Two-dimensional Thermoluminescence Dosimetry Using Al2O3:Cr Ceramics for 4, 6, and 10 MV X-ray Beams

We have studied the scintillation properties of non-doped and Pr-doped BaO-B 2 O 3 -SiO 2 glasses and glass-ceramics. The glass transition temperature (T g ), the temperature of crystallization onset (T x ), and the crystallization peak (T p ) were determined by differential thermal analysis. The glass-ceramics were obtained by heating at three different temperatures (T g + 50 °C, T x , and T p ). We confirmed that the X-ray diffraction peaks can be ascribed to the BaSiO 3 crystalline phase in the glass-ceramic samples. In the X-ray-induced scintillation spectra, we observed the intrinsic luminescence of the host glass and luminescence due to the 4f-4f transition of Pr 3+ ions. In addition, the 1% Pr-doped BaO-B 2 O 3 -SiO 2 glass-ceramic with heating at T g + 50 °C clearly showed luminescence in the wavelength range from 250 to 350 nm under X-ray excitation. Its photoluminescence (PL) decay time was estimated to be 26.28 ns and its luminescence is considered to be due to the 5f-4f transition of Pr 3+ ions.

Section: Introductionmentioning

confidence: 99%

Scintillation Properties of Non-doped and Pr-doped BaO–B2O3–SiO2 Glasses and Glass-ceramics

Kawaguchi¹,

Masai²,

Akatsuka³

et al. 2021

“…To detect ionizing radiation efficiently, the use of bulk materials is essential since the probability of an interaction between ionizing radiation and a detector material simply depends on the volume of the material. To satisfy this requirement, bulk single crystals, (9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) ceramics, (20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31) and glasses (32)(33)(34)(35)(36)(37)(38) have been applied for scintillators and dosimeters. Among these material forms, glasses have some advantages such as high chemical durability and high light transmittance, which are preferable for scintillator and dosimeter uses.…”

Section: Introductionmentioning

confidence: 99%

Scintillation Properties of Dy-doped 50NaPO3–50Al(PO3)3 Glasses

Yanagida¹,

Fujimoto²,

Masai³

et al. 2021

0.5, 1.0, 5.0, and 10.0 mol% Dy-doped 50NaPO 3 -50Al(PO 3 ) 3 glasses were synthesized by the melt-quenching method. All the samples had a high transmittance of up to 90% at visible wavelengths, and some intense emission lines were observed in their photoluminescence and scintillation spectra. When the glasses were irradiated with X-rays with various doses, a linear relationship between the irradiation dose and the thermally stimulated luminescence intensity was confirmed from 10 to 10000 mGy.

“…The photons obtained by the stimulation of heat or light are called thermally stimulated luminescence (TSL) and optically stimulated luminescence (OSL), respectively. (7) Since the TSL and OSL intensities are proportional to the incident radiation dose, storage phosphors are used for personal dose monitoring (8)(9)(10)(11)(12)(13) and imaging plates. (14)(15)(16)(17)(18)(19) So far, most research on scintillators and storage phosphors has been on various material forms including single crystals, (20)(21)(22)(23)(24) glasses, (25)(26)(27)(28)(29) and opaque ceramics.…”

Section: Introductionmentioning

confidence: 99%

Optical, TSL, and OSL Properties of Copper-doped Cesium Bromide Transparent Ceramics Prepared by SPS

Kimura¹,

Kato²,

Nakauchi³

et al. 2021

The optical, thermally stimulated luminescence (TSL), and optically stimulated luminescence (OSL) properties of CsBr:Cu transparent ceramics were evaluated. As the photoluminescence properties, two emissions around 460 and 490 nm related to Cu + and Cu 2+ ions, respectively, were observed under excitation at around 300 nm, and the quantum yield of CsBr:Cu (0.01%) was 17.3%. After X-ray irradiation, all the samples showed a broad TSL and OSL emission band around 400-500 nm. All the samples exhibited good proportionality in the TSL and OSL dose response functions in the dose ranges of 0.01-100 and 1-1000 mGy, respectively.