Electron detachment from negative ions in bichromatic laser field

Details Electron detachment from negative ions in bichromatic laser field Electron detachment from negative ions in bichromatic laser field

1997-12-17

arxiv.org/abs/physics/9712030v1

J. Phys. B: At. Mol. Opt. Phys, 31 (1998) 1

Physics

Atomic Physics

13 pages, 8 figures in separate files which are not incorporated in the latex file of the paper

Scientific paper

10.1088/0953-4075/31/11/014

Negative ion detachment in two-colour laser field is considered within the recent modification of Keldysh model which makes it quantitatively reliable. The general approach is illustrated by calculation of angular differential detachment rates, partial rates for particular ATD (Above Threshold Detachment) channels and total detachment rates for H$^-$ ion in bichromatic field with 1:2 frequency ratio. Both perturbative and strong field regimes are examined. Polar asymmetry and phase effects are quantitatively characterized with some new features revealed. Phase effects are found to result in a huge anisotropy factor $\sim 10^3$ in the electron angular distribution in the perturbative regime.

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