TY - JOUR
T1 - Storage luminescence and scintillation properties of Eu-doped SrAl2O4 crystals
AU - Nakauchi, Daisuke
AU - Okada, Go
AU - Koshimizu, Masanori
AU - Yanagida, Takayuki
N1 - Funding Information:
This work was supported by a Grant in Aid for Scientific Research (A)-26249147 from the Ministry of Education, Culture, Sports, Science and Technology of the Japanese government (MEXT) and partially by JST A-step. Green Photonics Research from MEXT is also acknowledged. It is also partially supported by the Murata Science Foundation and a cooperative research project of the Research Institute of Electronics, Shizuoka University.
Publisher Copyright:
© 2016 Published by Elsevier B.V.
PY - 2016/8
Y1 - 2016/8
N2 - Eu-doped SrAl2O4 (Eu:SrAl2O4) crystals are prepared by a floating zone (FZ) method. In photoluminescence (PL), an intense broad emission peak around 510 nm due to 5d-4f transition of Eu2+ appear under excitation at 250-450 nm. The PL decay time constants are about 800 ns due to the 5d-4f transitions of Eu2+. In the nondoped sample, emission peaks around 480 and 560 nm are observed upon excitation at 316 nm. The X-ray induced scintillation spectra also show an intense broad emission peak around 510 nm, and the decay time constants are approximately 500 ns. In the pulse height spectra of the 2.5% Eu:SrAl2O4 crystal, the absolute light yield is ∼46,000 ph/MeV. In thermally stimulated luminescence (TSL) after X-ray irradiation, strong TSL glow peaks are observed at 120 and 400°C. In optically stimulated luminescence (OSL) after X-ray irradiation, emission peaks are observed around 510 nm while exposing the samples to the stimulation light at 800 nm.
AB - Eu-doped SrAl2O4 (Eu:SrAl2O4) crystals are prepared by a floating zone (FZ) method. In photoluminescence (PL), an intense broad emission peak around 510 nm due to 5d-4f transition of Eu2+ appear under excitation at 250-450 nm. The PL decay time constants are about 800 ns due to the 5d-4f transitions of Eu2+. In the nondoped sample, emission peaks around 480 and 560 nm are observed upon excitation at 316 nm. The X-ray induced scintillation spectra also show an intense broad emission peak around 510 nm, and the decay time constants are approximately 500 ns. In the pulse height spectra of the 2.5% Eu:SrAl2O4 crystal, the absolute light yield is ∼46,000 ph/MeV. In thermally stimulated luminescence (TSL) after X-ray irradiation, strong TSL glow peaks are observed at 120 and 400°C. In optically stimulated luminescence (OSL) after X-ray irradiation, emission peaks are observed around 510 nm while exposing the samples to the stimulation light at 800 nm.
KW - Dosimeter
KW - Optically stimulated luminescence
KW - Scintillator
KW - Single crystal
KW - Strontium aluminate
KW - Thermally stimulated luminescence
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U2 - 10.1016/j.jlumin.2016.04.008
DO - 10.1016/j.jlumin.2016.04.008
M3 - Article
AN - SCOPUS:84964452612
VL - 176
SP - 342
EP - 346
JO - Journal of Luminescence
JF - Journal of Luminescence
SN - 0022-2313
ER -