; O-2(2+);
D O I
10.1103/PhysRevA.107.013112
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A density matrix approach for sequential double ionization (DM-SDI) of molecules has been developed recently and was applied to the N2 molecule [Yuen and Lin, Phys. Rev. A 106, 023120 (2022)]. In this article, we extended the DM-SDI model to O2, which is a more complicated system to model than N2, due to its electronic structures and spin-orbit and laser couplings in the manifold of doubly charged states. We obtained a good agreement on the kinetic energy release spectrum of O+ + O+ from previous experiments. Thanks to the low computational cost of the model, we explored the mechanism behind the ionization and dissociation dynamics as well as the effects of lasers on the spectrum. This work will pave the way to model sequential dissociative double ionization of larger molecules and to probe molecular dynamics by measuring kinetic energy release spectra from this process.
引用
收藏
页数:10
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