Abstract
Using three-dimensional classical ensembles, we have investigated the internuclear distance dependence of nonsequential double ionization (NSDI) of H(2) molecules by an 800 nm, 1x10(14) W/cm(2) laser pulse. For the internuclear distance R ranging from 2 to 12 a.u., the NSDI of H(2) provides rich correlation patterns in the two-electron momentum distributions. These correlation patterns essentially reveal different microscopic dynamics in NSDI process. Moreover, our calculations show that R approximately 4 a.u. is the critical distance for double ionization yield of H(2). These results are qualitatively explained based on the classical barrier expression model and back analysis.
Highlights
With the three-dimensional (3D) classical ensemble model, we investigate the R-dependence of electron correlation in nonsequential double ionization (NSDI) of H2 driven in a linearly polarized laser field
For a fixed R, the sequential double ionization (SDI) probability is determined by the singly ionized (SI) probability, the ionization potential of the second electron (Ip2) and the double potential well distorted by the external laser field
Based on the same statistical criterion as that for NSDI, the rescattering probability of the first ionized electron as a function of R is plotted in Fig. 4 (b), which decreases with R increasing
Summary
D. Lin, “Rescattering double ionization of D2 and H2 by intense laser pulses,” Phys. “H2 double ionization with few-cycle laser pulses,” Phys. D. Bandrauk, “Molecules in intense laser fields: enhanced ionization in a one-dimensional model of H2,” Phys.
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