This dissertation reports the study of defects in Cadmium Zinc Telluride (CZT) and Cadmium Manganese Telluride (CMT) nuclear detectors. In this dissertation I studied the defects associated with surface processing of detectors as well as the extended defects present in the crystals. Synchrotron radiation, Infrared microscopy and Atomic Force Microscopy were employed to identify and study the defects. Detector response and performance from x-ray mapping and external sources was correlated with the observed defects. The Pockels electro-optic effect was used to observe non-uniformities of the internal electric field caused by defects. This collection of data was employed to produce a counting algorithm to show the expected performance of detectors based on sizes, concentration and distribution of inclusions. An optimal surface processing method combining polishing and chemical etching was established. Finally the first response of a CMT detector to high energy gamma radiation was demonstrated.
| Identifer | oai:union.ndltd.org:VANDERBILT/oai:VANDERBILTETD:etd-11232009-114308 |
| Date | 23 November 2009 |
| Creators | Babalola, Oluseyi Stephen |
| Contributors | Pro. Arnold Burger, Prof. Leonard C. Feldman |
| Publisher | VANDERBILT |
| Source Sets | Vanderbilt University Theses |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.library.vanderbilt.edu/available/etd-11232009-114308/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Vanderbilt University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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