TY - JOUR
T1 - Luminescent properties of Cr-doped (GdX, Y1 -X)3Al5O12 infra-red scintillator crystals
AU - Suzuki, Akira
AU - Kurosawa, Shunsuke
AU - Yamaji, Akihiro
AU - Shoji, Yasuhiro
AU - Pejchal, Jan
AU - Kamada, Kei
AU - Yokota, Yuui
AU - Yoshikawa, Akira
N1 - Funding Information:
This work is partially supported by (i) Japan Society for the Promotion of Science (JSPS), Research Fellowships for Young Scientists (S. Kurosawa), (ii) the funding program for next generation world-leading researchers , JSPS, (iii) Development of Systems and Technology for Advanced Measurement and Analysis , Japan Science and Technology Agency (JST), (iv) Adaptable & Seamless Technology Transfer Program through Target-driven R&D (A-STEP), JST, (v) the Association for the Progress of New Chemical Technology , (vi) The Murata Science Foundation , (vii) Nippon Sheet Glass Foundation for Materials Science and Engineering and (viii) the General Sekiyu R&D .
PY - 2014/10
Y1 - 2014/10
N2 - Cr-doped (GdX Y1-X) 3Al5O12 (X = 0, 0.25, 0.50) crystals prepared by the micro-pulling down method were investigated to develop a infra-red scintillator for implantable patient dosimeter in radiation therapy. In order to evaluate their optical and scintillation performance, the following properties were measured: (i) transmittance between ultra-violet and near-infra red region, (ii) photoluminescence spectra under Xe-lamp excitation, and (iii) X-ray excited radio-luminescence spectra. Cr:Y3Al5O12 and Cr:(Gd0.25 Y0.75)3Al5O 12 crystals showed increased transmittance of 80%, while Cr:(Gd 0.50 Y0.50)3Al5O12 had a lower transmittance of 40% due to its polycrystalline structure. In addition, all the Cr:(GdX Y1-X)3Al 5O12 crystals showed sharp scintillation luminescence peaks ascribed to Cr3+ d-d transitions. Therefore, these results suggested that Cr:Y3Al5O12 and Cr:(Gd 0.25 Y0.75)3Al5O12 crystals can be candidate materials for the dosimeter use.
AB - Cr-doped (GdX Y1-X) 3Al5O12 (X = 0, 0.25, 0.50) crystals prepared by the micro-pulling down method were investigated to develop a infra-red scintillator for implantable patient dosimeter in radiation therapy. In order to evaluate their optical and scintillation performance, the following properties were measured: (i) transmittance between ultra-violet and near-infra red region, (ii) photoluminescence spectra under Xe-lamp excitation, and (iii) X-ray excited radio-luminescence spectra. Cr:Y3Al5O12 and Cr:(Gd0.25 Y0.75)3Al5O 12 crystals showed increased transmittance of 80%, while Cr:(Gd 0.50 Y0.50)3Al5O12 had a lower transmittance of 40% due to its polycrystalline structure. In addition, all the Cr:(GdX Y1-X)3Al 5O12 crystals showed sharp scintillation luminescence peaks ascribed to Cr3+ d-d transitions. Therefore, these results suggested that Cr:Y3Al5O12 and Cr:(Gd 0.25 Y0.75)3Al5O12 crystals can be candidate materials for the dosimeter use.
KW - Bulk crystal
KW - Cr-doped oxide garnet
KW - Infra-red scintillator
KW - Patient dosimetry
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U2 - 10.1016/j.optmat.2014.04.002
DO - 10.1016/j.optmat.2014.04.002
M3 - Article
AN - SCOPUS:84899662641
SN - 0925-3467
VL - 36
SP - 1938
EP - 1941
JO - Optical Materials
JF - Optical Materials
IS - 12
ER -