Department of Physics and Astronomy
Master of Science
This investigation has demonstrated that some aluminum oxide crystals have high sensitivity and are well suited for detecting and measuring ultraviolet radiation rates significantly less than 0.1 pW/cm2. The thermoluminescent glow curve, linearity of response, and fading of the crystals were determined. An action spectrum was performed to determine the relative sensitivities of several crystals in a range of wavelengths from 230 nm to 546 nm. The sensitivity of the crystals was found to decrease as a function of exposure. An explanation for the decrease in sensitivity due to the presence of high temperature traps is presented. This investigation has demonstrated that certain aluminum oxide crystals exhibit ultraviolet response characteristics necessary to meet the criteria set forth by the Occupational Safety and Health Administration for the detection and measurement of low levels of ultraviolet radiation.
Ryan, Edward, "Ultraviolet Stimulated Thermoluminescent Response Characteristics of Aluminum Oxide" (1976). Masters Theses & Specialist Projects. Paper 1039.