Date of Award
Master of Arts
Dr. George Bradley
Dr. Ralph Deal
Dr. Stanley Segel
Masters Thesis-Open Access
Since the introduction of the spin echoes technique by E. L. Hahn1 many studies have been made in the determination of the spin relaxation T2, spin-lattice relaxation T1, and the diffusion rates in gases, liquids2-5, and solids6-10. Hahn's methods were later improved by Carr and Purcell11. The Carr-Purcell method serves as the basic technique for this study.
Several studies have been published on the relaxation and diffusion rates in hydrocarbons12. These studies have shown:
1. The spin relaxation time T2, is independent of the temperature.
2. The coefficient of self-diffusion is logarithmic in reciprocal temperature.
3. The dependence of the coefficients of self-diffusion on temperature becomes more pronounced as the molecular weight is increased.
Because of its high signal to noise ratio and its broad line width, paraffin oil was chosen as the sample for this study. Because of paraffin oil's chemical properties the following behavior would be expected:
1. Paraffin oil is a hydrocarbon; T2 relaxation time should be temperature independent.
2. The coefficient of self-diffusion should be logarithmic in reciprocal temperature.
3. Because of the high molecular weight of the paraffin oil the temperature dependence of the self-diffusion should be highly pronounced.
Parker, "Nuclear Magnetic Relaxation and Diffusion in Paraffin Oil" (1965). Master's Theses. 4284.