A novel coupled RPL/OSL system to understand the dynamics of the metastable states
| Autor: | Myung Ho Kook, Raju Kumar, Mayank Jain |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
010506 paleontology
Photoluminescence Optically stimulated luminescence FOS: Physical sciences lcsh:Medicine Electron Trapping 01 natural sciences Article 030218 nuclear medicine & medical imaging Physics - Geophysics 03 medical and health sciences Medical research 0302 clinical medicine Persistent luminescence Metastability lcsh:Science 0105 earth and related environmental sciences Condensed Matter - Materials Science Multidisciplinary Physics lcsh:R Materials Science (cond-mat.mtrl-sci) Penning trap Materials science Geophysics (physics.geo-ph) Environmental sciences Optics and photonics Chemical physics lcsh:Q Luminescence Climate sciences |
| Zdroj: | Scientific Reports, Vol 10, Iss 1, Pp 1-15 (2020) Jain, M, Kumar, R & Kook, M 2020, ' A novel coupled RPL/OSL system to understand the dynamics of the metastable states ', Scientific Reports, vol. 10, no. 1, 15565 . https://doi.org/10.1038/s41598-020-72434-4 Scientific Reports |
| DOI: | 10.1038/s41598-020-72434-4 |
| Popis: | Metastable states form by charge (electron and hole) capture in defects in a solid. They play an important role in dosimetry, information storage, and many medical and industrial applications of photonics. Despite many decades of research, the exact mechanisms resulting in luminescence signals such as optically/thermally stimulated luminescence (OSL or TL) or long persistent luminescence through charge transfer across the metastable states remain poorly understood. Our lack of understanding owes to the fact that such luminescence signals arise from a convolution of several steps such as charge (de)trapping, transport and recombination, which are not possible to track individually. Here we present a novel coupled RPL(radio-photoluminescence)/OSL system based on an electron trap in a ubiquitous, natural, geophotonic mineral called feldspar (aluminosilicate). RPL/OSL allows understanding the dynamics of the trapped electrons and trapped holes individually. We elucidate for the first time trap distribution, thermal eviction, and radiation-induced growth of trapped electron and holes. The new methods and insights provided here are crucial for next generation model-based applications of luminescence dating in Earth and environmental sciences, e.g. thermochronometry and photochronometry. Manuscript accepted in Scientific Reports (https://www.nature.com/srep/) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|