Testing single aliquot regenerative dose (SAR) protocols for violet stimulated luminescence
| Autor: | Geoff A. T. Duller, Helen M. Roberts, Melissa S. Chapot, Debra Colarossi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010506 paleontology
Radiation Materials science business.industry Equivalent dose fungi Mean value 01 natural sciences 030218 nuclear medicine & medical imaging Background level body regions 03 medical and health sciences 0302 clinical medicine Optics skin and connective tissue diseases business Luminescence Instrumentation Sensitivity (electronics) 0105 earth and related environmental sciences |
| Zdroj: | Radiation Measurements. 120:104-109 |
| ISSN: | 1350-4487 |
| Popis: | Basic assumptions of the single aliquot regenerative dose (SAR) protocol are tested using the violet stimulated luminescence (VSL) signal from quartz. The VSL signal is shown to be reduced to a sufficiently low background level between SAR steps, and the SAR protocol appears to adequately correct for sensitivity changes during measurement. The VSL SAR protocol can recover a large (405 Gy) laboratory beta dose within uncertainties, however the mean value for the dose recovery ratio is commonly 0.8 or less. This poor behaviour is echoed in the measurements of equivalent dose (De) for a sample with an expected De of ∼354 Gy, which underestimates De by 50–70%. Further investigations are required to understand the mechanisms underlying these underestimations in VSL SAR De values. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect