Title:
SCINTILLATOR MATERIAL, RADIATION DETECTOR, AND RADIOGRAPHIC EXAMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/037395
Kind Code:
A1
Abstract:
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).)
Inventors:
IKARI MASANORI (JP)
Application Number:
PCT/JP2014/071550
Publication Date:
March 19, 2015
Filing Date:
August 18, 2014
Export Citation:
Assignee:
SHINETSU CHEMICAL CO (JP)
International Classes:
C09K11/78; A61B6/03; C09K11/00; G01T1/20; G21K4/00
Foreign References:
| US20120119092A1 | 2012-05-17 | |||
| JPS5997524A | 1984-06-05 |
Other References:
JOURNAL OF LUMINESCENCE, vol. 6, no. 2, 1973, pages 105 - 15
MATERIALS LETTERS, vol. 59, 2005, pages 868 - 871
DALTON TRANSACTIONS, vol. 42, no. 47, 2013, pages 16621 - 16629
MATERIALS LETTERS, vol. 59, 2005, pages 868 - 871
DALTON TRANSACTIONS, vol. 42, no. 47, 2013, pages 16621 - 16629
Attorney, Agent or Firm:
KOJIMA Takashi et al. (JP)
Takashi Kojima (JP)
Takashi Kojima (JP)
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