Phonon Dispersion of Mo-stabilized -γ-U measured using Inelastic X-ray Scattering

Published

September 30, 2019

Author(s)

Z. E. Brubaker, Sheng NMN Ran, A. H. Said, M. E. Manley, P. Soderlind, D. Rosas, Y. Idell, R. J. Zieve, Nicholas Butch, J. R. Jeffries

Abstract

We have measured the room-temperature phonon spectrum of Mo-stabilized γ−U. The dispersion curves show unusual softening near the H point, q=[1/2,1/2,1/2], which may derive from the metastability of the γ−U phase or from strong electron-phonon coupling. Near the zone center, the dispersion curves agree well with theory, though significant differences are observed away from the zone center. The experimental phonon density of states is shifted to higher energy compared to theory and high-temperature neutron scattering. The elastic constants of γ-UMo are similar to those of body-centered cubic elemental metals.

Citation

Physical Review B

Volume

100

Issue

9

Pub Type

Journals

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Keywords

phonon

Citation

Brubaker, Z. , Ran, S. , Said, A. , Manley, M. , Soderlind, P. , Rosas, D. , Idell, Y. , Zieve, R. , Butch, N. and Jeffries, J. (2019), Phonon Dispersion of Mo-stabilized -γ-U measured using Inelastic X-ray Scattering, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=928830 (Accessed April 26, 2024)