Abstract
The Holstein-Biberman equation describing the evolution of the excited atom population in a dense sodium vapour optically saturated by a short resonant light pulse was solved numerically. Results were compared with the solutions for a weakly excited vapour. It was found that in a strongly excited medium the decay of the Na(3P) atoms is faster than in the case of the weak excitation. A subnatural decay of the resonance fluorescence signal for some experimental geometries was predicted.
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