Abstract
The recently discovered amplified emission of alkali atoms resonantly excited to theP 3/2 state by intense laser beam is analyzed theoretically. This effect is caused essentially by collisions with buffer gas atoms building up a population inversion of theP 1/2 state with respect to theS 1/2 ground state. Our theoretical calculations based on dressed-atom density matrix analysis agree with most experimental results.
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Supported by the Polish Ministry of Science and Technology under Project MR.I.7.