Time-Resolved Luminescence: Models

Abstract

In this chapter we discuss experimental data and models for time-resolved optically and infrared stimulated luminescence (TR-OSL, TR-IRSL). These techniques can help researchers understand the luminescence mechanisms involved in dosimetric materials. We provide an overview and several examples of TR-OSL experimental data from different dosimetric materials. The models and corresponding analytical equations from delocalized models, as well as from the localized transition excited state tunneling model (EST), are summarized, and Python codes are used to study the effect of model parameters on the TR signals. The temperature dependence of luminescence lifetimes and luminescence intensity from TR experiments in quartz and other materials are discussed within the framework of a thermal quenching model of luminescence. This model has been well known for several decades, and is commonly described using the Mott-Seitz mechanism. The Python code for a TR-photoluminescence model (TR-PL) for the important dosimetric material Al$_{2}$O$_{3}$:C is presented. In the next chapter we will apply these models and analytical equations to analyze experimental TR-OSL and TR-IRSL data.