Zero-Sound Elastic Constants of Solid Krypton atT=114°K

Abstract
The phonon dispersion of a single crystal of krypton has been measured for the [110]L, [110]T1, and [100]T modes at T=114 °K in the region 0.03<q<0.15 Å1 by the inelastic scattering of neutrons. Analysis of the results based on a nearest-neighbor-force-constant fit gives for the zero-sound elastic constants C11=(289±4), C12=(185±4), and C44=(144±1)×108 dyn cm2. This results in an anisotropy A=2C44(C11C12)=2.76±0.05 and a departure from the Cauchy relation of δ=(C44C12)C12=0.22±0.02.