Deuteron magnetic resonance in transition metal deuterides
Fourier-transform spectra were taken and relaxation rates T/sub 1/ and T/sub 1rho/, were measured for /sup 2/D in various phases of powdered vanadium, niobium and tantalum deuterides. Comparison with proton relaxation rates reported in similar metal hydrides permits identification of dipolar contributions to the deuteron relaxation rates. The deuteron relaxation in ..cap alpha..-phase is primarily quadrupolar, but becomes dipolar after transition to the ..cap alpha.. + ..beta.. mixed phase. As the temperature is lowered and zeta or eta phases appear, quadrupolar relaxation again dominates T/sub 1/ and T/sub 1rho/. Quadrupole coupling frequencies and activation energies are determined. Phase relationships among the ordered-disordered phases and superstructures of the various components in these samples are discussed. A Bruker CXP-200 spectrometer and a deuterium resonance frequency of 30.709 MHz were used. Measurements were made between 150 and 450 K.
- Research Organization:
- Washington Univ., St. Louis, MO (USA)
- OSTI ID:
- 5490344
- Country of Publication:
- United States
- Language:
- English
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360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
BARYONS
CHARGED PARTICLES
COMPARATIVE EVALUATIONS
DEUTERIDES
DEUTERIUM COMPOUNDS
DEUTERONS
ELEMENTARY PARTICLES
FERMIONS
FOURIER TRANSFORMATION
HADRONS
HYDROGEN COMPOUNDS
INTEGRAL TRANSFORMATIONS
MAGNETIC RESONANCE
NIOBIUM COMPOUNDS
NUCLEONS
PROTONS
REFRACTORY METAL COMPOUNDS
RELAXATION TIME
RESONANCE
TANTALUM COMPOUNDS
TRANSFORMATIONS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS