Thermal Luminescence of Ho₂O₃‐PbO‐Al₂O₃‐SiO₂ Glasses Exposed to Gamma Radiation

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 c-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 À 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.

Thermoluminscence characteristics and dosimetric parameters of Nd+3 doped alkali borosilicate glass

“…Borate glasses doped with alkali metal ions and/or rare earths have been extensively studied as thermoluminescence dosimetric materials; because they have several dosimetric properties compared with the other glass dosimeters …”

“…1 Borate glasses doped with alkali metal ions and/or rare earths have been extensively studied as thermoluminescence dosimetric materials; because they have several dosimetric properties compared with the other glass dosimeters. [2][3][4][5][6][7][8][9] A borate glass-with minute amounts of impurities that are typically existent in most samples-is experienced to a formation of electron-hole pairs, as well as trapping charge carriers at the defect centers of the sample upon exposure to ionizing radiation. Up to the moment, researchers have extensively discussed the different mechanisms of luminescence in borate glasses.…”

Thermoluminescence features of alumina‐mixed borophosphate glasses with Tb3+ ions for dosimetric applications

“…4,10,[17][18][19] Keeping these studies in mind, we have chosen this composition for the present study. In our previous studies on silicate, phosphate, borophosphate, and SiO 2 -P 2 O 5 glasses doped with rare earth/ transition metal ions, it was found that Al 2 O 3 (when mixed in this concentration range) influences photoluminescence, thermoluminescence, and electrical properties to a large extent.…”

“…In our previous studies on silicate, phosphate, borophosphate, and SiO 2 -P 2 O 5 glasses doped with rare earth/ transition metal ions, it was found that Al 2 O 3 (when mixed in this concentration range) influences photoluminescence, thermoluminescence, and electrical properties to a large extent. 4,10,[17][18][19] Keeping these studies in mind, we have chosen this composition for the present study. The glasses were prepared by melt-quenching technique using appropriate amounts of analytical-grade reagents of BaCO 3 , P 2 O 5 , B 2 O 3 , Tb 2 O 3 (obtained from Metall Rare Earth Ltd, Shenzhen, China), and Al 2 O 3 powders.…”

Comparative effectiveness of technical and regulatory innovations to reduce the burden of electronic waste

“…For the 13 WEEE, Pb ranges from 7 to 39 941 mg/kg, mainly found in solders (Rawat et al, 2020). For CRT TV, Pb is mainly found in CRT glass (Wang et al, 2019), for preventing radiation (Bhargavi et al, 2015). This is also the reason why CRT TV holds the highest content of Pb and Ba (20 670 mg/kg), while the content of Ba in the other 12 WEEE is 0.4 to 4745 mg/kg.…”