Abstract
AbstractThe phonon spectra of solidified Argon and Krypton have been calculated on the basis of the Born‐Karman theory using the interatomic potential ϕ(r) = ‐Ar−6 + AB × exp (‐r/Q), and taking into account the zero‐point energy and interactions of the four nearest neighbours. The evaluation of the parameters A, B, and Q requires a knowledge of the vibration spectrum of the crystal which is itself a function of these constants. A method of iteration is therefore employed to evaluate the potential parameters, after estimating the frequency‐dependent terms using the Debye theory of specific heats. The static lattice energy is obtained by a method of successive approximations. The specific heats and (θ,T) curves show a fair agreement with the experimental results.
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