Abstract
Saturated absorption of CO2-laser radiation in HCOOH gas was measured as a function of pressure. A simple rate equation model is used to calculate the saturation photon densities. It is concluded from these data that vibrational relaxation is collision predominant, and that decreased absorption, observed at high pressure and high radiation intensities, cannot be interpreted as diffusion bounded vibrational relaxation.
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Weiss, C.O., Kramer, G. Vibrational relaxation in the HCOOH-far-infrared laser. Appl. Phys. 9, 175–177 (1976). https://doi.org/10.1007/BF00903956
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DOI: https://doi.org/10.1007/BF00903956