title: Mechanisms of strong-field double ionization of Xe.
abstract: We perform a fully differential measurement on strong-field double ionization of Xe by 25 fs, 790 nm laser pulses in intensity region (0.4-3)×10(14) W/cm2. We observe that the two-dimensional correlation momentum spectra along the laser polarization direction show a nonstructured distribution for double ionization of Xe when decreasing the laser intensity from 3×10(14) to 4×10(13)  W/cm2. The electron correlation behavior is remarkably different with the low-Z rare gases, i.e., He, Ne, and Ar. We find that the electron energy cutoffs increase from 2.9Up to 7.8Up when decreasing the laser intensities from the sequential double ionization to the nonsequential double ionization regime. The experimental observation indicates that multiple rescatterings play an important role for the generation of high energy photoelectrons. We have further studied the shielding effect on the strong-field double ionization of high-Z atoms.
authors.affiliation: Department of Physics and State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China.
authors.forename: Xufei
authors.initials: X
authors.lastname: Sun
authors.affiliation: Department of Physics and State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China and Collaborative Innovation Center of Quantum Matter, Beijing 100871, China.
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.affiliation: Institute of Applied Physics and Computational Mathematics, 100088 Beijing, China.
authors.forename: Difa
authors.initials: D
authors.lastname: Ye
authors.affiliation: Department of Physics, Northwest University, 710069 Xi'an, China.
authors.forename: Guoguo
authors.initials: G
authors.lastname: Xin
authors.affiliation: Institute of Applied Physics and Computational Mathematics, 100088 Beijing, China and HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100084, China.
authors.forename: Libin
authors.initials: L
authors.lastname: Fu
authors.affiliation: Department of Physics and State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China.
authors.forename: Xiguo
authors.initials: X
authors.lastname: Xie
authors.affiliation: Department of Physics and State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China.
authors.forename: Yongkai
authors.initials: Y
authors.lastname: Deng
authors.affiliation: Department of Physics and State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China and Collaborative Innovation Center of Quantum Matter, Beijing 100871, China.
authors.forename: Chengyin
authors.initials: C
authors.lastname: Wu
authors.affiliation: Institute of Applied Physics and Computational Mathematics, 100088 Beijing, China and HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100084, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.affiliation: Department of Physics and State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China and Collaborative Innovation Center of Quantum Matter, Beijing 100871, China.
authors.forename: Qihuang
authors.initials: Q
authors.lastname: Gong
authors.affiliation: Department of Physics and State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China and Collaborative Innovation Center of Quantum Matter, Beijing 100871, China.
authors.forename: Yunquan
authors.initials: Y
authors.lastname: Liu