Lattice vibrations in tungsten at 22 °C studied by neutron scattering

Abstract

The phonon spectrum of tungsten at 22 °C has been reexamined along major symmetry directions using triple-axis neutron spectrometry. The purposes of the experiment were to search for a predicted Kohn effect near the H-point and to extend the previously published measurements. The results are in agreement with those already published, but the expected Kohn effect could not be unambiguously observed with the instrumental resolution available.