Temperature Dependence of Proton NMR Relaxation Times at Earth's MagneticField*

In this study, we have investigated the spin-lattice relaxation time (T₁) of water-glycerol mixtures at the earth's magnetic field. The water ¹H T₁'s at differing ratios of water-glycerol contents were measured at different temperatures ranging from 253.15 K to 353.15 K. Our results indicate that, water ¹H T₁ increases linearly with temperature. The addition of higher glycerol content into the mixture decreases the slope of this linear relationship and, disrupts the linearity of this behavior at low temperatures. Our experimental results are compared to the theoretical predictions in light of the Bloembergen-Pound-Purcell (BPP) theory, where a remarkable agreement between the theory and the experiment is observed.