Nuclear-Magnetic-Resonance Analysis of Hydrogen Motion in Hydrides

A comparison of the results from analyzing spin-lattice relaxation times ($T_1$) of diffusing spins using an exponential correlation function and the isotropic model of Torrey has been made. Data from Sc${\mathrm{H}}_{1.7}$, Ti${\mathrm{H}}_{1.55}$, and Ti${\mathrm{T}}_{1.5}$ were used. No significant difference was found for activation energies, the isotope effect, or minimum $T_1$ using the two models.