Theoretical study on non-sequential double ionization of carbondisulfide with different bond lengths in linearly polarizedlaser fields
Theoretical study on non-sequential double ionization of carbondisulfide with different bond lengths in linearly polarizedlaser fields
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线偏振激光场中不同键长二硫化碳非顺序双电离的理论研究
DOI：
10.1088/1674-1056/26/2/023204
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Jing Guo
中科院分区：
文献类型：
--
作者：
Kai-Li Song;Wei-Wei Yu;Shuai Ben;Tong-Tong Xu;Hong-Dan Zhang;Pei-Ying Guo;Jing Guo
利用二维蒙特卡罗经典系综方法，研究了不同键长的CS2分子在800 nm强激光作用下的双电离过程。双电离几率呈现“膝部”结构，平衡核间距R=2.9245 Au(Au是原子单位的缩写)。随着CS键长的增加，DI几率增大，“膝”结构变得不明显。此外，还研究了双电离电子的动量分布，结果表明，随着CS键长的增加，电子动量主要分布在平衡核间距R=2.9245 Au的第一和第三象限，电子动量在四象限内趋于均匀分布。此外，还给出了双电离电子的能量分布和相应的随时间变化的轨迹，表明CS2分子中CS的键长在DI过程中起着关键作用。
By using a two-dimensional Monte-Carlo classical ensemble method, we investigate the double ionization (DI) process of the CS 2 molecule with different bond lengths in an 800-nm intense laser field. The double ionization probability presents a" knee" structure with equilibrium internuclear distance R= 2.9245 au (au is short for atomic unit). As the bond length of CS increases, the DI probability is enhanced and the" knee" structure becomes less obvious. In addition, the momentum distribution of double ionized electrons is also investigated, which shows the momentum mostly distributed in the first and third quadrants with equilibrium internuclear distance R= 2.9245 au As the bond length of CS increases, the electron momentum becomes evenly distributed in the four quadrants. Furthermore, the energy distributions and the corresponding trajectories of the double-ionized electrons versus time are also demonstrated, which show that the bond length of CS in the CS 2 molecule plays a key role in the DI process.