Phonon-Dispersion Measurements on a Krypton Single Crystal

Phonon-dispersion relations for the symmetric [100], [110], and [111] branches in fcc krypton have been measured by triple-axis neutron spectrometry. Measurements were carried out at 79\ifmmode^\circ\else\textdegree\fi{}K on a single-crystal sample grown from the melt at a pressure of 2.31 kbar.