Low-temperature heat capacity of solid HD
J.H. ConstableDepartment of Physics, Ohio State University, Columbus, Ohio 43210Albert Quince McGeeDepartment of Physics, Ohio State University, Columbus, Ohio 43210J. R. GainesDepartment of Physics, Ohio State University, Columbus, Ohio 43210
1975en
ABI
Abstract
The heat capacity at the saturated vapor pressure ${C}_{ s}$ has been measured for a single sample of solid HD over the temperature range 0.4 to 8 K for various concentrations of $J=1$ impurities of ${\mathrm{H}}_{2}$ and ${\mathrm{D}}_{2}$. The variation in $J=1$ concentration in the sample was due to conversion to the $J=0$ rotational ground state over a period of time of approximately one month. In the limit of zero $J=1$ concentration, ${C}_{ s}$ fitted a ${T}^{3}$ dependence characterized by a Debye temperature of 101 K. An analysis is given of the contribution to the heat capacity from electric quadrupole-quadrupole pair interactions of the $J=1$ impurities in the solid.
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