Ionization in an intense field considering Coulomb correction

doi:10.1088/1674-1056/26/2/023203

中国物理B ›› 2017, Vol. 26 ›› Issue (2): 23203-023203.doi: 10.1088/1674-1056/26/2/023203

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Ionization in an intense field considering Coulomb correction

Jian Li(李健), Yi-Ning Huo(霍一宁), Zeng-Hua Tang(唐增华), Feng-Cai Ma(马凤才)

1 School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China;
2 Department of Science, Shenyang Aerospace University, Shengyang 110036, China;
3 Department of Physics, Liaoning University, Shenyang 110031, China

收稿日期:2016-02-28 修回日期:2016-11-05 出版日期:2017-02-05 发布日期:2017-02-05
通讯作者: Jian Li, Feng-Cai Ma E-mail:lijian@sau.edu.cn;fcma@lnu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11274149 and 11304185) and the Program of Shenyang Key Laboratory of Optoelectronic Materials and Technology, China (Grant No. F12-254-1-00).

Ionization in an intense field considering Coulomb correction

Jian Li(李健)^1,2, Yi-Ning Huo(霍一宁)³, Zeng-Hua Tang(唐增华)³, Feng-Cai Ma(马凤才)³

1 School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China;
2 Department of Science, Shenyang Aerospace University, Shengyang 110036, China;
3 Department of Physics, Liaoning University, Shenyang 110031, China

Received:2016-02-28 Revised:2016-11-05 Online:2017-02-05 Published:2017-02-05
Contact: Jian Li, Feng-Cai Ma E-mail:lijian@sau.edu.cn;fcma@lnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11274149 and 11304185) and the Program of Shenyang Key Laboratory of Optoelectronic Materials and Technology, China (Grant No. F12-254-1-00).

摘要/Abstract

摘要： We derive a simple ionization rate formula for the ground state of a hydrogen atom in the velocity gauge under the conditions: ω<<1 a.u. (a.u. is short for atomic unit) and γ<<1 (ω is the laser frequency and γ is the Keldysh parameter). Comparisons are made among the different versions of the Keldysh-Faisal-Reiss (KFR) theory. The numerical study shows that with considering the quasi-classical (WKB) Coulomb correction in the final state of the ionized electron, the photoionization rate is enhanced compared with without considering the Coulomb correction, and the Reiss theory with the WKB Coulomb correction gives the correct result in the tunneling regime. Our concise formula of the ionization rate may provide an insight into the ionization mechanism for the ground state of a hydrogen atom.

关键词: strong field approximation, ionization rate, Coulomb potential

Abstract: We derive a simple ionization rate formula for the ground state of a hydrogen atom in the velocity gauge under the conditions: ω<<1 a.u. (a.u. is short for atomic unit) and γ<<1 (ω is the laser frequency and γ is the Keldysh parameter). Comparisons are made among the different versions of the Keldysh-Faisal-Reiss (KFR) theory. The numerical study shows that with considering the quasi-classical (WKB) Coulomb correction in the final state of the ionized electron, the photoionization rate is enhanced compared with without considering the Coulomb correction, and the Reiss theory with the WKB Coulomb correction gives the correct result in the tunneling regime. Our concise formula of the ionization rate may provide an insight into the ionization mechanism for the ground state of a hydrogen atom.

Key words: strong field approximation, ionization rate, Coulomb potential

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

32.80.Rm

33.80.Rv (Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))

李健, 霍一宁, 唐增华, 马凤才. Ionization in an intense field considering Coulomb correction[J]. 中国物理B, 2017, 26(2): 23203-023203.

Jian Li(李健), Yi-Ning Huo(霍一宁), Zeng-Hua Tang(唐增华), Feng-Cai Ma(马凤才). Ionization in an intense field considering Coulomb correction[J]. Chin. Phys. B, 2017, 26(2): 23203-023203.

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Ionization in an intense field considering Coulomb correction

Ionization in an intense field considering Coulomb correction

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