Binary and recoil collisions in strong field double ionization of helium

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 moment...

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Bibliographic Details
Published in:Physical review letters 2007-12, Vol.99 (26), p.263002-263002, Article 263002
Main 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
Format: Article
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
ELECTRON COLLISIONS
ELECTRON CORRELATION
ELECTRONS
HELIUM
IONIZATION
LASER RADIATION
MATHEMATICAL SOLUTIONS
THREE-DIMENSIONAL CALCULATIONS
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.99.263002