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    RADIATION DETECTOR
    2.
    发明公开
    RADIATION DETECTOR 审中-公开
    辐射探测器

    公开(公告)号：EP2597489A1

    公开(公告)日：2013-05-29

    申请号：EP11809675.9

    申请日：2011-07-20

    申请人： Hiroshima University ,  Tokuyama Corporation ,  Tohoku University

    发明人： TAKAHASHI, Hiromitsu ,  YONETANI, Mitsuo ,  MATSUOKA, Masayuki ,  FUKAZAWA, Yasushi ,  KAWAGUCHI, Noriaki ,  FUKUDA, Kentaro ,  SUYAMA, Toshihisa ,  YOSHIKAWA, Akira ,  YANAGIDA, Takayuki ,  YOKOTA, Yui ,  FUJIMOTO, Yutaka

    IPC分类号： G01T1/20 ,  C09K11/00 ,  G01T1/202 ,  C09K11/06 ,  C09K11/80

    CPC分类号： H01L31/02322 ,  C09K11/06 ,  C09K11/7734 ,  C30B15/00 ,  C30B15/08 ,  C30B29/12 ,  G01T1/2018

    摘要： [Problems to be Solved] A radiation detector, which is improved in the detection efficiency of a photodetector for light emitted by a scintillator, which has excellent long-term operational stability, and which is excellent in time resolution and count rate characteristics, is provided with the use of the scintillator with a short fluorescence lifetime.
    [Means to Solve the Problems] A radiation detector is constructed by installing an optical wavelength conversion layer, which is composed of, for example, an organic fluorescent substance using polyvinyl toluene as a base material, between a scintillator composed of a fluoride single crystal, such as a Ce-containing LiCaAlF 6 crystal, and a photodetector having a light entrance window material composed of a transparent glass material such as borosilicate glass. In the radiation detector, the peak wavelength of light emitted by the scintillator is 360 nm or less, and the peak wavelength of light after conversion by the optical conversion layer is 400 nm or more. Preferably, the refractive indexes of the scintillator and the optical wavelength conversion layer are both 1.35 to 1.65.

    摘要翻译： [待解决的问题]提供一种辐射探测器，其具有改进的用于由闪烁体发射的光的探测效率，其具有优异的长期操作稳定性，并且具有时间分辨率和计数率特性优异的辐射探测器 使用荧光寿命短的闪烁体。 解决问题的手段辐射检测器通过在由氟化物单晶构成的闪烁体之间安装光波长转换层而构成，所述光波长转换层例如由聚乙烯甲苯作为基材的有机荧光物质构成， 如含Ce的LiCaAlF 6晶体，以及具有由硼硅酸盐玻璃等透明玻璃材料构成的光入射窗材料的光检测器。 在放射线检测器中，由闪烁体发出的光的峰值波长为360nm或更小，并且由光学转换层转换后的光的峰值波长为400nm或更大。 优选地，闪烁体和光学波长转换层的折射率均为1.35至1.65。

    SCINTILLATOR
    3.
    发明公开
    SCINTILLATOR 审中-公开
    SZINTILLATOR

    公开(公告)号：EP2439252A1

    公开(公告)日：2012-04-11

    申请号：EP10783368.3

    申请日：2010-06-01

    申请人： Tokuyama Corporation ,  Tohoku University

    发明人： FUKUDA, Kentaro ,  ISHIZU, Sumito ,  KAWAGUCHI, Noriaki ,  SUYAMA, Toshihisa ,  YOSHIKAWA, Akira ,  YANAGIDA, Takayuki ,  YOKOTA, Yui

    IPC分类号： C09K11/85 ,  C09K11/00 ,  G01T1/20

    CPC分类号： G21K4/00 ,  C09K11/7773 ,  C30B15/08 ,  C30B29/12 ,  G21K2004/06

    摘要： [Problems to be Solved] The present invention aims to provide a scintillator which can detect photons of high energy, such as hard X-rays or γ-rays, with high sensitivity.
    [Means to Solve the Problems] A scintillator comprises lithium lutetium fluoride containing neodymiumas a luminescence center, the lithium lutetium fluoride being represented by the chemical formula LiLu 1-x Nd x F 4 where x is in the range of 0.00001 to 0.2, preferably, 0.0001 to 0.05. Preferably, the scintillator comprises a single crystal of the lithium lutetium fluoride containing neodymium.

    摘要翻译： [待解决的问题]本发明的目的在于提供一种可以高灵敏度地检测诸如硬X射线或³射线的高能量的光子的闪烁体。 [解决问题的方法]闪烁体包含含有发光中心的钕的氟化锂镥，氟化锂锂由化学式LiLu 1-x Nd x F 4表示，其中x在0.00001至0.2的范围内， 0.0001〜0.05。 优选地，闪烁体包括含有钕的氟化锂镥的单晶。

    ULTRAVIOLET LIGHT RECEIVING ELEMENT AND METHOD FOR MEASURING AMOUNT OF ULTRAVIOLET LIGHT
    4.
    发明公开
    ULTRAVIOLET LIGHT RECEIVING ELEMENT AND METHOD FOR MEASURING AMOUNT OF ULTRAVIOLET LIGHT 审中-公开
    紫外线接收元件和测量紫外线量的方法

    公开(公告)号：EP2312644A1

    公开(公告)日：2011-04-20

    申请号：EP09802990.3

    申请日：2009-07-29

    申请人： National University Corporation Nagoya Institute of Technology ,  Tokuyama Corporation

    发明人： ONO, Shingo ,  KAWAGUCHI, Noriaki ,  FUKUDA, Kentaro ,  SUYAMA, Toshihisa

    IPC分类号： H01L31/0264 ,  G01J1/02

    CPC分类号： H01L31/09 ,  G01J1/429 ,  H01L31/032

    摘要： [Problems to be Solved] To provide a novel ultraviolet light receiving element which is selectively sensitive to ultraviolet radiation, and a method for measuring the dose of ultraviolet radiation using the ultraviolet light receiving element. [Means to Solve the Problems] An ultraviolet detecting layer composed of a thin film of a metal fluoride, such as cerium fluoride, lithium fluoride, magnesium fluoride or calcium fluoride, is formed on a substrate of silica glass, sapphire or the like. Further, at least a pair of an anode and a cathode are formed on the ultraviolet detecting layer to prepare an ultraviolet light receiving element. This ultraviolet light receiving element changes in electric resistivity in accordance with the dose of incident ultraviolet radiation. Thus, the dose of ultraviolet radiation can be measured by taking out and measuring the change as an electric signal.

    摘要翻译： 为了提供对紫外线有选择性地敏感的新型紫外线受光元件以及使用该紫外线受光元件来测定紫外线的照射量的方法。 解决问题的手段在石英玻璃，蓝宝石等的基板上形成由氟化铈，氟化锂，氟化镁或氟化钙等金属氟化物薄膜构成的紫外线检测层。 此外，在紫外检测层上形成至少一对阳极和阴极以制备紫外光接收元件。 该紫外光接收元件根据入射的紫外线辐射的剂量改变电阻率。 因此，可以通过取出并测量作为电信号的变化来测量紫外辐射剂量。

    PRETREATED METAL FLUORIDES AND PROCESS FOR PRODUCTION OF FLUORIDE CRYSTALS
    5.
    发明公开
    PRETREATED METAL FLUORIDES AND PROCESS FOR PRODUCTION OF FLUORIDE CRYSTALS 审中-公开
    VORBEHANDELTE METALLFLUORIDE UND VERFAHREN ZUR HERSTELLUNG VON FLUORIDKRISTALLEN

    公开(公告)号：EP2292555A1

    公开(公告)日：2011-03-09

    申请号：EP09746679.1

    申请日：2009-05-15

    申请人： Tokuyama Corporation ,  National Institute of Advanced Industrial Science and Technology

    发明人： ISHIZU, Sumito ,  SEKIYA, Akira ,  FUKUDA, Kentaro ,  SUYAMA, Toshihisa

    IPC分类号： C01B9/08 ,  C30B15/00 ,  C30B15/08 ,  C30B29/12 ,  G02B1/02

    CPC分类号： C01B9/08 ,  C01F17/0031 ,  C01G1/06 ,  C01P2002/84 ,  C01P2002/85 ,  C01P2004/04 ,  C01P2006/80 ,  C30B15/00 ,  C30B15/08 ,  C30B29/12 ,  C30B35/007

    摘要： [Problem] To provide a method of producing a pretreated metal fluoride containing impurities such as oxygen in decreased amounts and a fluoride crystal containing impurities such as oxygen in decreased amounts and having excellent optical properties such as transparency.
    [Means for Solution] A metal fluoride is heated in a temperature range of not lower than 300° K but not higher than 1780° K in the co-presence of a carbonyl fluoride of an amount of not less than 1/100 mol per mol of the metal fluoride to thereby obtain a pretreated metal fluoride while removing oxygen and water from the starting metal fluoride and from the interior of the production furnace. Further, the pretreated metal fluoride as a starting material is heated and melted, and a fluoride crystal of a high quality is obtained from the obtained melt by a crystal growing method such as a melt pull-up method or a melt pull-down method.

    摘要翻译： 本发明提供以减少的量生产含有氧等杂质的预处理金属氟化物的方法和含有少量杂质的氟化物结晶，并具有良好的透光性等光学性能。 [解决方案]金属氟化物在不低于300°K但不高于1780°K的温度范围内，在不少于1/100摩尔/摩尔量的碳酰氟的共存下加热 的金属氟化物，从而从起始金属氟化物和生产炉内部除去氧和水，从而获得预处理的金属氟化物。 此外，将作为起始原料的预处理金属氟化物加热熔融，通过熔融拉拔法或熔融拉拔法等晶体生长法从得到的熔液中得到高品质的氟化物结晶。

    NEUTRON SCINTILLATOR AND NEUTRON DETECTOR
    6.
    发明授权
    NEUTRON SCINTILLATOR AND NEUTRON DETECTOR 有权

    公开(公告)号：EP3040739B1

    公开(公告)日：2018-07-18

    申请号：EP14840072.4

    申请日：2014-08-28

    申请人： Tokuyama Corporation

    发明人： FUKUDA, Kentaro ,  ISHIZU, Sumito ,  SAITO, Hiroaki

    IPC分类号： G01T3/06 ,  C09K11/64 ,  G21K4/00 ,  C09K11/02

    CPC分类号： G01T3/06 ,  C09K11/02 ,  C09K11/7733 ,  G21K4/00

    摘要： [Object] To provide a neutron scintillator that is constituted of a resin composition including inorganic fluorescent substance particles and has an excellent neutron/³ ray discrimination ability even when an optical transparency of the resin composition is poor due to a discrepancy of refractive indices and the like and fluorescence due to neutrons cannot be taken out sufficiently. [Solving Means] In a neutron scintillator constituted of a resin composition including a resin and inorganic fluorescent substance particles that include at least one type of neutron capture isotope selected from lithium-6 and boron-10, such as Eu: LiCaAlF6, the resin composition additionally includes a neutron-insensitive fluorescent substance having a different fluorescence property. Neutrons and ³ rays can be discriminated using a difference in the fluorescence property such as a fluorescence lifetime and an emission wavelength between the case where neutrons enter and the case where ³ rays enter.

    SCINTILLATOR FOR NEUTRONS AND NEUTRON DETECTOR
    9.
    发明公开
    SCINTILLATOR FOR NEUTRONS AND NEUTRON DETECTOR 有权
    新疆维吾尔自治区中东地区

    公开(公告)号：EP2565682A1

    公开(公告)日：2013-03-06

    申请号：EP11775005.9

    申请日：2011-04-26

    申请人： Tokuyama Corporation ,  Tohoku University

    发明人： FUKUDA, Kentaro ,  ISHIZU, Sumito ,  KAWAGUCHI, Noriaki ,  SUYAMA, Toshihisa ,  YOSHIKAWA, Akira ,  YANAGIDA, Takayuki ,  YOKOTA, Yui

    IPC分类号： G01T3/06 ,  C09K11/00 ,  C09K11/61

    CPC分类号： G01T3/06 ,  C09K11/7733 ,  G21K4/00

    摘要： [Problems to be Solved] A neutron scintillator excellent in neutron detection efficiency and n/γ discrimination ability, and a neutron detector using the neutron scintillator are provided.
    [Means to Solve the Problems] A neutron scintillator comprising a eutectic body composed of laminar lithium fluoride crystals and laminar calcium fluoride crystals alternately arranged in layers, the thickness of the lithium fluoride crystal layers in the eutectic body being 0.1 to 5 µm; or a neutron scintillator comprising a eutectic body composed of laminar lithium fluoride crystals and laminar calcium fluoride crystals alternately arranged in layers, the calcium fluoride crystal layers in the eutectic body being linearly continuous in at least one direction; and a neutron detector basically constructed from any of the neutron scintillators and a photodetector.

    摘要翻译： [待解决的问题]提供了优异的中子检测效率和n /³辨别能力的中子闪烁体以及使用中子闪烁体的中子检测器。 解决问题的手段一种中子闪烁体，其包含由层状氟化锂晶体和层状氟化钙晶体构成的共晶体，层状交替排列，共晶体中的氟化锂晶体层的厚度为0.1〜5μm; 或包含交替排列成层状氟化锂晶体和层状氟化钙晶体的共晶体的中子闪烁体，所述共晶体中的氟化钙晶体层在至少一个方向上呈线性连续; 以及基本由中子闪烁体和光电检测器构成的中子检测器。

    CAKE OF EASILY DISPERSIBLE PRECIPITATED SILICA AND PROCESS FOR PRODUCING THE SAME
    10.
    发明公开
    CAKE OF EASILY DISPERSIBLE PRECIPITATED SILICA AND PROCESS FOR PRODUCING THE SAME 审中-公开
    BLOCK由二氧化硅易拆卸降水及其制造方法

    公开(公告)号：EP1577263A1

    公开(公告)日：2005-09-21

    申请号：EP03741198.0

    申请日：2003-07-04

    申请人： TOKUYAMA CORPORATION

    发明人： HAYASHI, Hirokatsu ,  FUKUNAGA, Kenji ,  FUKUDA, Kentaro

    IPC分类号： C01B33/12 ,  C01B33/143 ,  B41M5/00 ,  B41J2/01

    CPC分类号： C01B33/143 ,  B41M5/5218 ,  B41M5/5245 ,  C01P2004/50 ,  C01P2004/62 ,  C01P2004/80 ,  C01P2006/12

    摘要： A silica cake formed of easily dispersible precipitated silica having small primary particle size is provided, from which highly transparent silica dispersion can be effectively obtained. This silica cake is characterized by being a cake of precipitated silica having BET specific surface area of at least 220 m 2 /g, and when it is dispersed in ion-exchange water to provide an aqueous dispersion of the silica of 5% by weight in concentration and further diluted to reduce the silica concentration to 1.5% by weight, the dispersion having a light-scattering index (n-value) of at least 2. This silica cake can be obtained by simultaneously adding an alkali silicate and a mineral acid to a reaction liquid whose pH is being maintained at a fixed value within a range of 7.5 - 11.5 and whose temperature is being maintained at not lower than 90°C, whereby forming precipitated silica through their reaction, and separating said precipitated silica from the reaction liquid in wet state.