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Title: Synthesis, thermoluminescence and dosimetric properties of La-doped zinc borates
Authors: Keleş, Şule Kaya
Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü.
Küçük, Nil
Küçük, İlker Semih
Çakır, Merve
Keywords: Optics
Dose response
Zinc borate
Thermally stimulated luminescence
Boric acid
Synthesis (chemical)
X ray diffraction
Zinc oxide
Dose response
Dose-response curves
Dosimetric properties
High temperature peaks
Luminescence intensity
Properties of the powders
Issue Date: Jul-2013
Publisher: Elsevier
Citation: Küçük, N. vd. (2013). "Synthesis, thermoluminescence and dosimetric properties of La-doped zinc borates". Journal of Luminescence, 139, 84-90.
Abstract: Dependence on the dose of beta radiation of undoped and La-doped ZnB2O4 powder samples at 1%, 2%, 3%, 4%, 5% and 10% (by weight) was investigated by thermoluminescence technique. Powder samples were synthesized by the nitric acid method using the starting oxides [zinc oxide (ZnO), boric acid (H3BO3) and doped element oxide (La2O3)]. The samples were characterized by X-ray diffraction (XRD). The thermoluminescence (TL) properties of the powder samples were measured with Rise) TL/OSL DA-20 reader. 11 glow curves were obtained with heating at a constant heating rate of 5 degrees C/s up to 450 degrees C. The dose response curves of the powder samples exposed to Sr-90 beta radiation (40 mCi) were obtained in the dose range from 143 mGy to 60 Gy. Dose responses and minimum detectable dose (MDD) values for increasing radiation doses of the powder samples were determined. The dose responses of all the samples have shown a quite linear response to beta radiation. MDD value of 10% La-doped ZnB2O4 powder sample which shows a high temperature peak at 207 degrees C was determined as 4 mGy. MDD values for 1%, 2%, 3%, 4% and 5% La-doped ZnB2O4 powder samples were also determined as 10 mGy, 50 mGy, 10 mGy, 10 mGy and 30 mGy, respectively. Luminescence intensities of the powder samples were shown to be likely to be used for low radiation doses.
ISSN: 0022-2313
Appears in Collections:Scopus
Web of Science

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