Optical and Scintillation Characteristics of Tb-doped La2Si2O7 Single Crystal

Self Cite

The optical and X-and γ-ray induced scintillation characteristics of Tb-doped SrY2O4 single crystals using the floating zone technique were evaluated. Under the UV and X-rays, the several lines in the range of 350 to 650 nm were observed in all the prepared crystals, which were attributed to the Tb3+ ions. In the pulse area spectra of a 137Cs γ-ray source, the full-energy absorption peak was conformed using a 1.0% Tb-doped crystal, and the light yield estimated to be 12,000 photons/MeV. 

Section: Experimental Methodsmentioning

confidence: 99%

Optical and scintillation characteristics of Tb-doped SrY₂O₄ single crystals

Kimura,

Fukushima,

Watanabe

et al. 2023

Self Cite

“…Such an event would be blamed for the main origin of IRF. The main decay component of both Lumilass-G9 and R7 was 1.3 ms, and this value was typical for scintillation of Tb 3+ - 67,68) and Eu 3+ -doped 69,70) phosphors. Scintillation decay times became faster than PL ones, which suggested that some quenching phenomena occurred during the energy transportation process.…”

Section: Optical Propertiesmentioning

confidence: 74%

Optical and scintillation properties of Lumilass-G and -R glasses

Yanagida,

Watanabe,

Kato

et al. 2023

Self Cite

Commercial phosphor glasses, namely, Lumilas-G9 and -R7 were investigated on their optical and scintillation characteristics. In transmittance, close to 90% transmission was achieved in both glasses at visible wavelength, and some specific absorption lines due to 4f-4f transitions of Tb3+ and Eu3+ were detected in Lumilass-G9 and -R7, respectively. In photoluminescence and scintillation, several sharp emission lines were observed in both glasses, and the emission origins of them were attributed to 4f-4f transitions of Tb3+ and Eu3+. Under pulse X-ray irradiation, scintillation decay time of both Lumilas-G9 and -R7 resulted 1.3 ms. To determine the scintillation light yield, α-rays from 241Am were irradiated to these samples, and the light yields of Lumilas-G9 and -R7 estimated by pulse area measurements turned out to be 700 and 1800 ph/MeV, respectively.

“…Single crystalline scintillators have been extensively investigated [15][16][17][18][19][20] owing to their high optical properties and high homogeneity. For instance, the following crystals are representatively implemented in practice: Bi 4 Ge 3 O 12 (BGO), [21][22][23][24] CdWO 4 (CWO), [25][26][27] and Tl-doped NaI and CsI.…”

Section: Introductionmentioning

confidence: 99%

Investigation of K₂Cu(Cl,Br)₃ crystalline scintillators

Yamabayashi,

Okazaki,

Nakauchi

et al. 2024

K2Cu(Cl,Br)3 crystals were prepared by the slow cooling method and evaluated for photoluminescence (PL) and scintillation properties. PL emission and scintillation peaks due to the recombination of excitons were observed at 400 nm. The PL quantum yields were estimated to be 61.0% for K2CuCl3, 72.7% for K2Cu(Cl0.5,Br0.5)3, and 75.8% for K2CuBr3, respectively. The scintillation decay curves were approximated by a single exponential function model, and the calculated decay time constants were 14–60 μs. The afterglow levels at 20 ms passed after X-ray irradiation were obtained to be 5–1225 ppm. The light yields of K2CuCl3 and K2Cu(Cl0.5,Br0.5)3 were 7700 and 9900 photons/MeV when calculated from the pulse height spectra under 137Cs γ-ray (662 keV) irradiation.