%0 Journal Article
%T Double-Exponentially Decayed Photoionization in CREI Effect: Numerical Experiment on 3D H2+<br>Double-Exponentially Decayed Photoionization in CREI Effect： Numerical Experiment on 3D H2^＋
%A LI Feng
%A WANG Ting-Ying
%A ZHANG Gui-Zhong
%A XIANG Wang-Hua
%A W T Hill III
%A <br>李峰
%A 王廷营
%A 张贵忠
%A 向望华
%A 希尔三世
%J 中国物理快报
%D 2008
%I 
%X On the platform of the 3D H2+ system, we perform a numerical simulation of its photoionization rate under excitation of weak to intense laser intensities with varying pulse durations and wavelengths. A novel method is proposed for calculating the photoionization rate: a double exponential decay of ionization probability is best suited for fitting this rate. Confirmation of the well-documented charge-resonance-enhanced ionization (CREI) effect at medium laser intensity and finding of ionization saturation at high light intensity corroborate the robustness of the suggested double-exponential decay process. Surveying the spatial and temporal variations of electronwavefunctions uncovers a mechanism for the double-exponentially decayed photoionization probability as onset of electron ionization along extra degree of freedom. Henceforth, the new method makes clear the origins of peak features in photoionization rate versus internuclear separation. It is believed that this multi-exponentially decayed ionization mechanism is applicable to systems with more degrees of motion.
%K 31
%K 15
%K Qg
%K 33
%K 80
%K Rv
%K 32
%K 80
%K Rm<br>电荷共振增强电离
%K 双指数衰减光致电离作用
%K 数字实验
%K 氢离子
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=BCABE157305DC1D3B2EB62A3CDFBEBBE&yid=67289AFF6305E306&vid=C5154311167311FE&iid=0B39A22176CE99FB&sid=BC88D6B0750E09D1&eid=98494933359B55EC&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0