/sup 2/D relaxation times in vanadium, niobium and tantalum deuterides

Thesis/Dissertation · Mon Dec 31 23:00:00 EST 1979

OSTI ID:5583130

Salibi, N M

The longitudinal and transverse relaxation times are measured in the ..cap alpha..(..cap alpha..')-phase of powdered vanadium, niobium and tantalum deuterides over temperatures ranging from 27/sup 0/C to 310/sup 0/C. The dipolar, quadrupolar and electronic contributions to /sup 2/D relaxation are determined. The quadrupolar frequencies and activation energies of the diffusing deuterons are calculated. The effects of diffusion in the presence of magnetic and electric field inhomogeneities are discussed. Pulsed nuclear magnetic resonance at 7.55 MHz is used to measure the spin-lattice and the spin-spin relaxation times (T). A 180-tau-90 pulse sequence is used to measure T/sub 1/. The Carr-Purcell-Meiboom-Gill, Wayne-Zamir-Strange and 90-tau-180 pulse sequences are used to measure T/sub 2/. Published nuclear magnetic resonance data on /sup 1/H in vanadium, niobium and tantalum hydrides are compared to the /sup 2/D data in the deuterides and used in their analysis.

• OSTI ID: 5583130
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202* -- Isotope Effects
Isotope Exchange
& Isotope Separation
ACTIVATION ENERGY
CHARGED PARTICLES
COMPARATIVE EVALUATIONS
DEUTERIUM
DEUTERIUM COMPOUNDS
DEUTERONS
DIPOLE MOMENTS
ELECTRIC FIELDS
ENERGY
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
INHOMOGENEOUS FIELDS
ISOTOPE EFFECTS
ISOTOPES
LIGHT NUCLEI
MAGNETIC FIELDS
MAGNETIC RESONANCE
MEDIUM TEMPERATURE
NIOBIUM COMPOUNDS
NIOBIUM HYDRIDES
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ODD-ODD NUCLEI
POWDERS
PULSE TECHNIQUES
QUADRUPOLE MOMENTS
RELAXATION
RESONANCE
SPIN-LATTICE RELAXATION
SPIN-SPIN RELAXATION
STABLE ISOTOPES
TANTALUM COMPOUNDS
TANTALUM HYDRIDES
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM HYDRIDES