Scintillation Light Yields of Tb-doped SiO2 Glasses

Abstract

We investigated the scintillation light yields of Tb-doped SiO 2 glasses. We prepared 0.05, 0.1, and 0.5% Tb-doped SiO 2 glasses by melting and solidifying sintered ceramic rods using an oxygen burner. The obtained samples showed no crystalline phases in X-ray diffraction measurements. Pulse height spectra of the Tb-doped SiO 2 samples were measured under γ-ray excitation using a measurement system for slow decay pulses. The number of channels at the Compton edge of the 0.5% Tb-doped sample was the highest and was approximately 50% of that of a commercial lithium glass scintillator (GS20). By considering the light yield of GS20 and the wavelength dependence of the quantum efficiency of the photomultiplier tube, the light yield of the 0.5% Tb-doped SiO 2 sample was estimated as 3800 photons/MeV.

Optical and scintillation characteristics of Tb-doped SrY2O4 single crystals

“…The positions of emission peaks were agreed with the reported results of Tb-doped phosphors. [31][32][33][34] In contrast, the changes in each emission spectral intensities were confirmed because of the effect of self-absorption assigned to the Tb 3+ ions. Among the prepared crystals, the optimal concentration of Tb was 0.5% from the result of QY.…”

Dopant concentration dependence on optical and scintillation properties of Eu-doped Gd3Al2Ga3O12 single crystals

“…Pulse height spectra were recorded by using the customized setup which can measured decay curves with few ms-order scale. 44,45) Considering the sensitivity of detection wavelength region, a NIR sensitive PMT (R7600U-20; Hamamatsu Photonics) was used. The applied voltage of this PMT was set at −700 V. To estimate the LYs of the GAGG:Eu single crystals, photoelectric absorption peak positions of the samples were compared with that of the commercial BGO single crystal.…”

Photoluminescence and Radioluminescence Properties of Y3Al5O12 Doped with 3d-Transition Metal Ions

“…Although many scintillators have been studied in the last few decades, (4)(5)(6)(7) fundamental studies on novel scintillators still continue to achieve better performance than ever before. There have been reports on various types of scintillator, such as single crystals, (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21) nanocrystals, (22) crystalline films, (23) ceramics, (24)(25)(26)(27) glasses, (28)(29)(30)(31)(32)(33)(34)(35)(36)(37) plastics, (38) and organic-inorganic hybrid materials, (39)(40)(41)(42) even in the last few years. In terms of the luminescent center, specific dopants such as Ce, Eu, and Tl have been mainly used for commercial scintillators; however, other dopants are also of our interest.…”