Electron Drift Directions in Strong-Field Double Ionization of Atoms
arXiv:0901.2554 · doi:10.1088/0953-4075/42/13/134009
Abstract
Longitudinal momentum spectra and electron drift directions are considered for several laser wavelengths in Non-Sequential Double Ionization of helium using three dimensional classical ensembles. In this model, the familiar doublet for wavelength 800 nm and intensities of order 0.5 PW/cm^2, becomes a triplet for wavelength 1314 nm, then a doublet with plateau for 2017 nm. The results are explained based on whether the post-ionization impulse from the laser results in backward drift for one or both electrons.
arXiv comment12 pages, 9 figures; submitted to J.Phys.B on 30 December 2008
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