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Semiclassical Approach to Non-Sequential Double Ionization of Diatomic Molecules in Strong Laser Field |
| LIU Jie1;CHEN Jing1,2 |
| 1Institute of Applied Physics and Computational Mathematics, PO Box 8009(28), Beijing 100088
2Department of Chemistry, University of Kansas and Kansas Center for Advanced Scientific Computing, Lawrence, KS 66045, USA |
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| Cite this article: |
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LIU Jie, CHEN Jing 2006 Chin. Phys. Lett. 23 91-94 |
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Abstract We develop a semiclassical model to describe the non-sequential double ionization of diatomic molecules in an intense linearly polarized field, achieving insight into the two-electron correlation effect in the ionization dynamics. Compared to the experimental data of nitrogen molecules, our model shows a good agreement in the tunnelling regime and a qualitative agreement in the over-barrier regime. We find that the classical collisional trajectories are the main source of the double ionization in the tunnelling regime. As a prediction of our theory, we also calculate the double ionization ratios of H222+H22+ for hydrogen molecules and predict a ratio less than that of nitrogen molecules.
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| Keywords:
33.80.Rv
34.50.Rk
42.50.Hz
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Published: 01 January 2006
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| PACS: |
33.80.Rv
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(Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))
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34.50.Rk
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(Laser-modified scattering and reactions)
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42.50.Hz
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(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
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