Date of this Version
Physical Review A
Terms up to order (Γ/kBT)5 in the high-temperature expansion of the orientational specific heat of ortho-para alloys of solid H2 or D2 are evaluated. Good agreement is obtained between theory and experiment using a Padé approximant and effective values of the quadrupolar coupling constant, Γeff/Γ0=0.83 for D2 and Γeff/Γ0=0.80 for H2, where Γ0 is the value for a rigid lattice. These values agree with other determinations of Γeff, whereas the T−2 approximation for the specific heat yields anomalously small values of Γeff.
Berlinsky, A., & Harris, A. (1970). High-Temperature Expansion for the Orientational Specific Heat of Solid H2 and D2. Physical Review A, 1 (3), 878-887. http://dx.doi.org/10.1103/PhysRevA.1.878
Date Posted: 12 August 2015
This document has been peer reviewed.