TY - JOUR
T1 - Ce and Eu-doped LiSrAlF6 scintillators for neutron detectors
AU - Yanagida, Takayuki
AU - Kawaguchi, Noriaki
AU - Fujimoto, Yutaka
AU - Yokota, Yuui
AU - Yamazaki, Atsushi
AU - Watanabe, Kenichi
AU - Kamada, Kei
AU - Yoshikawa, Akira
AU - Chani, Valery
N1 - Funding Information:
This work was mainly supported by JST Sentan and partially by a Grant in Aid for Young Scientists (B)-15686001 and (A)-23686135 from the Ministry of Education, Culture, Sports, Science and Technology of the Japanese government (MEXT) . Partial assistance from the Yazaki Memorial Foundation for Science and Technology, Japan Science Society, Sumitomo Foundation, and Iketani Science and Technology Foundation are also gratefully acknowledged.
PY - 2011/12
Y1 - 2011/12
N2 - Ce 1%, Eu 1%, and Eu 2%-doped LiSrAlF6 (LiSAF) single crystals were grown by the micro-pulling-down method for thermal neutron applications. The crystals were transparent, 2.0 mm in diameter and 20-40 mm in length. Neither visible inclusions nor cracks were observed. Their transmittance spectra were measured. The strong absorption lines were observed at 200, 240, and 300 nm for Ce:LiSAF due to Ce3+ 4f-5d transition. In Eu:LiSAF, 200 (4f-5d) and 300 (4f-4f) nm absorption lines were detected. The samples demonstrated strong emission peaks at 300 nm (Ce:LiSAF) and 370 nm (Eu:LiSAFs) when they were irradiated with 241Am α-rays simulating the α-particles from the 6Li(n, α) reaction. Thermal neutron responses were examined under 252Cf irradiation. The absolute light yield of Ce, Eu 1%, and Eu 2% crystals were 3400, 18000, and 30000 ph/n, respectively. Main components of the scintillation decay time of Ce, Eu 1%, and Eu 2%-doped LiSAFs were 63, 1293, and 1205 ns.
AB - Ce 1%, Eu 1%, and Eu 2%-doped LiSrAlF6 (LiSAF) single crystals were grown by the micro-pulling-down method for thermal neutron applications. The crystals were transparent, 2.0 mm in diameter and 20-40 mm in length. Neither visible inclusions nor cracks were observed. Their transmittance spectra were measured. The strong absorption lines were observed at 200, 240, and 300 nm for Ce:LiSAF due to Ce3+ 4f-5d transition. In Eu:LiSAF, 200 (4f-5d) and 300 (4f-4f) nm absorption lines were detected. The samples demonstrated strong emission peaks at 300 nm (Ce:LiSAF) and 370 nm (Eu:LiSAFs) when they were irradiated with 241Am α-rays simulating the α-particles from the 6Li(n, α) reaction. Thermal neutron responses were examined under 252Cf irradiation. The absolute light yield of Ce, Eu 1%, and Eu 2% crystals were 3400, 18000, and 30000 ph/n, respectively. Main components of the scintillation decay time of Ce, Eu 1%, and Eu 2%-doped LiSAFs were 63, 1293, and 1205 ns.
KW - LiSrAlF
KW - Neutron
KW - Scintillation detector
KW - Scintillation yield
KW - Single crystal
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U2 - 10.1016/j.radmeas.2011.04.034
DO - 10.1016/j.radmeas.2011.04.034
M3 - Article
AN - SCOPUS:82355168863
SN - 1350-4487
VL - 46
SP - 1708
EP - 1711
JO - Radiation Measurements
JF - Radiation Measurements
IS - 12
ER -