Ionization in an intense field considering Coulomb correction  

作　　者：Jian Li Yi-Ning Huo Zeng-Hua Tang Feng-Cai Ma 李健;霍一宁;唐增华;马凤才(School of Physical Science and Technology,Inner Mongolia University;Department of Science,Shenyang Aerospace University;Department of Physics,Liaoning University)

机构地区：[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

出　　处：《Chinese Physics B》2017年第2期171-175,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11274149 and 11304185);the Program of Shenyang Key Laboratory of Optoelectronic Materials and Technology,China(Grant No.F12-254-1-00)

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 y 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.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 y 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 

分 类 号：O562.4[理学—原子与分子物理]