The theoretical and experimental aspects of Nuclear Quadrupole Resonance (NQR) spectroscopy are examined with respect to instrumentation and experimental methodology. The interaction of the quadrupolar moment with the electric field gradient is derived from first principles and extended to include transient experiments. The response of the nuclear magnetization to a single pulse for a spin I = 3/2 system, assuming zero asymmetry, is calculated exactly under the Bloom, Hahn and Herzog model and applied to the NQR spin-lattice (T$ sb1$) relaxation in polycrystalline solids. / The theory and use of available NQR methods of detection are treated extensively. Improvements to the conventional super-regenerative methods are proposed and the design of a new solid-state detector is given. Pulsed spectroscopic techniques are also treated in detail and approaches to variable temperature design, probe development and other instrumental considerations are discussed. / The temperature dependence of the NQR frequencies and spin-lattice relaxation times (T$ sb1$) are examined in a series of model compounds for a variety of different nuclear species. A predictive model for the temperature dependence of compounds which exhibit "normal" Bayer temperature dependence is presented. In addition, T$ sb1$ relaxation times are used to analyze the molecular motions in a series of main group halides.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.74278 |
| Date | January 1990 |
| Creators | Koukoulas, Alexander Anthony |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (Department of Chemistry.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001072570, proquestno: AAINN63470, Theses scanned by UMI/ProQuest. |
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