Temperature dependence and anharmonicity of the Debye-Waller factor in sodium metal using Moessbauer. gamma. -ray diffraction

Journal Article · Sun Jan 15 04:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.909· OSTI ID:6552728

Crow, M L; Schupp, G; Yelon, W B; Mullen, J G; Djedid, A

The Debye-Waller factor of sodium has been measured as a function of temperature from 80 to 295 K using Moessbauer ..gamma..-ray scattering. The high energy resolution provided by this technique allowed experimental separation of the elastic scattering from the inelastic thermal diffuse scattering. The results were compared with the harmonic model using integrations over dispersion curves from the neutron-scattering measurements of Woods et al. and the lattice-dynamics calculations of Glyde and Taylor. The Debye-Waller exponent was shown to exceed the harmonic prediction by 23% at room temperature. This difference is attributed to anharmonic terms in the interatomic potential.

• Research Organization: Research Reactor and Department of Physics and Astronomy, University of Missouri, Columbia, Missouri 65211
• OSTI ID: 6552728
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:2; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALKALI METALS
DATA
DATA ANALYSIS
DEBYE-WALLER FACTOR
DISPERSION RELATIONS
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
GAMMA SPECTRA
INFORMATION
KEV RANGE
KEV RANGE 10-100
LATTICE VIBRATIONS
LOW TEMPERATURE
MEDIUM TEMPERATURE
METALS
MOESSBAUER EFFECT
NUMERICAL DATA
PHONONS
QUASI PARTICLES
SODIUM
SPECTRA