The relaxation of HCl(ν = 1) and DCl(ν = 1) by O atoms between 196 and 400 K |
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Authors: | Raymond DH Brown Graham P Glass Ian WM Smith |
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Institution: | Department of Physical Chemistry, University Chemical Laboratories, Cambridge CB2 1EP, UK |
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Abstract: | The rates of relaxation of HCl(ν = 1) and DCl(ν = 1) by atomic oxygen have been determined between 196 and 400 K using the laser induced vibrational fluorescence method. The values of the rate constants, κ1,H and κ1,D, can be matched quite well by Arrhenius expressions: κ1,H = 6.2 × 10?12 exp (?1.05 kcal mole?1/RT) cm3 molecule?1 s?1 and κ1,D = 2.9 × 10?12 exp (?0.5 kcal mole?1/RT) cm3 molecule?1 s?1. The most likely explanation of the absolute and relative magnitudes of these rate constants appears to be that relaxation occurs as a result of non-adiabatic vibronic transitions during collisions. |
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