The scintillator material, radiation detector and radiation inspection device

文件类型：PDF文档
文件大小：226K
This invention provides a scintillator material that comprises either a light-transmitting ceramic consisting primarily of a complex oxide that can be represented by formula (1) or a single crystal of such a complex oxide. When excited by X-rays and/or gamma rays, said scintillator material emits scintillation light having a peak emission wavelength that is further towards the long-wavelength end of the visible-light region than the peak emission wavelengths of existing scintillator materials. This scintillator material also has a high transmittance with respect to the aforementioned scintillation light, has a short decay time, and can be manufactured by heat-treating, at a temperature less than or equal to 1, 800°C, a complex oxide having a comparatively simple composition, reducing manufacturing costs. (1) (TbxR1−x−yCey)2B2O7 (In formula (1), 0.2 ≤ x < 1, 0.00001 ≤ y ≤ 0.01, and x+y ≤ 1; R represents one or more rare earth elements selected from among the group consisting of yttrium, gadolinium, lutetium, lanthanum, holmium, thulium, europium, dysprosium, and praseodymium; and B represents one or more elements selected from among the group consisting of titanium, tin, hafnium, silicon, germanium, and zircon (but not silicon only or germanium only).)