US8083968B2
Active / In Force
US
⏱️ 2.3 years remaining
Solid scintillator, radiation detector, and X-ray tomographic imaging apparatus
Assignee: Niterra Materials Co Ltd
•
Filing: 2009-02-23
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Granted: 2011-12-27
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Expires: 2029-02-23
Abstract
Abstract The solid scintillator according to the present invention is expressed by the following formula (1): [Formula 1] (M 1-x-y Gd x Ce y ) 3 J 5 O 12 (1) (wherein M is at least one element of La and Tb; J is at least one metal selected from the group consisting of Al, Ga, and In; and x and y are such that 0.5≦x≦1 and 0.000001≦y≦0.2). The transmittance of light having a wavelength of 550 nm measured at a thickness of 2 mm is equal to or greater than 40%. The solid scintillator according to the present invention can be manufactured at low cost, has a high light emitting power, and does not release Cd because Cd is not contained.
Inventors
- 👤 Yukihiro Fukuta
- 👤 Masami Okamura
- 👤 Yasuhiro Shirakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:01
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/7767; C09K11/7769; C01; C01F; C01F17/00; C01F17/30; C01F17/32; C01F17/34; C01G; C01G15/00; C01G15/006; C04; C04B; C04B35/00; C04B35/01; C04B35/44; C04B35/622; C04B35/64; C04B35/645; C09K11/7774; C01P; C01P2002/00; C01P2002/50; C01P2002/80; C01P2002/84; C01P2004/00; C01P2004/60; C01P2004/61; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/3224; C04B2235/3227; C04B2235/3229; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5436; C04B2235/70; C04B2235/74; C04B2235/76; C04B2235/762; C04B2235/764
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
71 words
A solid scintillator represented by the following formula (1): (Tb 1-x-y Gd x Ce y ) 3 J 5 O 12 (1) wherein J is at least one metal selected from the group consisting of Al, Ga, and In; and x and y are 0.5<x<1 and 0.000001≦y≦0.2, wherein transmittance of light having a wavelength of 550 nm measured at a thickness of 2 mm is equal to or greater than 40%.
Claim 2
Dependent Claim
71 words
A solid scintillator represented by the following formula (1): (Tb 1-x-y Gd x Ce y ) 3 J 5 O 12 (1) wherein J is at least one metal selected from the group consisting of Al, Ga, and In; and x and y are 0.5<x<1 and 0.000001≦y≦0.2, wherein transmittance of light having a wavelength of 550 nm measured at a thickness of 2 mm is equal to or greater than 40%.
Claim 3
Dependent Claim
71 words
A solid scintillator represented by the following formula (2): (Tb 1-x-y Gd x Pr y ) 3 J 5 O 12 (2) wherein J is at least one metal selected from the group consisting of Al, Ga, and In; and x and y are 0.5<x<1 and 0.000001≦y≦0.2, wherein transmittance of light having a wavelength of 610 nm measured at a thickness of 2 mm is equal to or greater than 40%.
Claim 4
Dependent Claim
71 words
A solid scintillator represented by the following formula (2): (Tb 1-x-y Gd x Pr y ) 3 J 5 O 12 (2) wherein J is at least one metal selected from the group consisting of Al, Ga, and In; and x and y are 0.5<x<1 and 0.000001≦y≦0.2, wherein transmittance of light having a wavelength of 610 nm measured at a thickness of 2 mm is equal to or greater than 40%.
Claim 5
Dependent Claim
12 words
A radiation detector comprising the solid scintillator according to claim 1 .
Claim 6
Dependent Claim
14 words
An x-ray tomographic imaging apparatus comprising the radiation detector according to claim 3 .
Claim 7
Dependent Claim
12 words
A radiation detector comprising the solid scintillator according to claim 2 .
Claim 8
Dependent Claim
14 words
An x-ray tomographic imaging apparatus comprising the radiation detector according to claim 5 .
Claim 9
Dependent Claim
10 words
The solid scintillator according to claim 1 , wherein: 0.6≦x<1.
Claim 10
Dependent Claim
10 words
The solid scintillator according to claim 1 , wherein: 0.001≦y≦0.1.
Claim 11
Dependent Claim
12 words
The solid scintillator according to claim 1 , wherein J is Al.
Claim 12
Dependent Claim
12 words
The solid scintillator according to claim 1 , wherein J is Ga.
Claim 13
Dependent Claim
12 words
The solid scintillator according to claim 1 , wherein J is In.
Claim 14
Dependent Claim
23 words
The solid scintillator according to claim 1 , which is (Tb 0.3 Gd 0.6 Ce 0.1 ) 3 Ga 5 O 12 .
Claim 15
Dependent Claim
12 words
A radiation detector comprising the solid scintillator according to claim 12 .
Claim 16
Dependent Claim
10 words
The solid scintillator according to claim 2 , wherein: 0.69≦x<1.
Claim 17
Dependent Claim
10 words
The solid scintillator according to claim 2 , wherein: 0.0001≦y≦0.01.
Claim 18
Dependent Claim
12 words
The solid scintillator according to claim 2 , wherein J is Al.
Claim 19
Dependent Claim
12 words
The solid scintillator according to claim 2 , wherein J is Ga.
Claim 20
Dependent Claim
12 words
The solid scintillator according to claim 2 , wherein J is In.
Claim 21
Dependent Claim
23 words
The solid scintillator according to claim 2 , which is (Tb 0.3 Gd 0.6 Ce 0.1 ) 3 Ga 5 O 12 .
Claim 22
Dependent Claim
12 words
A radiation detector comprising the solid scintillator according to claim 19 .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2014-12-26 | 2015-06-27 | 2015-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2018-12-26 | 2019-06-27 | 2019-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2022-12-26 | 2023-06-27 | 2023-12-27 | $7700.00 | Window Closed / Lapsed |