Phys. Rev. B 66, 064303 (2002) [5 pages]Phonon dispersions in niobium determined by x-ray transmission scatteringReceived 10 April 2002; published 16 August 2002 Quasielastic x-ray scattering from thermally populated phonons in crystalline niobium was recorded using a charge-coupled device over a large angular range. The patterns, displayed on a logarithmic intensity scale, reveal rich features. Theoretical patterns based on a lattice dynamics calculation are generated, and a least-squares simultaneous fit of these patterns recorded at several incidence angles yields phonon dispersion relations over the entire reciprocal space. The dispersions along high-symmetry directions are generally in good accordance with available neutron scattering data. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.66.064303
DOI:
10.1103/PhysRevB.66.064303
PACS:
78.70.Ck, 63.20.Dj
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