发明名称 Fluorescent substances, their preparation and use in radiation detectors.
摘要 <p>A fluorescent substance is comprised of a praseodymium- activated yttrium and/or rare earth oxysulfide represented by the chemical formula, R2(1-x)Pr2xO2S, wherein R stands for at least one member selected from the group consisting of Y, Gd, La, and Lu and x for a numerical value satisfying the expression, 5 x 10<-><5> </= x </= 1 x 10<-><2>, and the substance having a linear absorption coefficient of not more than 6.0 cm<-><1> at 550 nm. Preferably the fluorescent substance contains PO4 in an amount of not more than 100 ppm. Substances of improved luminous emission intensity can be produced for use in radiation detectors and in X-ray CT apparatus. <IMAGE></p>
申请公布号 EP0659864(A1) 申请公布日期 1995.06.28
申请号 EP19940309507 申请日期 1994.12.19
申请人 KABUSHIKI KAISHA TOSHIBA 发明人 YOKOTA, KAZUTO, C/O INTELLECTUEL PROPERTY DIV.;FUKUTA, YUKIHIRO, C/O INTELLECTUEL PROPERTY DIV.
分类号 G01T1/202;C09K11/08;C09K11/77;C09K11/84;G21K4/00;(IPC1-7):C09K11/84 主分类号 G01T1/202
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