Optimization of an experimental TL protocol for discriminating the recombination pathways

The present work investigates an altered version of an already existing protocol that was utilized to study in depth the underlying mechanisms and phenomena of stimulated luminescence based on three phenomenological models. These phenomena are related to electron recombination pathways, including de-localized, localized, or semi-localized transitions. This new experiment consists of one new protocol, that requires prior specific heating treatments. It includes sets of 5 measurements per heating cycle and uses prompt isothermal decay (PID) following certain preheats under single high doses. The materials that are under study are the MgB4O7: Dy, Na (MBO) and BeOR, both having a localized peak in their dosimetric region. The protocol enables the examination of the recombination mechanisms of the traps and their trapping parameters, while also providing the ability to observe any potential transition between the two. Generally, the work concludes that the protocol can be utilized in both cases to find the recombination pathways, although the transition is only visible in the case of BeOR. Throughout the experimental analysis, it was pre-considered that MBO possesses two distinct excited states (trap energy levels). The validation of all experimental results was conducted using different techniques, such as the peak shape methods (PSM), the initial rise (IR) and the prompt isothermal decay (PID) deconvolution.

Automated summary

This study investigates an altered version of an existing protocol to study the mechanisms and phenomena of stimulated luminescence. The protocol allows for the examination of recombination mechanisms and trapping parameters of the traps, as well as the observation of potential transitions between two different states.