Rotational relaxation of molecular hydrogen
- 1 May 1974
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 60 (9), 3492-3499
- https://doi.org/10.1063/1.1681565
Abstract
The rotational relaxation rate in molecular hydrogen has been determined experimentally between 300 and 1900°K by time of flightanalysis of molecular beams from supersonic free jets. Over their common temperature range from 295 to 1073°K our results are in reasonable agreement with the ultrasonicmeasurements of Winter and Hill which show a rotational collision number Zr between 300 and 400. In terms of momentum transfer collisions Zr is relatively insensitive to temperature. This observation suggests that rotation‐rotation transfers play an important role.Keywords
This publication has 28 references indexed in Scilit:
- Interpretation of Sodium Line-Reversal Measurements in Rapid Expansions of NitrogenThe Journal of Chemical Physics, 1972
- Monte Carlo Trajectory Calculations of the Dissociation of HCl in ArThe Journal of Chemical Physics, 1972
- Vibrational Relaxation of CO in Nonequilibrium Nozzle FlowThe Journal of Chemical Physics, 1968
- Origin of the Temperature Dependence of the Ultrasonic “Rotational Relaxation” TimeThe Journal of Chemical Physics, 1968
- Bidirectional reflectance characteristics of rough, sintered-metal, and wire-screen surface systems.AIAA Journal, 1966
- Steady expansion of a gas into a vacuum.AIAA Journal, 1966
- Vibrational Relaxation of Carbon Monoxide by Ortho- and ParahydrogenThe Journal of Chemical Physics, 1964
- High Intensity Molecular Beam ApparatusReview of Scientific Instruments, 1963
- Geschwindigkeitsanalyse vonLaval-StrahlenThe European Physical Journal A, 1956
- Vibrational Relaxation Times in GasesJournal of Applied Physics, 1950