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Luminescence characteristics of Al-and Ca-doped BeO obtained via a sol-gel method

2019; Elsevier BV; Volume: 131; Linguagem: Inglês

10.1016/j.jpcs.2019.04.003

1879-2553

V. Altunal, V. Güçkan, A. Özdemir, N. Can, Z. Yeğingil,

Nuclear Physics and Applications

BeO, BeO:Al1%, BeO:Ca1%, and BeO:Al1%,Ca0.1% ceramics were synthesized by the sol-gel method. The X-ray luminescence was studied, and broad emission peaks located at 230 nm (∼5.4 eV) and 300 nm (∼4.1 eV) were observed. We investigated thermoluminescence peaks contributing to optically stimulated luminescence (OSL) signals for the ceramics. The thermal quenching of the OSL signals was evaluated, and the quenching energies were estimated as between approximately 0.5 eV and approximately 0.7 eV. To check the feasibility for dosimetry purposes, the dose response, reusability, and dark storage fading of the OSL signals were investigated. The dose response was observed to be linear between 0.1 and 100 Gy. The minimum detectable doses of BeO, BeO:Al1%, BeO:Ca1%, and BeO:Al1%,Ca0.1% were estimated as approximately 0.9 mGy, approximately 4 mGy, approximately 0.5 mGy, and approximately 0.5 mGy, respectively. Very good reusability was observed over ten cycles, with a maximum deviation of 2%. The results obtained from BeO:Al1%,Ca0.1% could be useful for OSL dosimetry, particularly in medical applications.