Double ionization of excited helium states by an intense laser field: spin and dressing effects

TitleDouble ionization of excited helium states by an intense laser field: spin and dressing effects
Publication TypeJournal Article
Year of Publication2003
Veniard, V, Taieb, R, Maquet, A
JournalJOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Volume36
Issue20
Pagination4145-4154
Date PublishedOCT 28
ISSN0953-4075
Keywordspaper
Abstract

We present numerical simulations for a model one-dimensional two-electron atom subjected to an intense laser pulse. Double ionization probabilities are presented when the atom is initially in an excited state and depend strongly on the spin state of the system. In view of the recollision picture, we show that they are strongly correlated with the electron-impact ionization probabilities. Furthermore, we show that the dressing by the laser of the remaining ion has to be taken into account to quantitatively describe the two-electron ejection in the low intensity range.

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