Sensitization of natural rhyolite rock using high gamma doses for thermoluminescence dosimetry

The current study presents rhyolite as a novel and promising natural thermoluminescence emission (TL) material. The work focused on enhancing the TL sensitivity of rhyolite via optimization of the processing conditions: annealing and pre‐dose effect. The glow curves of irradiated rhyolite sample sho...

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Bibliographic Details
Published in:Luminescence (Chichester, England) England), 2020-11, Vol.35 (7), p.1043-1047
Main Author: Aloraini, D. A.
Format: Article
Language:English
Subjects:
Air temperature
Dosimeters
Dosimetry
Emission analysis
Glow curves
Heating rate
Irradiation
natural rhyolite rock
Optimization
pre‐dose effect
Radiation
Radiation dosage
Rhyolite
Rhyolites
Room temperature
Sensitivity enhancement
sensitization
Thermoluminescence
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Summary:The current study presents rhyolite as a novel and promising natural thermoluminescence emission (TL) material. The work focused on enhancing the TL sensitivity of rhyolite via optimization of the processing conditions: annealing and pre‐dose effect. The glow curves of irradiated rhyolite sample showed a single peak of about 110°C at 5°C sec–1 heating rate. Sensitization was performed following Fleming’s sensitization technique. It was found that applying 1 kGy pre‐dose irradiation, followed by thermal activation at 550°C for 1 h, and cooling in air at room temperature were the optimum conditions for TL sensitivity improvement of this 110°C glow peak. Both nonsensitized and sensitized rhyolite have linear behaviour in the range 5–1500 Gy. The obtained results present rhyolite as a material for potential dosimetry applications.
ISSN:1522-7235
1522-7243
DOI:10.1002/bio.3815