Vibrational deactivation rates of HF(ν = 1) by CH4, C2H6, C3H8, C4H10, C3H6, and ClF3

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Abstract
The rates at which vibrationally excited HF is deactivated by CH4, C2H6, C3H8, C4H10, C3H6, and ClF3 have been measured to be (5.3 ± 0.8) × 104; (1.10 ± 0.16) × 105; (1.35 ± 0.2) × 105; (1.7 ± 0.25) × 105; (3.2 ± 0.5) × 105 and (1.13 ± 0.17) × 105 sec−1 · torr−1, respectively, using the laser‐excited vibrational fluorescence technique. It was found that the cross‐section for HF deactivation by the lower alkanes, Cn H2n+2, varied linearly with n. The deactivation rate measured for HF–ClF3 is orders of magnitude greater than has been observed for HF deactivation by other fluorine sources. The importance of the above rate measurements in the understanding and analysis of pulsed HF lasers is discussed in detail.