Ionization of a two-electron atom in a strong electromagnetic field |
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| Authors: | O V Ovodova A M Popov O V Tikhonova |
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| Institution: | (1) D. V. Skobeltsyn Research Institute for Nuclear Physics, M. V. Lomonosov Moscow State University, 119899 Moscow, Russia |
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| Abstract: | A one-dimensional model of a helium atom in an intense field of a femtosecond electromagnetic pulse has been constructed using
the Hartree technique. “Exact” calculations have been compared to the approximations of “frozen” and “passive” electrons.
A nonmonotonic dependence of the single-electron ionization probability on the radiation intensity has been detected. Minima
in the ionization probability are due to multiphoton resonances between different atomic states due to the dynamic Stark effect.
We suggest that the ionization suppression is due to the interference stabilization in this case.
Zh. éksp. Teor. Fiz. 112, 470–482 (August 1997) |
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