Heat Capacity of Calcium from 1.8 to 4.2°K

Abstract

The heat capacity of high‐purity calcium has been measured over the temperature interval from 1.8 to 4.2°K. The electronic contribution is linear in T and the coefficient γ is 3.08±0.01 millijoules/(gram‐atom) deg² corresponding to a density of states at the Fermi level of 0.653 momentum state per electron volt per atom. A Debye temperature of 239±2°K was obtained. For purposes of testing the calorimeter, the heat capacity of copper was determined. In agreement with other recent measurements, the value obtained for γ is 0.691±0.006 millijoule/(gram‐atom) deg² and θ_D is 342±2°K.