Relationship between Valence States of Copper in Aluminophosphate Glasses and the Emission Properties

Self Cite

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.

Section: Resultsmentioning

confidence: 99%

“…(52) Judging from the spectral shapes, the emission originated from 3d 10 -3d 9 4s transitions of the Cu + ion. (42,49,50) TSL dose response functions of CsBr:Cu transparent ceramics are shown in Fig. 7.…”

Section: Resultsmentioning

confidence: 99%

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

Kimura¹,

Kato²,

Nakauchi³

et al. 2021

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“…There have been many studies on the properties of scintillators and dosimetric materials in the last several decades, (2)(3)(4)(5)(6)12) and research on both types of phosphor materials is still an attractive topic. As recent studies on scintillators and dosimetric materials, single crystals, (19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31) sintered ceramics, (32)(33)(34)(35)(36)(37) glasses, (38)(39)(40)(41)(42)(43) eutectics, (44,45) plastics, (46) and organic-inorganic hybrid materials (47) have been reported. Among them, glass materials have the advantages of high transparency, formability, and chemical stability.…”

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

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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.

“…Thus, the RPL intensity can be repeatably read out, making it advantageous over TSL and OSL. (4) Phosphors exhibiting RPL include Ag-doped phosphate glasses, (5) Cu-doped glass, (6,7) Al 2 O 3 :C,Mg, (8) Eu-doped materials, (9,10) Sm-doped materials, (11,12) Yb-doped NaCl, (13) and LiF, (14,15) MgF 2 , (16) CaF 2 , (17,18) Mg 2 SiO 4 , (19) CaSO 4 , (20) K 2 CO 3 , (21) and Na 2 CO 3 . (22) The phosphors exhibiting RPL of greatest interest are currently Ag-doped phosphate glasses.…”

Section: Introductionmentioning

confidence: 99%

Ag Concentration Dependence of Build-up Effect of Radio-photoluminescence in Ag-doped P2O5–Al2O3–Na2O–SiO2 Glasses

Kato¹,

Shiratori²,

Iwao³

et al. 2021

Self Cite

In this paper, we evaluated the Ag concentration dependence of the build-up effect of radiophotoluminescence (RPL) in Ag-doped P 2 O 5 -Al 2 O 3 -Na 2 O-SiO 2 (PANS) glasses. After X-ray irradiation, the Ag-doped PANS glasses showed two emission peaks at around 460 and 630 nm, assigned to blue and orange RPL components, respectively. The build-up curves of the orange RPL component had two components corresponding to the formation of the + 2 Ag dimer and Ag 2+ ions. The intensity of the component due to the + 2Ag dimer increased with increasing Ag concentration, whereas that of the component due to Ag 2+ ions decreased. It is assumed that at a high Ag concentration, the Ag + ions have a higher probability of diffusing to Ag 0 sites to form the + 2 Ag dimer because the average distance between neighboring Ag atoms in the glass structure decreases with increasing Ag concentration. Therefore, the intensity of the component due to the + 2 Ag dimer was dominant at a high concentration of Ag in the glass structure.