TY - JOUR
T1 - Optical, scintillation and radiation tolerance properties of Pr-doped pyrosilicate crystals
AU - Yanagida, Takayuki
AU - Watanabe, Kenichi
AU - Okada, Go
AU - Kawaguchi, Noriaki
N1 - Funding Information:
This work was supported by Grant-in-Aid for Scientific Research (A) (17H01375 and 18K14158) from the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT) as well as A-STEP from Japan Science and Technology Agency (JST). The Cooperative Research Project of Research Institute of Electronics, Shizuoka
Funding Information:
University, Terumo Foundation for Life Sciences and Arts, Izumi Science and Technology Foundation, SEI Group CSR Foundation, The Kazuchika Okura Memorial Foundation, and The Iwatani Naoji Foundation are also acknowledged.
Publisher Copyright:
© 2018 The Japan Society of Applied Physics.
PY - 2018/10
Y1 - 2018/10
N2 - A series of Pr-doped pyrosilicate crystals, Y2Si2O7 (YPS), Pr2Si2O7 (PrPS), Gd2Si2O7 (GPS), and Lu2Si2O7 (LPS), were synthesized by the floating zone (FZ) method to investigate whether the positive hysteresis phenomenon was observed or not. In all crystals, no impurity phases were observed in X-ray diffraction (XRD) analyses. In photoluminescence (PL) spectra, Pr3+ 5d-4f emission was observed from 270 to 400 nm in all the samples, and the PL decay times of them were around 10 ns. In radioluminescence (RL) spectra, they showed Pr3+ 5d-4f emission from 270 to 400 nm in all the samples, and the scintillation decay times were around 20 ns. When we irradiated with γ-rays from 137Cs, the scintillation light yields of YPS, GPS, and LPS were 8300, 1800, and 9700 ph/MeV, respectively. After these basic characterizations, we irradiated 0, 200, and 400 Gy γ-rays exposure by using 60Co. As a result, the positive hysteresis was not observed and YPS and LPS showed relatively high radiation resistivity.
AB - A series of Pr-doped pyrosilicate crystals, Y2Si2O7 (YPS), Pr2Si2O7 (PrPS), Gd2Si2O7 (GPS), and Lu2Si2O7 (LPS), were synthesized by the floating zone (FZ) method to investigate whether the positive hysteresis phenomenon was observed or not. In all crystals, no impurity phases were observed in X-ray diffraction (XRD) analyses. In photoluminescence (PL) spectra, Pr3+ 5d-4f emission was observed from 270 to 400 nm in all the samples, and the PL decay times of them were around 10 ns. In radioluminescence (RL) spectra, they showed Pr3+ 5d-4f emission from 270 to 400 nm in all the samples, and the scintillation decay times were around 20 ns. When we irradiated with γ-rays from 137Cs, the scintillation light yields of YPS, GPS, and LPS were 8300, 1800, and 9700 ph/MeV, respectively. After these basic characterizations, we irradiated 0, 200, and 400 Gy γ-rays exposure by using 60Co. As a result, the positive hysteresis was not observed and YPS and LPS showed relatively high radiation resistivity.
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U2 - 10.7567/JJAP.57.106401
DO - 10.7567/JJAP.57.106401
M3 - Article
AN - SCOPUS:85055285789
SN - 0021-4922
VL - 57
JO - Japanese journal of applied physics
JF - Japanese journal of applied physics
IS - 10
M1 - 106401
ER -