Geodesic
The probability of multilevel atom ionization by a femtosecond laser pulse
Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, Tome 152 (2010) no. 2, pp. 10-19 Cet article a éte moissonné depuis la source Math-Net.Ru

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The article examines the dependence of the total probability of multilevel atom ionization on the field strength of the Ti:Sapphire-laser femtosecond pulse for different values of its length. The laser field strength varies in a wide range from subatomic to near-atomic values. It is shown that within the subatomic value area the dependence under consideration is in a good agreement with the Keldysh formula. However, when the pulse amplitude increases, both the decrease and the increase of the ionization rate are observed. These effects are due to the dependence of the discrete atomic level population dynamics on the laser pulse amplitude.
Keywords: ionization, Keldysh formula, nonperturbative theory, near-atomic field strength, ionization stabilization, enhanced ionization. 
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     title = {The probability of multilevel atom ionization by a~femtosecond laser pulse},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
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A. V. Andreev; S. Yu. Stremoukhov; O. A. Shoutova. The probability of multilevel atom ionization by a femtosecond laser pulse. Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, Tome 152 (2010) no. 2, pp. 10-19. http://geodesic.mathdoc.fr/item/UZKU_2010_152_2_a2/

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