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

Aloraini D. A. | Zendy

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

Author(s) -

Aloraini D. A.

Publication year - 2020

Publication title -

luminescence

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.428

H-Index - 45

eISSN - 1522-7243

pISSN - 1522-7235

DOI - 10.1002/bio.3815

Subject(s) - thermoluminescence , rhyolite , irradiation , sensitization , materials science , radiochemistry , dosimetry , analytical chemistry (journal) , mineralogy , chemistry , nuclear medicine , optoelectronics , environmental chemistry , medicine , geology , geochemistry , volcanic rock , luminescence , nuclear physics , physics , volcano , immunology

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.

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