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Surface and bulk defects in cadmium zinc telluride and cadmium manganese telluride crystals

dc.creatorBabalola, Oluseyi Stephen
dc.date.accessioned2020-08-23T15:51:18Z
dc.date.available2009-11-23
dc.date.issued2009-11-23
dc.identifier.urihttps://etd.library.vanderbilt.edu/etd-11232009-114308
dc.identifier.urihttp://hdl.handle.net/1803/14742
dc.description.abstractThis 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.
dc.format.mimetypeapplication/pdf
dc.subjectinclusions
dc.subjectprecipitates
dc.subjectroom temperature
dc.subjectNuclear detector
dc.titleSurface and bulk defects in cadmium zinc telluride and cadmium manganese telluride crystals
dc.typedissertation
dc.contributor.committeeMemberPro. Arnold Burger
dc.type.materialtext
thesis.degree.namePHD
thesis.degree.leveldissertation
thesis.degree.disciplineInterdisciplinary Materials Science
thesis.degree.grantorVanderbilt University
local.embargo.terms2009-11-23
local.embargo.lift2009-11-23
dc.contributor.committeeChairProf. Leonard C. Feldman


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