Influence of Coulomb force between two electrons on double ionization of He-like atoms

doi:10.1088/1674-1056/ac0cdf

中国物理B ›› 2022, Vol. 31 ›› Issue (1): 13202-013202.doi: 10.1088/1674-1056/ac0cdf

Influence of Coulomb force between two electrons on double ionization of He-like atoms

Peipei Liu(刘培培), Yongfang Li(李永芳), and Jingtao Zhang(张敬涛)^†

Department of Physics, Shanghai Normal University, Shanghai 200234, China

收稿日期:2021-03-31 修回日期:2021-05-27 接受日期:2021-06-21 出版日期:2021-12-03 发布日期:2021-12-14
通讯作者: Jingtao Zhang E-mail:jtzhang@shnu.edu.cn
基金资助:
This work is supported by the National Natural Science Foundation of China (Grant Nos. 11674231 and 12074261) and the Shanghai Natural Science Foundation, China (Grant No. 20ZR1441600).

Influence of Coulomb force between two electrons on double ionization of He-like atoms

Peipei Liu(刘培培), Yongfang Li(李永芳), and Jingtao Zhang(张敬涛)^†

Department of Physics, Shanghai Normal University, Shanghai 200234, China

Received:2021-03-31 Revised:2021-05-27 Accepted:2021-06-21 Online:2021-12-03 Published:2021-12-14
Contact: Jingtao Zhang E-mail:jtzhang@shnu.edu.cn
Supported by:
This work is supported by the National Natural Science Foundation of China (Grant Nos. 11674231 and 12074261) and the Shanghai Natural Science Foundation, China (Grant No. 20ZR1441600).

摘要/Abstract

摘要： In strong-field double ionization, two electrons are ionized by intense laser field. These two electrons move in the laser field and the state is described by a Coulomb-Volkov state, where the repulsive Coulomb state describes the relative motion of the two electrons and the Volkov state describes the center-of-mass motion of the two electrons in the laser field. In the frame of scattering theory, we derive a simple analytical formula of the double ionization of He-like atoms. The effect of the Coulomb force between two electrons on the double ionization process is discussed. Numerical studies disclose that the Coulomb force enhances the ionization rate of high-energy electrons but suppresses the ionization rate of the lowest-energy electrons.

关键词: double ionization, Coulomb force, Coulomb-Volkov state, scattering theory

Abstract: In strong-field double ionization, two electrons are ionized by intense laser field. These two electrons move in the laser field and the state is described by a Coulomb-Volkov state, where the repulsive Coulomb state describes the relative motion of the two electrons and the Volkov state describes the center-of-mass motion of the two electrons in the laser field. In the frame of scattering theory, we derive a simple analytical formula of the double ionization of He-like atoms. The effect of the Coulomb force between two electrons on the double ionization process is discussed. Numerical studies disclose that the Coulomb force enhances the ionization rate of high-energy electrons but suppresses the ionization rate of the lowest-energy electrons.

Key words: double ionization, Coulomb force, Coulomb-Volkov state, scattering theory

中图分类号: (Multiphoton ionization and excitation to highly excited states)

32.80.Rm

32.80.Fb (Photoionization of atoms and ions) 34.50.Rk (Laser-modified scattering and reactions) 42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)

Peipei Liu(刘培培), Yongfang Li(李永芳), and Jingtao Zhang(张敬涛). Influence of Coulomb force between two electrons on double ionization of He-like atoms[J]. 中国物理B, 2022, 31(1): 13202-013202.

Peipei Liu(刘培培), Yongfang Li(李永芳), and Jingtao Zhang(张敬涛). Influence of Coulomb force between two electrons on double ionization of He-like atoms[J]. Chin. Phys. B, 2022, 31(1): 13202-013202.

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Influence of Coulomb force between two electrons on double ionization of He-like atoms

Influence of Coulomb force between two electrons on double ionization of He-like atoms

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