Multiphoton Ionization

Erna Karule
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Erna Karule: Institute of Physics, Latvian Academy of Sciences, 229021 Riga, Salaspils-1, Latvia.

International Journal of Modern Physics C (IJMPC), 1991, vol. 02, issue 01, 387-390

Abstract: Multiphoton ionization happens in an intense light beam when atoms absorb more than one photon. In strong fields an atom may absorb not only the minimum energetically necessary number of photons for ionization, but also excess photons. The last process is the so called “above threshold ionization” (ATI) which as well as “normal” multiphoton ionization (MPI) takes place in the strong laser fields. Both processes are between those responsible for the energy transfer from the laser to the plasma.The paper deals with the quantum mechanical calculation of MPI and ATI of atomic hydrogen. At the moderate intensities of light these processes may be treated by methods of perturbation theory.

Date: 1991
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DOI: 10.1142/S0129183191000548

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