Abstract
Phonon-dispersion curves were obtained from inelastic x-ray scattering measurements on high-purity uranium single crystals at room temperature. Modes displacing atoms along [00ζ] and propagating in all three high-symmetry directions were measured. Whereas the acoustic modes agree with the neutron measurements, the longitudinal-optic branch is about 10% higher in energy, but consistent with higher cutoff energies observed in phonon density-of-states measurements on polycrystals. The application of this x-ray technique, which requires only very small samples, opens possibilities in actinide science.
Original language | English |
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Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 67 |
Issue number | 5 |
DOIs | |
State | Published - Feb 27 2003 |
Externally published | Yes |