Dosimetric Probe Based on Small-thickness GaN Transducer
| Autor: | Patrice Jalade, Jean-Marc Galvan, Pierrick Guiral, Vincent Gelly, Guo-Neng Lu, Patrick Pittet |
|---|---|
| Přispěvatelé: | INL - Conception de Systèmes Hétérogènes (INL - CSH), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Centre Hospitalier Lyon Sud [CHU - HCL] (CHLS), Hospices Civils de Lyon (HCL) |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
business.industry Attenuation 02 engineering and technology General Medicine Radioluminescence 021001 nanoscience & nanotechnology Signal Mosaicity 030218 nuclear medicine & medical imaging Crystal [SPI]Engineering Sciences [physics] 03 medical and health sciences 0302 clinical medicine Quality (physics) Transducer Optoelectronics Wafer 0210 nano-technology business Engineering(all) ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Procedia Engineering Procedia Engineering, Elsevier, 2016, 168, pp.753-756. ⟨10.1016/j.proeng.2016.11.270⟩ |
| ISSN: | 1877-7058 |
| DOI: | 10.1016/j.proeng.2016.11.270 |
| Popis: | GaN dosimetric probe incorporates a small GaN crystal bulk as radioluminescence (RL) transducer. Our presented studies aimed to evaluate impacts of GaN crystallographic quality and self-absorption effects on the probe's RL output signal. Spectral analysis on three dosimetric probes fabricated using different GaN wafers shows strong dependence of RL emission on the GaN bulk's crystallographic quality. Mosaicity as well as dislocations may account for the decrease of band-edge (BE) emission in favor of yellow-band (YB) one. On the other hand, measuring RL attenuation inside GaN bulk versus transmission distance shows that self-absorption effects become significant for bulk thickness over a few hundreds of micrometers. We suggest thus using small-thickness (in the order of a few hundreds micrometers) and high-quality GaN crystal as transducer for the dosimetric probe. |
| Databáze: | OpenAIRE |
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