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Measurement of acoustic phonons in UBe13


The low-energy phonon dispersion of UBe13 has been measured by means of inelastic neutron scattering at room temperature and 10 K and elastic constants have been extracted. They are consistent with values obtained by scaling from pure beryllium, and the angular variation is almost isotropic. The lattice contribution to the low-temperature specific heat has been calculated from these data and is compared with the measured specific heats in the literature. © 1986 The American Physical Society.

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