Accession Number : AD0425686

Title :   A STUDY OF THE CRYSTAL DYNAMICS OF ZINC,

Corporate Author : ARMY MATERIALS RESEARCH AGENCY WATERTOWN MASS

Personal Author(s) : Antal,J. J. ; Borgonovi,G. ; Caglioti,G.

Report Date : SEP 1963

Pagination or Media Count : 16

Abstract : A number of the normal modes of vibration of the anisotropic hexagonal metallic system of zinc were studied through a determination of the dispersion relations by neutron inelastic scattering. Measurements carrying relatively small experimental errors were made for directions in a single crystal which produce information about the motions of atoms within the basal planes, the motion of the basal planes actin as single units, and the motions of atoms perpendicular to the basal planes which tend to warp these planes. Attemps are made to fit the experimental data to formulations of BornVon Karman dynamical theory involving generalized forces between pairs of atoms. Consideration of forces extending to fourth-nearest neighbors is necessary to obtain agreement with our dispersion relations. The experimental data generally supply details of the anisotropic mechanisms operating in zinc and indicate that anomalies might exist in the dispersion relations describing atomic motions perpendicular to the basal planes. (Author)

Descriptors :   (*ZINC, CRYSTALLIZATION), VIBRATION, ANISOTROPY, METAL CRYSTALS, NEUTRON SCATTERING, INELASTIC SCATTERING, MEASUREMENT, EXPERIMENTAL DATA, ERRORS, SINGLE CRYSTALS, MOTION, ATOMS, DYNAMICS, THEORY

Distribution Statement : APPROVED FOR PUBLIC RELEASE