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Electron energy spectra from intense laser double ionization of helium
R Lafon1, J L Chaloupka, B Sheehy
1Chemistry Department, Brookhaven National Laboratory, Upton, NY 11973, USA.
Physical Review Letters
|April 6, 2001
Abstract:
The double ionization of helium in the strong-field limit has been studied using an electron-ion coincidence technique. The observed double ionization electron energy spectra differ significantly from the single ionization distributions. This gives new support to the rescattering model of double ionization and explicitly reveals the role of backward electron emission following the e-2e ionizing collision.