%A Changchun Jia(贾昌春), Pu Zhang(张朴), Hua Wen(文华), and Zhangjin Chen(陈长进) %T Evidence of potential change in nonsequential double ionization %0 Journal Article %D 2021 %J Chin. Phys. B %R 10.1088/1674-1056/abc151 %P 23401-0 %V 30 %N 2 %U {https://cpb.iphy.ac.cn/CN/abstract/article_123215.shtml} %8 2021-01-18 %X 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 He2+ 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.