Improvement of Scintillation Characteristics of FZ Growth Ce:GPS Crystals by Annealing in Air

Nishiyama, Shusuke; Kawamura, S.; Kaneko, Junichi; Higuchi, Mikio; Ueda, Suguru; Kurashige, K.; Ishibashi, Hiroyuki; Fujita, Fumiyuki; Homma, A.; Furusaka, M.

doi:10.15669/pnst.1.279

Cited by 14 publications

(7 citation statements)

References 18 publications

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“…Recently, a cerium-doped Gd 2 Si 2 O 7 (GPS) has been developed that is suitable for alpha particle detectors because it has high light output to alpha particles [9][10] and improved performance [11]. Because light yield of GPS was reported to be 4.4 times higher than that of BGO scintillator [10] and the light yield of the BGO is 8200 photons/MeV [2], the light yield of the GPS would be about 36000 photons/MeV.…”

Section: Introductionmentioning

confidence: 99%

Performance comparison of scintillators for alpha particle detectors

Morishita

Yamamoto

Izaki

et al. 2014

Nuclear Instruments and Methods in Physics Research Section A:

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Scintillation detectors for alpha particles are often used in nuclear fuel facilities. Alpha particle detectors have also become important in the research field of radionuclide therapy using alpha emitters. ZnS(Ag) is the most often used scintillator for alpha particle detectors because its light output is high. However, the energy resolution of ZnS(Ag)-based scintillation detectors is poor because they are not transparent. A new ceramic sample, namely the cerium doped Gd 2 Si 2 O 7 (GPS) scintillator, has been tested as alpha particle detector and its performances have been compared to that one of three different scintillating materials: ZnS(Ag), GAGG and a standard plastic scintillator. The different scintillating materials have been coupled to two different photodetectors, namely a photomultiplier tube (PMT) and a Silicon Photo-multiplier (Si-PM): the performances of each detection system have been compared. Promising results as far as the energy resolution performances (10% with PMT and 14% with Si-PM) have been obtained in the case of GPS and GAGG samples. Considering the quantum efficiencies of the photodetectors under test and their relation to the emission wavelength of the different scintillators, the best results were achieved coupling the GPS with the PMT and the GAGG with the Si-PM

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Section: Introductionmentioning

confidence: 99%

Performance comparison of scintillators for alpha particle detectors

Morishita

Yamamoto

Izaki

et al. 2014

Nuclear Instruments and Methods in Physics Research Section A:

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“…Two peaks of light output occurred at cerium concentrations of 1.0-2.5% and 10-15% 7) . Improvement of light output by annealing in air or N 2 atmosphere has also been reported 8) .…”

Section: K0"kpvtqfwevkqp 3 "mentioning

confidence: 75%

Response Measurement of Gd2Si2O7:Ce Scintillator for Alpha Particles

Tsubota

Kaneko

Kondo

et al. 2012

Progress in Nuclear Science and Technology

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KK0"Gzrgtkogpvcn 30"Et{uvcn"Itqyvj" Raw materials were powders of Gd 2 O 3 , SiO 2 , and CeO 2 with 4N purity. These were weighed and mixed at compositions of (Gd 1-x Ce x) 2 Si 2 O 7 (x=0.010, 0.025, 0.10). Amounts of SiO 2 in raw materials were slightly larger than those necessary for stoichiometry to obtain silica-rich conditions. The mixed powders were pressed and then sintered at 1650qC for 6 hr in air. The sintered material was set into an iridium crucible in a RF type Czochralski furnace. Sintered GPS rods with 5mm diameter were chosen as crystal seeds, because there was no crystal that would be large enough for seed. The growth rate and rotation ratio was set respectively at 0.5 mm/h and 20

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“…Such annealing also has a positive effect on the scintillation characteristics of rare-earth silicate crystals [13][14][15] obtained in a weakly oxidizing atmosphere from iridium crucibles, in particular, crystals based on gadolinium and lutetium pyrosilicates. 16,17 This work is aimed to enhance the preparation process of LaGPS:Ce to improve the scintillation performance of LaGPS:Ce obtained in a reducing atmosphere from a W crucible. We performed a detailed characterization of the obtained crystals annealed in oxidizing conditions at different temperatures.…”

Section: Introductionmentioning

confidence: 99%