Issue 0, 1976

Vibrational relaxation in OCS mixtures. Part 1.—Measured relaxation times for pure OCS and for OCS in mixtures with helium-4, helium-3, normal deuterium, ortho-deuterium, HD, normal hydrogen and para-hydrogen

Abstract

This paper reports experimental measurements of vibrational relaxation times which may be used to show whether there is near resonant vibration-rotation energy transfer between OCS and H2, D2 or HD. Vibrational relaxation times have been measured in OCS and OCS mixtures over the temperature range 360 to 1000 K using a shock tube and a laser schlieren system. The effectiveness of the additives in reducing the relaxation time of OCS is in the order 4HE < 3HE < D2 < H2 and HD. Along this series the effect of an increase in temperature changes from the case of speeding up the rate with 4He to retarding it with D2, HD and H2. There is no measurable difference in the effectiveness of n-D2 and o-D2 and little, or no, difference between n-H2 and p-H2. Thus the experimental results do not give clear evidence for rotation-vibration energy transfer between hydrogen and OCS. This contrasts with the situation for CO2+ H2 mixtures.

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans. 2, 1976,72, 417-422

Vibrational relaxation in OCS mixtures. Part 1.—Measured relaxation times for pure OCS and for OCS in mixtures with helium-4, helium-3, normal deuterium, ortho-deuterium, HD, normal hydrogen and para-hydrogen

C. J. S. M. Simpson, P. D. Gait and J. M. Simmie, J. Chem. Soc., Faraday Trans. 2, 1976, 72, 417 DOI: 10.1039/F29767200417

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements