JP2007145902A5 - - Google Patents

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JP2007145902A5
JP2007145902A5 JP2005339010A JP2005339010A JP2007145902A5 JP 2007145902 A5 JP2007145902 A5 JP 2007145902A5 JP 2005339010 A JP2005339010 A JP 2005339010A JP 2005339010 A JP2005339010 A JP 2005339010A JP 2007145902 A5 JP2007145902 A5 JP 2007145902A5
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Prior art keywords
phosphor
oxide
radiation
radiation detector
oxide phosphor
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JP2005339010A
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JP4906322B2 (en
JP2007145902A (en
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Ceを発光元素とし、少なくともGd、Al、Ga、Oを含んだ、主にガーネット構造の母体結晶からなる酸化物蛍光体であって、Naを含有することを特徴とする酸化物蛍光体。   An oxide phosphor comprising a base crystal having a garnet structure mainly containing Ce as a light-emitting element and containing at least Gd, Al, Ga, and O, and containing Na. 請求項１に記載の酸化物蛍光体であって、Naを５wtppm以上含有することを特徴とする酸化物蛍光体。   2. The oxide phosphor according to claim 1, wherein the oxide phosphor contains 5 wtppm or more of Na. 請求項１又は２に記載の酸化物蛍光体であって、Naを500wtppm以下含有することを特徴とする酸化物蛍光体。   3. The oxide phosphor according to claim 1, wherein the phosphor contains Na in an amount of 500 wtppm or less. Ceを発光元素とし、少なくともGd、Al、Ga、Oを含んだ、主にガーネット構造の母体結晶からなる酸化物蛍光体を製造する方法であって、原料粉末を混合し、仮焼きする工程と、仮焼き粉末を焼結工程とを含み、前記原料粉末または仮焼き粉末にNa化合物を添加することを特徴とする酸化物蛍光体の製造方法。   A method for producing an oxide phosphor mainly composed of a matrix crystal of a garnet structure containing Ce as a light emitting element and containing at least Gd, Al, Ga, O, and mixing and calcining raw material powders, A method for producing an oxide phosphor comprising: sintering a calcined powder and adding a Na compound to the raw material powder or calcined powder. 請求項４記載の酸化物蛍光体の製造方法であって、前記Na化合物は、Na2Ba4O7、NaCl、NaBr及びNa2CO3からなる群から選ばれる１種又は２種以上の化合物であることを特徴とする酸化物蛍光体の製造方法。 5. The method for producing an oxide phosphor according to claim 4, wherein the Na compound is one or more compounds selected from the group consisting of Na 2 Ba 4 O 7 , NaCl, NaBr, and Na 2 CO 3 . A method for producing an oxide phosphor, wherein: 放射線により発光する蛍光体素子と、前記蛍光体素子による発光を検出する光電変換素子とを備えた放射線検出器において、前記蛍光体素子として、請求項１ないし３いずれか１項に記載の酸化物蛍光体を用いたことを特徴とする放射線検出器。   4. The oxide according to claim 1, wherein the phosphor element includes a phosphor element that emits light by radiation and a photoelectric conversion element that detects light emitted from the phosphor element. 5. A radiation detector characterized by using a phosphor. 放射線源と、この放射線源に対向して配置された放射線検出器と、これら放射線源及び放射線検出器を保持し、被検体の周りで回転駆動される回転円板と、前記放射線検出器で検出された放射線の強度に基づき前記被検体の断層像を画像再構成する画像再構成手段とを備えたＸ線ＣＴ装置において、前記放射線検出器として請求項６に記載の放射線検出器を用いたことを特徴とするＸ線ＣＴ装置。   A radiation source, a radiation detector disposed opposite to the radiation source, a rotating disk that holds the radiation source and the radiation detector and is driven to rotate around the subject, and is detected by the radiation detector An X-ray CT apparatus comprising image reconstruction means for reconstructing a tomographic image of the subject based on the intensity of the emitted radiation, wherein the radiation detector according to claim 6 is used as the radiation detector. X-ray CT apparatus characterized by this.
JP2005339010A 2005-11-24 2005-11-24 Oxide phosphor, radiation detector and X-ray CT apparatus Expired - Fee Related JP4906322B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005339010A JP4906322B2 (en) 2005-11-24 2005-11-24 Oxide phosphor, radiation detector and X-ray CT apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005339010A JP4906322B2 (en) 2005-11-24 2005-11-24 Oxide phosphor, radiation detector and X-ray CT apparatus

Publications (3)

Publication Number Publication Date
JP2007145902A JP2007145902A (en) 2007-06-14
JP2007145902A5 true JP2007145902A5 (en) 2008-12-25
JP4906322B2 JP4906322B2 (en) 2012-03-28

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2634233B1 (en) 2010-10-29 2019-10-23 Hitachi Metals, Ltd. Polycrystalline scintillator for detecting soft x-rays
WO2012133796A1 (en) * 2011-03-31 2012-10-04 国立大学法人北海道大学 Scintillator plate, radiation measuring apparatus, radiation imaging apparatus, and scintillator plate manufacturing method
DE112014000521B4 (en) * 2013-01-23 2023-05-11 University Of Tennessee Research Foundation DEVICE INCLUDING A GARNET-TYPE SCINTILLATOR AND A PHOTODETECTOR, AND METHODS INCLUDING THE USE OF SUCH DEVICE
JP6186732B2 (en) * 2013-01-29 2017-08-30 堺化学工業株式会社 Method for producing composition for stress luminescent material, composition for stress luminescent material obtained by the method, and stress luminescent material produced from the composition
JP2019196441A (en) * 2018-05-09 2019-11-14 株式会社日立ハイテクノロジーズ Fluophor, light source and biochemical analyzer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6045676B2 (en) * 1979-04-02 1985-10-11 大日本塗料株式会社 Method for manufacturing phosphor
JPS62195078A (en) * 1986-02-21 1987-08-27 Nichia Kagaku Kogyo Kk Rare earth garnet fluorescent material and production thereof
JPH05140552A (en) * 1991-11-18 1993-06-08 Hitachi Ltd Fluorescent material and its production
JP3938470B2 (en) * 1997-12-24 2007-06-27 株式会社日立メディコ Phosphor, radiation detector using the same, and X-ray CT apparatus
JPH11293242A (en) * 1998-04-06 1999-10-26 Hitachi Ltd Red light emitting phosphor, its production, and cathode-ray tube using the same
JP2003027057A (en) * 2001-07-17 2003-01-29 Hitachi Ltd Light source and image display device using the same

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