Thermal Luminescence of H o 2 O 3 ‐ P b O ‐ A l 2 O 3 ‐ S i O 2 Glasses Exposed to Gamma Radiation
Source abstract
Abstract
Thermoluminescence ( TL ) characteristics of PbO‐Al 2 O 3 ‐SiO 2 : Ho 3+ glass system mixed with different concentrations of Al 2 O 3 were studied in the temperature range 0–300°C. The samples were exposed to γ‐rays in the dose range of 0–5 kGy. The glow curves of the samples exposed >1.0 kGy, exhibited a dosimetric peak at about 209°C. With the increase of the dose up to 5 kGy, the TL light output increased considerably, and the peak was shifted towards higher temperature. A linear dose‐dependent enhancement of the TL emission was also found for the glasses mixed with 5 and 8 mol% Al 2 O 3 . However, the glass mixed with 10 mol% Al 2 O 3 exhibited supralinearity beyond 3 kGy. The mechanisms responsible for TL emission and enhancement of TL output were discussed in view of the results obtained from optical absorption, IR , and Raman spectral studies. The results suggested that both e − and h + trapped centers were generated at the deeper trap levels and gave TL emission at higher temperatures. In the dose range of 2–5 kGy, the dose–response was found to be linear and could be useful for dosimetry in commercial radiation processing of perishable food commodities.
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Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Glass properties and applications · Solid State Laser Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics Acharya Nagarjuna University Nagarjuna Nagar Guntur AP 522 510 India
Food Technology Division Bhabha Atomic Research Centre Trombay Mumbai 400 085 India
Department of Physics KakaniVenkataRatnam College Nandigama AP 521 185 India
Department of Physics Andhra Loyola College Vijayawada AP 520008 India
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