Two-photon double ionization of helium by attosecond laser pulses: Evidence of highly correlated electron motion
Type
Peer reviewed; Journal articlePeer reviewed
publishedVersion
Date
2012
Metadata
Show full item recordAbstract
We apply a recently developed ab initio numerical framework to investigate the angular distributions of the
emitted electrons in the immediate proximity of the threshold for the two-photon double ionization of helium.
Provided one of the electrons is emitted perpendicular to the laser polarization direction, it is found that the
angular distribution of the other electron is characterized by three lobes. The results are similar to those recently
reported for the corresponding process in the hydrogen negative ion [R. Nepstad and M. Førre, Phys. Rev. A 84,
021402(R) (2011)], and provide further evidence of highly correlated electron dynamics in the vicinity of the
double ionization threshold.
Citation
Physical Review A 85: 035404Publisher
American Physical SocietyCollections
Copyright 2011 American Physical Society