LINE RADIATION IN NON LOCAL THERMODYNAMIC EQUILIBRIUM.
POLITECNICO DI TORINO (ITALY) ISTITUTO DI MECCANICA APPLICATA AERODINAMICA E GASDINAMICA
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In the paper, the problem of the line radiation in condition of non thermodynamic equilibrium has been treated and the results obtained have been applied to the study of the imprisonment of resonance radiation. It was found that the excited level, and by consequence the resonance radiation, decays in two ways in competition each other one is a diffusive decay, due to the fact that the gas is generally very thick for frequencies near the center of the absorption line, and the other is an exponential decay due to the far wings of the absorption coefficient where the gas is optically thin. Author
- Atomic and Molecular Physics and Spectroscopy