Evidence of potential change in nonsequential double ionization*
Evidence of potential change in nonsequential double ionization*
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DOI：
10.1088/1674-1056/abc151
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发表时间：
2021-01
影响因子：
1.7
通讯作者：
Changchun Jia;Pu Zhang;Hua Wen;Zhangjin Chen
中科院分区：
文献类型：
--
作者：
Changchun Jia;Pu Zhang;Hua Wen;Zhangjin Chen
近年来，非顺序双电离（NSDI）的定量再散射模型（QRS）被修正，考虑了电离时由于电场的存在而引起的电势变化（PC）。利用改进的QRS模型，通过将He的NSDI的相关双电子动量分布投影到主对角线上，模拟了双电荷离子He 2+的纵向动量分布.所得结果与不同强度下的实验数据直接进行了比较。计算结果表明，当考虑光子晶体时，动量分布的宽度减小，理论与实验的一致性得到改善。
Recently, the quantitative rescattering model (QRS) for nonsequential double ionization (NSDI) is modified by taking into account the potential change (PC) due to the presence of electric field at the time of recollision. Using the improved QRS model, we simulate the longitudinal momentum distributions of doubly charged ions He 2+ by projecting the correlated two-electron momentum distributions for NSDI of He onto the main diagonal. The obtained results are compared directly with the experimental data at different intensities. It is found that when the PC is considered, the width of momentum distributions reduces and the agreement between theory and experiment is improved.