Two-electron photodetachment of negative ions in a strong laser field.
We study the photodetachment of H-, F-, and Br- in a short laser pulse of 800 nm wavelength and 6 x 10(14) W/cm2 peak intensity. Photoelectron spectra, recorded with the use of an imaging technique, reveal a substantial contribution from the sequential process of double detachment of halogen negative ions. The saturation effect is shown to play a crucial role in this process. The role of the alignment of atoms produced by photodetachment is discussed.
Physikalisches Institut, Albert-Ludwigs-Universität, D-79104 Freiburg, Germany.
Boris
B
Bergues
Igor Yu
IY
Kiyan