Proton magnetic resonance has been studied in methane and its deuterated modifications. Measurements
of relaxation time were carried out at a frequency
of 30 Mc/sec. using pulse techniques. The spin-lattice relaxation time has been measured in liquid and solid samples of CH₄, CH₃D, CH₂D₂ and CHD₃ between 110°K to 56°K. The simplest possible interpretation of our results in both the liquids and solids is that only one mechanism, that associated
with the inter-molecular interactions, is probably predominant in causing relaxation. The spin-rotational and intra-molecular dipolar interactions
do not seem to contribute appreciably to relaxation.
The effect of dissolved paramagnetic ions has also been studied in samples of CH₄ between 110°K - 78°K and we have developed a very simple and reliable technique for obtaining oxygen-free samples in order to study T₁ in pure samples because T₁ has been found by us to be very sensitive to small, amounts of oxygen. The results verify the invers proportionality of T₁ to the oxygen concentration.
The spin-spin relaxation time T₂ has been measured in liquid and solid samples between 110°K and 56°K. The results show that the line shape is predominantly due to inter-molecular interactions. Furthermore the resonance line has a gaussian shape at temperatures below 65°K and changes to a Lorentzlan shape at higher temperatures. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/38803 |
| Date | January 1964 |
| Creators | Sandhu, Harbhajan Singh |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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