公开(公告)号：US20130105707A1

公开(公告)日：2013-05-02

申请号：US13809460

申请日：2011-07-20

申请人： Hiromitsu Takahashi ,  Mitsuo Yonetani ,  Masayuki Matsuoka ,  Yasushi Fukazawa ,  Noriaki Kawaguchi ,  Kentaro Fukuda ,  Toshihisa Suyama ,  Akira Yoshikawa ,  Takayuki Yanagida ,  Yui Yokota ,  Yutaka Fujimoto

发明人： Hiromitsu Takahashi ,  Mitsuo Yonetani ,  Masayuki Matsuoka ,  Yasushi Fukazawa ,  Noriaki Kawaguchi ,  Kentaro Fukuda ,  Toshihisa Suyama ,  Akira Yoshikawa ,  Takayuki Yanagida ,  Yui Yokota ,  Yutaka Fujimoto

IPC分类号： H01L31/0232

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 polyvinyltoluene as a base material, between a scintillator composed of a fluoride single crystal, such as a Ce-containing LiCaAlF6 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]提供了具有优异的长期操作稳定性并且具有优异的时间分辨率和计数率特性的用于由闪烁体发出的光的光检测器的检测效率提高的放射线检测器 使用具有短荧光寿命的闪烁体。 解决问题的手段放射线检测器是通过将由例如以聚乙烯基甲苯为基础的有机荧光物质构成的光波长转换层安装在由氟化物单晶构成的闪烁体之间， 作为含Ce的LiCaAlF 6晶体，以及具有由透明玻璃材料如硼硅酸盐玻璃构成的光入射窗材料的光电检测器。 在放射线检测器中，由闪烁器发出的光的峰值波长为360nm以下，光转换层转换后的光的峰值波长为400nm以上。 优选地，闪烁体和光波长转换层的折射率均为1.35〜1.65。

公开(公告)号：US20130112885A1

公开(公告)日：2013-05-09

申请号：US13809493

申请日：2011-07-20

申请人： Hiromitsu Takahashi ,  Mitsuo Yonetani ,  Masayuki Matsuoka ,  Yasushi Fukazawa ,  Noriaki Kawaguchi ,  Kentaro Fukuda ,  Toshihisa Suyama ,  Akira Yoshikawa ,  Takayuki Yanagida ,  Yui Yokota ,  Yutaka Fujimoto

发明人： Hiromitsu Takahashi ,  Mitsuo Yonetani ,  Masayuki Matsuoka ,  Yasushi Fukazawa ,  Noriaki Kawaguchi ,  Kentaro Fukuda ,  Toshihisa Suyama ,  Akira Yoshikawa ,  Takayuki Yanagida ,  Yui Yokota ,  Yutaka Fujimoto

IPC分类号： G01T3/06

CPC分类号： C09K11/7734 ,  C30B15/00 ,  C30B29/12 ,  G01T1/2008 ,  G01T3/06 ,  G21K4/00

摘要： [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 LiCaAlF6: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 6Li, 10B and Gd, or an inorganic single crystal scintillator, such as lithium glass (containing 6Li and Ce) or BGO, which has an effective atomic number Zeff of 30 or larger and which does not contain a total amount of 10 mol % or more of elements selected from 6Li, 10B and Gd.

摘要翻译： [待解决的问题]提供了一种可以容易地区分伽马射线和热中子上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探测器。 [解决问题的手段]在具有两个闪烁体并且区分热中子和γ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，其具有大于1500个光子的光产量 /中子，以及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波长的可渗透端。 用于检测γ射线的闪烁体的特征在于：不含总量为10mol％以上的选自6Li，10B和Gd的元素的有机固体闪烁体，例如塑料闪烁体，或无机单晶 诸如具有30或更大的有效原子数Zeff的锂玻璃（含6Li和Ce）或BGO的闪烁体，其不含有选自6Li，10B和Gd的元素的总量的10mol％以上。