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Arimori, Takao; Tamaoki, Haruhiko*; Nakamura, Teruya*; Kamiya, Hiroyuki*; Ikemizu, Shinji*; Takagi, Yasumitsu*; Ishibashi, Toru*; Harashima, Hideyoshi*; Sekiguchi, Mutsuo*; Yamagata, Yuriko*
Nucleic Acids Research, 39(20), p.8972 - 8983, 2011/11
Times Cited Count:24 Percentile:52.13(Biochemistry & Molecular Biology)Arimori, Takao; Tamaoki, Haruhiko*; Nakamura, Teruya*; Kamiya, Hiroyuki*; Ikemizu, Shinji*; Takagi, Yasumitsu*; Ishibashi, Toru*; Harashima, Hideyoshi*; Sekiguchi, Mutsuo*; Yamagata, Yuriko*
no journal, ,
no abstracts in English
Tsubota, Yoichi; Waki, Takaaki*; Kaneko, Junichi*; Higuchi, Mikio*; Ishibashi, Hiroyuki*
no journal, ,
GdSiO:Ce (GPS) is a rare-earth oxide scintillator with large light yield (LY) exceed NaI:Tl and can be used under high temp. environment. The triclinic La-GPS, which substituted Gd site for La, also have LY close to NaI:Tl. Although several trials on growth of La-GPS were reported, systematic research on LY were not sufficiently carried out. In this report, the optimization of La and Ce concentration of La-GPS was conducted to maximize LY. Sintered (LaxGd1-x-yCey)SiO (x= 0.1, y= 0 - 0.16) and (x= 0 - 0.15, y= 0.025) were fixed on glass plates and mechanically polished to be approx. 100 micro-meter thick. For the evaluation of scintillation LY, alpha-particle response measurement using Am was performed. For the Ce= 2.5% samples, La-GPS with 5 - 6.7% of La showed the highest LY. LY was then decreased as the La increased. For the La=10% samples, light yield increased as Ce increased in the range of Ce=0.5-2.5% that corresponded with the increase of luminescent center of Ce. Decrease of LY due to concentration quenching was observed in the range of Ce4%.
井崎 賢二; 森下 祐樹; 山崎 巧
金子 純一*; 樋口 幹雄*; 坪田 陽一*; 山本 誠一*; 石橋 浩之*
【課題】環境中に管理対象放射性物質とそれ以外の放射性物質が混在する場合であっても、管理対象放射性物質に起因する放射能汚染を短時間に計測して評価する放射線計測方法を提供する。 【解決手段】測定試料に付着している放射性物質に感応して検出信号を発生する多数の検出ピクセルを平面状に並べて放射線検出面を構成した放射線検出器の多数の検出ピクセルから出力される検出信号を、放射線検出面を複数の領域に分割して各分割領域に該当する検出ピクセルから出力される検出信号を検出処理し、分割領域毎に検出される放射線検出結果を出力する信号処理装置を用いて測定試料中の放射性物質の放射線量を計測する。