Date of Award
Doctor of Philosophy (PhD)
Department of Engineering Physics
John W. McClory, PhD.
Lithium aluminate (LiAlO2) is an insulating wide-band gap material currently under development for tritium breeding and radiation detection and dosimetry applications. Point defects are imperfections in a crystal lattice localized over a few atomic lengths that can alter the electrical, mechanical, or optical properties of materials. An understanding of point defect behavior is a necessary precursor for optimizing lithium aluminate for nuclear applications. This dissertation has identified and characterized the major point defects created and induced through x-ray and neutron radiation using electron paramagnetic resonance and fluorescence spectroscopy, thermoluminescence, and optical absorption. This dissertation explains for the first time the mechanism responsible for OSL in copper-diffused LiAlO2 and characterizes for the first time the hole (Li vacancies) and electron-trapping (F and F+ centers and transition-metal ions) defects. These results should prove useful to any researcher that utilizes LiAlO2 in applications involving radiation.
DTIC Accession Number
Holston, Maurio S., "Characterization of Point Defects in Lithium Aluminate (LiAlO2) Single Crystals" (2015). Theses and Dissertations. 220.