Dispersion Relations for Phonons in Lead at 80 and 300°K

Abstract
Using a three-axis neutron spectrometer, phonon frequencies have been determined for lead for wave vectors in the principal symmetry directions and at many other points in reciprocal space. The results are presented as dispersion curves and as contour maps of frequency on the surface of an element of reciprocal space. The measurements were mainly at 80°K, but also at 300°K in some selected cases. Data on frequency shifts from 80 to 300°K are given, as well as on frequency widths at 300°K.

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