| ATOMIC AND MOLECULAR PHYSICS |
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Electron Correlation in Nonsequential Double Ionization of Helium by Two-Color Pulses |
| ZHOU Yue-Ming, LIAO Qing, HUANG Cheng, TONG Ai-Hong, LU Pei-Xiang |
| Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074 |
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| Cite this article: |
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ZHOU Yue-Ming, LIAO Qing, HUANG Cheng et al 2010 Chin. Phys. Lett. 27 123201 |
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Abstract We investigate the momentum and energy correlations between the two electrons from nonsequential double ionization (NSDI) of helium by strong two-color pulses with the classical three-dimensional ensemble model. The correlated momentum distribution in the direction parallel to the laser field exhibits an arc-like structure and the sum-energy spectrum shows a sharp peak for the NSDI of helium in the two-color fields. Back analysis reveals that the narrow time interval during which recollisions occur, the low returning energy and the short time delay between recollision and double ionization lead to the novel momentum and energy correlations.
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| Keywords:
32.80.Rm
31.90.+s
32.80.Fb
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Received: 03 March 2010
Published: 23 November 2010
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| PACS: |
32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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31.90.+s
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(Other topics in the theory of the electronic structure of atoms and molecules)
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32.80.Fb
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(Photoionization of atoms and ions)
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