Orientational quadrupolar glass in ortho-para hydrogen mixtures. II. Comparison with experiment

1996 ◽  
Vol 104 (1-2) ◽  
pp. 25-48 ◽  
Author(s):  
V. B. Kokshenev
Keyword(s):  
Para Hydrogen ◽  
Comparison With Experiment ◽  
Hydrogen Mixtures ◽  
Quadrupolar Glass

Viscosity of ortho and para hydrogen mixtures

1973 ◽  
Vol 25 (2) ◽  
pp. 249-263 ◽  
Author(s):  
L. Monchick ◽  
N.J. Brown ◽  
R.J. Munn
Keyword(s):  
Para Hydrogen ◽  
Hydrogen Mixtures

Local ordering in dilute ortho-para-hydrogen mixtures at low temperatures

1988 ◽  
Vol 72 (1-2) ◽  
pp. 1-24 ◽  
Author(s):  
C. M. Edwards ◽  
D. Zhou ◽  
Y. Lin ◽  
N. S. Sullivan
Keyword(s):  
Low Temperatures ◽  
Para Hydrogen ◽  
Local Ordering ◽  
Hydrogen Mixtures

A study of vibrational-rotational energy exchange in a shock tube

1971 ◽  
Vol 325 (1561) ◽  
pp. 197-206 ◽  
Keyword(s):  
Energy Transfer ◽  
Energy Exchange ◽  
Room Temperature ◽  
Vibrational Energy ◽  
Theoretical Calculations ◽  
Relaxation Times ◽  
Vibrational Energy Transfer ◽  
Para Hydrogen ◽  
Schlieren Method ◽  
Hydrogen Mixtures

Vibrational relaxation times have been measured in CO 2 + H 2 mixtures from 344 to 742 K by a laser-schlieren method. Normal and para hydrogen mixtures have been used. The scatter in the results is small and there is excellent agreement with a recent ultrasonic measurement at room temperature. The results are not in accord with the theoretical calculations of Sharma. They show that both rotational-vibrational and translational-vibrational energy transfer must be important for this case and throw light on the importance of rotational-vibrational energy transfer in other systems.

Orientational ordering in solid hydrogen

1987 ◽  
Vol 65 (11) ◽  
pp. 1463-1470 ◽  
Author(s):  
N. S. Sullivan ◽  
C. M. Edwards ◽  
Y. Lin ◽  
D. Zhou
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Solid Hydrogen ◽  
Order Parameters ◽  
Para Hydrogen ◽  
Hydrogen Mixtures ◽  
Orientational Ordering ◽  
Nuclear Magnetic

The orientational ordering in solid ortho–para hydrogen mixtures is reviewed with emphasis on dilute mixtures for which a glass-like freezing of the randomly distributed quantum rotators is observed. The interpretation of the various nuclear magnetic resonance experiments used to monitor the relevant order parameters is discussed, and a summary is given of the current consensus and outstanding problems concerning the nature of the ordering in random dilute mixtures.

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