Effective X-Ray and Calorimetric Debye Temperature for Copper

Abstract

The Debye-Waller factor for copper was determined from x-ray intensity measurements on a single crystal over the temperature range 4.2\ifmmode^\circ\else\textdegree\fi{}K-500\ifmmode^\circ\else\textdegree\fi{}K. From a machine calculation of the vibrational spectrum of copper the values of the specific heat and Debye-Waller factor were obtained and compared with those found by experiment. The agreement indicates that for copper the central force model with nearest- and second-neighbor interactions is adequate for the interpretation of effects depending on simple averages over the frequency spectrum.