Trap Spectra of Annealed Quartz

The trap energy density spectra of natural quartz were investigated by the fractional glow technique. The thermal treatment before excitation induces the changes of thermoluminescence sensitivity as well as the changes of trap spectrum. After annealing at temperature higher than 400°C, a new kind of trap is observed. The frequency factor was determinated by the fitting of the theoretical glow curve calculated using the trap depth measured by fractional glow technique to experimental one.