| ATOMIC AND MOLECULAR PHYSICS |
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Universality of the Dynamic Characteristic Relationship of Electron Correlation in the Two-Photon Double Ionization Process of a Helium-Like System |
| Fei Li1,6, Yu-Jun Yang2, Jing Chen3,4, Xiao-Jun Liu5, Zhi-Yi Wei1,6*, and Bing-Bing Wang1,6* |
1Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
3Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
4HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100084, China
5State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China
6University of Chinese Academy of Sciences, Beijing 100049, China
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| Cite this article: |
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Fei Li, Yu-Jun Yang, Jing Chen et al 2020 Chin. Phys. Lett. 37 113201 |
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Abstract Universality of the dynamic characteristic relationship between the characteristic time $t_{\rm c}$ and the two-electron Coulomb interaction energy $\overline{V}_{12}$ of the ground state in the two-photon double ionization process is investigated via changing the parameters of the two-electron atomic system and the corresponding laser conditions. The numerical results show that the product $t_{\rm c}\overline{V}_{12}$ keeps constant around 4.1 in the cases of changing the nucleus charge, the electron charge, the electron mass, and changing simultaneously the nucleus charge and the electron charge. These results demonstrate that the dynamic characteristic relationship in the two-photon double ionization process is universal. This work sheds more light on the dynamic characteristic relationship in ultrafast processes and may find its application in measurements of attosecond pulses.
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Received: 27 August 2020
Published: 08 November 2020
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| PACS: |
32.80.-t
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(Photoionization and excitation)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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| Fund: Supported by the National Natural Science Foundation of China (Grant Nos. 91850209, 11774129, and 11774411), and the National Key Research and Development Program of China (Grant Nos. 2019YFA0307700 and 2016YFA0401100). |
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