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Rotational relaxation rate constants for CO 2



Rotational relaxation rate constants, k rot , have been measured for the CO 2 00°1 level in three kinds of amplifiers: one using CO 2 alone and two others using mixtures of CO 2 ☒He and CO 2 ☒N 2 . The experiment consists of perturbing the CO 2 00°1 level with a ∼2‐nsec saturating pulse at P (20) in the 10.4‐μ band and monitoring the subsequent repopulation of the J = 19 rotational state with a probe beam set at P (20) in the 9.4‐μ band. The determined rate constants are k CO 2 ☒CO 2 = 1.3±0.2, k CO 2 ☒He = 0.6±0.1, and k CO 2 ☒N 2 = 1.2±0.2, all in units of 10 7 sec −1 Torr −1 .



Applied Physics LettersAmerican Institute of Physics

Published: Apr 15, 1974

DOI: 10.1063/1.1655223

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