Optimization of an experimental TL protocol for discriminating the recombination pathways

P G Konstantinidis; G S Polymeris; E Tsoutsoumanos; G Kitis

doi:10.1016/j.apradiso.2023.111106

Optimization of an experimental TL protocol for discriminating the recombination pathways

Appl Radiat Isot. 2024 Jan:203:111106. doi: 10.1016/j.apradiso.2023.111106. Epub 2023 Nov 8.

Authors

P G Konstantinidis¹, G S Polymeris², E Tsoutsoumanos³, G Kitis⁴

Affiliations

¹ Aristotle University of Thessaloniki, Physics Department, Nuclear Physics and Elementary Particles Physics Section, GR-54124, Thessaloniki, Greece. Electronic address: pavkonst@physics.auth.gr.
² Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", GR-15310, Ag. Paraskevi, Athens, Greece.
³ Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", GR-15310, Ag. Paraskevi, Athens, Greece; Condensed Matter Physics Laboratory, Physics Department, University of Thessaly, GR-35100, Lamia, Greece.
⁴ Aristotle University of Thessaloniki, Physics Department, Nuclear Physics and Elementary Particles Physics Section, GR-54124, Thessaloniki, Greece.

PMID: 37972514
DOI: 10.1016/j.apradiso.2023.111106

Abstract

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 BeO_R, 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 BeO_R. 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.

Keywords: BeO(R); Initial rise; Isothermal decay; MBO; Peak shape methods; Recombination pathways transition.