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    RARE EARTH SULFATE PHOSPHOR AND X-RAY DETECTOR USING THE SAME
    2.
    发明公开
    RARE EARTH SULFATE PHOSPHOR AND X-RAY DETECTOR USING THE SAME 失效
    激素释放激素受体损伤

    公开(公告)号：EP0908503A1

    公开(公告)日：1999-04-14

    申请号：EP97928449.4

    申请日：1997-06-20

    申请人： KASEI OPTONIX, LTD.

    发明人： AKIWA, Takeshi ,  AOKI, Yuji ,  SHIMIZU, Etsuo ,  SUZUKI, Hideo

    IPC分类号： C09K11/84 ,  G01T1/20

    CPC分类号： G21K4/00 ,  C09K11/7771 ,  G21K1/06

    摘要： When each of a rare earth oxysulfide phosphor represented by the composition formula ( ) of Ln 2 O 2 S : xRe, yM wherein Ln represents at least one rare earth element selected from Y, La and Gd; Re represents at least one rare earth element selected from Pr and Tb; M represents at least one element selected from Nb, Ta and Mn; and x and y are numbers which satisfy the conditions of 1 × 10 -4 ≦ x ≦ 0.2 and 0.01ppm ≦ y ≦ 1000ppm, respectively, and a rare earth oxysulfide phosphor represented by the composition formula ( ) of (Gd 1-x-y-z ,Pr x ,Sc y ,Ce z ) 2 O 2 S wherein x, y and z are numbers which satisfy the conditions of 10 -4 ≦ x ≦ 2 × 10 -1 , 10 -4 ≦ y ≦ 10 -1 and 0 ≦ z ≦ 10 -6 , respectively is excited by radiation, each of them emits a scintillation at high efficiency, and decreases the afterglow. Each of the phosphors is used for an X-ray detector as a scintillator, and is useful for an X-ray CT apparatus.

    摘要翻译： 当由Ln 2 O 2 S的组成式（@）表示的稀土氧硫化物荧光体：xRe，yM，其中Ln表示选自Y，La和Gd中的至少一种稀土元素; Re表示选自Pr和Tb中的至少一种稀土元素; M表示选自Nb，Ta和Mn中的至少一种元素; 并且x和y分别为满足1×10 -4