181 第 45 巻第 3 号　Pr 3+ 添加APLF（20Al （PO 3 ） 3 ‒80LiF）シンチレータの紫外光発光特性の温度特性 The development of scintillator materials for scattered neutrons is essential in studying laser fusion experiments. We have previously investigated and proposed Pr 3+ -doped 20Al(PO 3 ) 3 -80LiF (APLF + Pr) glasses as scintillators for neutron detection. The APLF + Pr glass emissions are then investigated with synchrotron radiation excitation and varying sample temperature. APLF + Pr glasses exhibit luminescence emissions located at 200 to 300 nm and 400 nm attributed to the 4f5d→4f 2 and 4f 2 →4f 2 ( 1 S 0 → 3 P j + 1 I 6 ) transitions, respectively. In addition, the 200 to 300-nm emission is not substantially affected by temperature, while the 400-nm emission intensities increase with decreasing sample temperature. This temperature dependence is attributed to cross relaxation whose effect can be controlled by the Pr-doping concentration. Our results suggest that doping concentration of APLF + Pr must be optimized and that APLF + Pr glasses must operate at low temperatures for better neutron detection. Key Words< Uekpvknncvqt. Pgwvtqp fkcipquvkeu. Kpgtvkcn eqpÞpgogpv hwukqp Pr 3+ 添加APLF（20Al （PO 3 ） 3 ‒80LiF）シンチレータの 紫外光発光特性の温度特性 坪井 瑞輝 1 ，武田 耕平 1 ，中里 智治 1 ，河野 雅弘 1 ，山ノ井 航平 1 ， Marilou Cadatal-RADUBAN 2 ，酒井 浩平 1 ，西 亮祐 1 ，南 佑輝 1 ，Mui Viet LUONG 1 ， 有川 安信 1 ，清水 俊彦 1 ，猿倉 信彦 1 ，乗松 孝好 1 ，中井 光男 1 ，疇地 宏 1 ，村田 貴広 3 ， 藤野 茂 4 ，吉田 英樹 5 ，吉川 彰 6 ，佐藤 仲弘 7 ，菅 博文 7 ，鎌田 圭 8 1 大阪大学 レーザーエネルギー学研究センター（〒565-0871 大阪府吹田市山田丘2-6） 2 Centre for Theoretical Chemistry and Physics, Institute of Natural and Mathematical Sciences, Massey University, Albany, Auckland 0632 3 熊本大学（〒860-8555 熊本県熊本市中央区） 4 九州大学（〒812-8581 福岡県福岡市東区） 5 長崎県窯業技術センター（〒859-3726 長崎県東彼杵郡波佐見町） 6 東北大学 金属材料研究所（〒980-8577 宮城県仙台市青葉区） 7 浜松ホトニクス株式会社（〒430-8587 静岡県浜松市中区） 8 東北大学 未来科学技術共同研究センター（〒980-8579 宮城県仙台市青葉区） Temperature Dependence of the Ultraviolet Luminescence of Pr 3+ -Doped 20Al(PO 3 ) 3 -80LiF Glass Scintillator Mizuki TSUBOI 1 , Kohei TAKEDA 1 , Tomoharu NAKAZATO 1 , Masahiro KONO 1 , Kohei YAMANOI 1 , Marilou Cadatal-RADUBAN 2 , Kohei SAKAI 1 , Ryosuke NISHI 1 , Yuki MINAMI 1 , Mui Viet LUONG 1 , Yasunobu ARIKAWA 1 , Toshihiko SHIMIZU 1 , Nobuhiko SARUKURUA 1 , Takayoshi NORIMATSU 1 , Mitsuo NAKAI 1 , Hiroshi AZECHI 1 , Takahiro MURATA 3 , Shigeru FUJINO 4 , Hideki YOSHIDA 5 , Akira YOSHIKAWA 6 , Nakahiro SATO 7 , Hirofumi KAN 7 , and Kei KAMADA 8 1 Institute of Laser Engineering, Osaka University, 2-6 Suita, Osaka 565-0871 2 Centre for Theoretical Chemistry and Physics, Institute of Natural and Mathematical Sciences, Massey University, Albany, Auckland 0632 3 Kumamoto University, Kumamoto 860-8555 4 Kyushu University, Fukuoka 812-8581 5 Ceramic Research Center of Nagasaki, Hasami, Nagasaki 859-3726 6 Institute for Materials Research, Tohoku University, Sendai 980-8577 7 Hamamatsu Photonics K. K., Hamamatsu 430-8587 8 New Industry Creation Hatchery Center, Tohoku University, Sendai 980-8579 （Received November 28, 2016）