Abstract
The spontaneous ortho-para conversion rate in solid hydrogen under pressure has been observed to increase by approximately an order of magnitude at temperatures greater than 0.08 theta/sub 0/ and for molar volumes less than 19.7 cm/sup 3/. This effect, which disappears upon cooling below these temperatures, cannot be understood in terms of present theoretical models. The heat capacity experiment (C/sub V/(V,T)) in which these effects were observed gives an equation of state for parahydrogen for pressures less than 2 kbar which agrees with previous high pressure work at 4.2/sup 0/K, and a T=O equilibrium molar volume of 23.20 +- 0.05 cm/sup 3/. 2 figures.
Citation Formats
Krause, J K, and Swenson, C A.
Thermally-induced ortho-para conversion anomaly in solid hydrogen under pressure.
United Kingdom: N. p.,
1979.
Web.
doi:10.1016/0038-1098(79)90398-3.
Krause, J K, & Swenson, C A.
Thermally-induced ortho-para conversion anomaly in solid hydrogen under pressure.
United Kingdom.
https://doi.org/10.1016/0038-1098(79)90398-3
Krause, J K, and Swenson, C A.
1979.
"Thermally-induced ortho-para conversion anomaly in solid hydrogen under pressure."
United Kingdom.
https://doi.org/10.1016/0038-1098(79)90398-3.
@misc{etde_6775923,
title = {Thermally-induced ortho-para conversion anomaly in solid hydrogen under pressure}
author = {Krause, J K, and Swenson, C A}
abstractNote = {The spontaneous ortho-para conversion rate in solid hydrogen under pressure has been observed to increase by approximately an order of magnitude at temperatures greater than 0.08 theta/sub 0/ and for molar volumes less than 19.7 cm/sup 3/. This effect, which disappears upon cooling below these temperatures, cannot be understood in terms of present theoretical models. The heat capacity experiment (C/sub V/(V,T)) in which these effects were observed gives an equation of state for parahydrogen for pressures less than 2 kbar which agrees with previous high pressure work at 4.2/sup 0/K, and a T=O equilibrium molar volume of 23.20 +- 0.05 cm/sup 3/. 2 figures.}
doi = {10.1016/0038-1098(79)90398-3}
journal = []
volume = {31}
journal type = {AC}
place = {United Kingdom}
year = {1979}
month = {Jan}
}
title = {Thermally-induced ortho-para conversion anomaly in solid hydrogen under pressure}
author = {Krause, J K, and Swenson, C A}
abstractNote = {The spontaneous ortho-para conversion rate in solid hydrogen under pressure has been observed to increase by approximately an order of magnitude at temperatures greater than 0.08 theta/sub 0/ and for molar volumes less than 19.7 cm/sup 3/. This effect, which disappears upon cooling below these temperatures, cannot be understood in terms of present theoretical models. The heat capacity experiment (C/sub V/(V,T)) in which these effects were observed gives an equation of state for parahydrogen for pressures less than 2 kbar which agrees with previous high pressure work at 4.2/sup 0/K, and a T=O equilibrium molar volume of 23.20 +- 0.05 cm/sup 3/. 2 figures.}
doi = {10.1016/0038-1098(79)90398-3}
journal = []
volume = {31}
journal type = {AC}
place = {United Kingdom}
year = {1979}
month = {Jan}
}