This paper is a continuation of an earlier paper which treated the decay of resonance radiation in optically excited gases for the case of doppler-broadened radiation in plane-parallel enclosures. The treatment is here extended to a second type of enclosure geometry—infinite cylinders—and to a variety of spectral line shapes.

• Received 12 April 1951

DOI:https://doi.org/10.1103/PhysRev.83.1159