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Report No.

Ionization dynamics of a xenon atom in super-strong laser fields

Yamakawa, Koichi; Akahane, Yutaka; Fukuda, Yuji; Aoyama, Makoto; Inoue, Norihiro*; Ueda, Hideki; Utsumi, Takayuki*

We report on detailed investigations of ionization dynamics of a xenon atom exposed to intense 800-nm pulses of 20-fs duration in the extensiveintensity range from 10$$^{13}$$ to 10$$^{18}$$W/cm$$^{2}$$.Ion yields of Xe$$^{+}$$ to Xe$$^{20+}$$ were observed as a function of laser intensity and compared with the results from a single active electron(SAE) based Ammosov-Delone-Krainov(ADK) model.Unexpected ionization probabilities for lower charge states and also no interplay between the inner-and outer-shells by screening are inferred.Suppression of nonsequential ionization towards higher intensity and few optical cycle regimesis also proved.



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