Binary and recoil collisions in strong field double ionization of helium |
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Authors: | Staudte A Ruiz C Schöffler M Schössler S Zeidler D Weber Th Meckel M Villeneuve D M Corkum P B Becker A Dörner R |
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Institution: | National Research Council, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada. andre.staudte@nrc.ca |
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Abstract: | We have investigated the correlated momentum distribution of both electrons from nonsequential double ionization of helium in a 800 nm, 4.5 x 10(14 W/cm2 laser field. Using very high resolution coincidence techniques, we find a so-far unobserved fingerlike structure in the correlated electron momentum distribution. The structure can be interpreted as a signature of the microscopic dynamics in the recollision process. We identify features corresponding to the binary and recoil lobe in field-free (e,2e) collisions. This interpretation is supported by analyzing ab initio solutions of a fully correlated three-dimensional helium model. |
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