| ATOMIC AND MOLECULAR PHYSICS |
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Suppression of Recollision-Excitation Ionization in Nonsequential Double Ionization of Molecules by Mid-Infrared Laser Pulses |
| ZHANG Dong-Ling, TANG Qing-Bin**, GAO Yang |
College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000
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| Cite this article: |
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ZHANG Dong-Ling, TANG Qing-Bin, GAO Yang 2013 Chin. Phys. Lett. 30 023203 |
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Abstract The electron dynamics in strong field non-sequential double ionization of nitrogen molecules is investigated with the three-dimensional (3D) classical ensemble model. The numerical results show that the longitudinal momentum spectrum of the doubly charged ions evolves from a wide single-hump structure at the near-infrared (NIR) regime into a double-hump structure when the wavelength enters the mid-infrared (MIR) regime. Back analysis reveals that in the MIR regime, the recollision excitation with subsequent ionization (RESI) is strongly suppressed with increasing wavelength, which results in the double-hump structure of the ions momentum spectra. This double-hump structure becomes more pronounced as the wavelength further increases because the contribution of the RESI further decreases.
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Received: 23 October 2012
Published: 02 March 2013
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| PACS: |
32.80.Fb
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(Photoionization of atoms and ions)
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32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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