Deuterium motion in yttrium studied by ultrasonic measurements
- Department of Physics, Colorado State University, Fort Collins, Colorado 80523 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Department of Physics, Iowa State University, Ames, Iowa 50011 (United States)
- Department of Physics, University of Trondheim, NTH, N-7034 Trondheim (Norway)
- Institut Laue Langevin, Grenoble (France)
Ultrasonic-attenuation measurements in YD[sub 0.10] reveal broad, asymmetric attenuation peaks that are interpreted in terms of rapid motion of deuterium among interstitial sites in the Y metal lattice. The results are well described with a model involving tunneling among highly asymmetric sites. A weakly temperature-dependent relaxation rate, compatible with coupling of the sites to electrons, accounts for the relaxation up to about 70 K. At higher temperatures a strongly temperature-dependent relaxation rate becomes dominant. The major asymmetries that are responsible for the coupling of the tunneling centers to the ultrasound are attributed to the interaction between D atoms that lie on [ital different] [ital c] axes.
- OSTI ID:
- 6490710
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:2; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
ATOM TRANSPORT
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEUTERIDES
DEUTERIUM
DEUTERIUM COMPOUNDS
DIFFUSION
ELASTICITY
ELEMENTS
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
INTERSTITIALS
ISOTOPES
LIGHT NUCLEI
MECHANICAL PROPERTIES
METALS
NEUTRAL-PARTICLE TRANSPORT
NUCLEI
ODD-ODD NUCLEI
POINT DEFECTS
RADIATION TRANSPORT
RELAXATION
SOUND WAVES
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TENSILE PROPERTIES
TRANSITION ELEMENTS
TRANSPORT THEORY
ULTRASONIC WAVES
YTTRIUM