Angular distribution and polarization of photons during resonant above-threshold scattering on an atom |
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| Authors: | E. V. Gryzlova A. I. Magunov S. I. Strakhova |
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| Affiliation: | 1. Skobeltsyn Institute of Nuclear Physics, Lomonosov State University, Leninskie gory, Moscow, 119992, Russia
2. Prokhorov General Physics Institue, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russia
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| Abstract: | The effect of the resonant structure in the continuous spectrum induced by an external laser field due to the coupling of continuum states with the 1s4s 1 S level in helium on cross sections of elastic and inelastic scattering of probe radiation on an atom in the metastable 1s2s 1 S state at an energy above the ionization threshold is theoretically studied. Explicit expressions for the angular distribution and the degree of polarization of scattered photons as functions of probe and laser radiation characteristics are derived in the rotating wave approximation. Frequency, angular, and polarization dependences of the cross sections of scattering into final 1s 2 1 S, 1 s2s 1 S, and 1s4s 1 S atomic states are calculated. |
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