The modeling non-sequential double ionization of helium atom under highintensity femtosecond laser pulses with shielding charge approximation  

作　　者：Marjan Zakavi Mohammad Sabaeian 

机构地区：[1]Department of Physics,Faculty of Science,Shahid Chamran University of Ahvaz,Iran [2]Center for Research on Laser and Plasma,Shahid Chamran University of Ahvaz,Iran

出　　处：《Communications in Theoretical Physics》2024年第2期151-156,共6页理论物理通讯（英文版）

基　　金：Shahid Chamran University of Ahvaz for supporting this research under the grant number SCU.SP1401.259。

摘　　要：In this study,we successfully extracted the‘knee structure’for non-sequential double ionization(NSDI)in the helium atom.To achieve this,for the first time,we solved the time-dependent Schrödinger equation in three dimensions for the helium atom,utilizing the shielding charge approximation.Our findings corroborate prior observations by Wang et al[Wang and Eberly,Phys.Rev.Lett.105,083001(2010)],demonstrating that NSDI occurs within a narrower time window in circular polarization compared to linear polarization.As a result,the yield of linear polarization was higher than that of circular polarization,aligning with the previously reported results.Notably,in the case of circular polarization,the time window further narrows with increasing intensity,attributed to a decrease in the time-of-flight.

关 键 词：NSDI knee structure TDSE shielding charge helium 3D-TDSE 

分 类 号：TN249[电子电信—物理电子学] O562[理学—原子与分子物理]