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    • 3. 发明公开
    • DEVICE FOR EMITTING VACUUM ULTRAVIOLET LIGHT
    • VORRICHTUNG ZUR EMISSION VON VAKUUM-ULTRAVIOLETT-LICHT
    • EP2477210A1
    • 2012-07-18
    • EP10813827.2
    • 2010-09-06
    • National University Corporation Nagoya Institute of TechnologyTokuyama CorporationTohoku University
    • ONO, ShingoSUYAMA, ToshihisaFUKUDA, KentaroISHIZU, SumitoKAWAGUCHI, NoriakiNAGAMI, TomohitoYOSHIKAWA, AkiraYANAGIDA, TakayukiYOKOTA, Yui
    • H01J63/06H01J61/44
    • H05B33/14C09K11/7773H01J29/20H01J63/06H05B33/145
    • [Problems to be Solved] The present invention aims to provide a novel light emitting device for ultraviolet light, in particular for vacuum ultraviolet light, which has rectified the drawbacks of the ultraviolet light emitting apparatus in current use, namely, the problems that the apparatus is large in size, consumes high power, is short in life, and has unstable strength.
      [Means to Solve the Problems] A vacuum ultraviolet light emitting device comprising: a luminescence substrate which is composed of a transparent substrate of lithium fluoride, magnesium fluoride, calcium fluoride, barium fluoride or the like, and a metal fluoride thin-film layer formed on the transparent substrate and being a thin-film layer of a metal fluoride such as LuLiF 4 , LaF 3 , BaF 2 or CaF 2 , the metal fluoride being doped with atoms of neodymium (Nd), thulium (Tm), erbium (Er) or the like; and an electron beam source such as a thermionic emission gun or a field emission gun, wherein the luminescence substrate and the electron beam source are disposed in a vacuum atmosphere, and the metal fluoride thin-film layer is irradiated with electron beams from the electron beam source to emit light including wavelength components of vacuum ultraviolet light.
    • [待解决的问题]本发明的目的在于提供一种用于紫外光的新颖的发光装置,特别是用于真空紫外光的发光装置,其已经整流了目前使用的紫外线发射装置的缺点,即装置 体积大,功耗大,寿命短,强度不稳定。 解决问题的手段一种真空紫外线发光装置,其特征在于,包括:由氟化锂,氟化镁,氟化钙,氟化钡等的透明基板和形成的金属氟化物薄膜层构成的发光基板 在透明基板上,并且是诸如LuLiF 4,LaF 3,BaF 2或CaF 2的金属氟化物的薄膜层,金属氟化物掺杂有钕(Nd),ium(Tm),铒(Er )等; 以及诸如热电子发射枪或场发射枪的电子束源,其中发光基板和电子束源设置在真空气氛中,并且金属氟化物薄膜层被来自电子束的电子束照射 源发射包括真空紫外光的波长分量的光。
    • 8. 发明公开
    • PHOSWICH THERMAL NEUTRON DETECTOR
    • PHOSWICH-WÄRMENEUTRONENDETEKTOR
    • EP2597490A1
    • 2013-05-29
    • EP11809676.7
    • 2011-07-20
    • Hiroshima UniversityTokuyama CorporationTohoku University
    • TAKAHASHI, HiromitsuYONETANI, MitsuoMATSUOKA, MasayukiFUKAZAWA, YasushiKAWAGUCHI, NoriakiFUKUDA, KentaroSUYAMA, ToshihisaYOSHIKAWA, AkiraYANAGIDA, TakayukiYOKOTA, YuiFUJIMOTO, Yutaka
    • G01T3/06C09K11/00C09K11/64G01T1/202
    • C09K11/7734C30B15/00C30B29/12G01T1/2008G01T3/06G21K4/00
    • [Problems to be Solved] A phoswich radiation detector, which can easily discriminate between detection signals on gamma rays and thermal neutrons, and which can selectively acquire signals on thermal neutrons, is provided.
      [Means to Solve the Problems] In a phoswich radiation detector having two scintillators and discriminating between thermal neutrons and gamma rays, the detector comprises a scintillator for detecting thermal neutrons, such as LiCaAlF 6 :Eu, which has a light yield of more than 1500 photons/neutron, and a scintillator for detecting gamma rays, which has a permeable end on a shorter wavelength than the light emission wavelength of the thermal neutron scintillator. The scintillator for detecting gamma rays is characterized by being either an organic solid scintillator, such as a plastic scintillator, which does not contain a total amount of 10 mol% or more of elements selected from 6 Li, 10 B and Gd, or an inorganic single crystal scintillator, such as lithium glass (containing 6 Li and Ce) or BGO, which has an effective atomic number Z eff of 30 or larger and which does not contain a total amount of 10 mol% or more of elements selected from 6 Li, 10 B and Gd.
    • [待解决的问题]提供了一种能够容易地区分伽马射线和热中子的检测信号并且可以选择性地获取热中子信号的棱镜辐射检测器。 [解决问题的手段]在具有两个闪烁体并且识别热中子和伽马射线的双射线辐射检测器中,检测器包括用于检测热中子的闪烁体,例如LiCaAlF 6:Eu,其光产量大于1500 光子/中子和用于检测伽马射线的闪烁体,其具有比热中子闪烁体的发光波长更短的波长的可渗透端。 用于检测γ射线的闪烁体的特征在于是有机固体闪烁体,例如塑料闪烁体,其不含总量为10mol%或更多的选自6Li,10B和Gd的元素,或无机物 单晶闪烁体,如具有30或更大的有效原子数Z eff的锂玻璃(含6 Li和Ce)或BGO,不含总量为10mol%以上的元素,选自6Li ,10 B和Gd。
    • 9. 发明公开
    • RADIOGRAPHIC IMAGE DETECTOR
    • RÖNTGENBILDDETEKTOR
    • EP2416176A1
    • 2012-02-08
    • EP10758456.7
    • 2010-03-19
    • Tokuyama CorporationTohoku UniversityKyoto UniversityThe University of Tokyo
    • FUKUDA, KentaroISHIZU, SumitoKAWAGUCHI, NoriakiSUYAMA, ToshihisaYOSHIKAWA, AkiraYANAGIDA, TakayukiYOKOTA, YuiKUBO, HidetoshiTANIMORI, ToruSEKIYA, Hiroyuki
    • G01T1/18G01T1/20H01J31/50
    • G01T1/28H01J31/49H01J47/02
    • [Problems to be Solved] It is an object of the present invention to provide a novel radiographic image detector which can detect radiation, such as hard X-rays or γ-rays, with high sensitivity and which is excellent in position resolution and count rate characteristic.
      [Means to Solve the Problems] A radiographic image detector comprises a combination of a scintillator, such as a lanthanum fluoride crystal containing neodymium, for converting incident radiation into ultraviolet rays; and a gas multiplication ultraviolet image detector for converting ultraviolet rays into electrons, amplifying such electrons by use of a gas electron avalanche phenomenon, and detecting the electrons. The radiographic image detector is characterized in that the gas multiplication ultraviolet image detector is basically constituted by a photoelectric conversion substance, such as cesium iodide or cesium telluride, for converting ultraviolet rays into electrons; a gas electron multiplier for amplifying electrons by use of the gas electron avalanche phenomenon; and a pixel electrode having an amplification function and a detection function.
    • [待解决的问题]本发明的目的是提供一种能够以高灵敏度检测诸如硬X射线或³射线等辐射的新型放射线图像检测器,其位置分辨率和计数率优异 特性。 解决问题的手段放射线图像检测器包括闪烁体,例如含有钕的氟化镧晶体,用于将入射辐射转换为紫外线的组合; 以及用于将紫外线转换成电子的气体倍增紫外线图像检测器,利用气体电子雪崩现象来放大这些电子,并检测电子。 射线照相图像检测器的特征在于,气相色谱紫外图像检测器基本上由诸如碘化铯或碲化铯的光电转换物质构成,用于将紫外线转换成电子; 用于通过使用气体电子雪崩现象来放大电子的气体电子倍增器; 以及具有放大功能和检测功能的像素电极。