US4510394A
Expired / Lapsed
US
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Material for scintillators
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1982-06-16
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Granted: 1985-04-09
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Expires: 2002-06-16
Abstract
Abstract Material for scintillators, application to the construction of very fast, high energy photon detectors and to the construction of tomographs. The material for scintillators is constituted by barium fluoride which, under excitation, is subject to light emission having a slow component with a maximum centered on 3200 Å and a fast component with a maximum centered on 2250 Å, the barium fluoride being purified so as to reduce the defects of its crystal lattice, in order to reinforce the intensity of the fast component of its light emission.
Inventors
- 👤 Robert Allemand
- 👤 Michel Laval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:12
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/29; G01T1/2914; G01T1/2985; G01T1/16; G01T1/20; G01T1/202; G01T1/2023
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
95 words
A very fast scintillator for the detection of high energy photons, said scintillator being comprised of barium fluoride material, said material being transmissive to light at least in the wavelength range of 2000 Å to 2500 Å, said material being excited by said high energy photons to emit a first component and a second component of light, said first component being a slow component and having a wavelength above 2500 Å, said second component being a fast component in the wavelength range of 2000 Å to 2500 Å with a time constant of 0.8 ns.
Claim 2
Dependent Claim
95 words
A very fast scintillator for the detection of high energy photons, said scintillator being comprised of barium fluoride material, said material being transmissive to light at least in the wavelength range of 2000 Å to 2500 Å, said material being excited by said high energy photons to emit a first component and a second component of light, said first component being a slow component and having a wavelength above 2500 Å, said second component being a fast component in the wavelength range of 2000 Å to 2500 Å with a time constant of 0.8 ns.
Claim 3
Dependent Claim
16 words
A scintillator according to claim 1 wherein said scintillator is used for photon transit time measurements.
Claim 4
Dependent Claim
16 words
A scintillator according to claim 1 wherein said scintillator is used for the production of tomographs.
Claim 5
Dependent Claim
12 words
An scintillator according to claim 3, wherein the tomographs are positron tomographs.
Claim 6
Dependent Claim
14 words
An scintillator according to claim 4, wherein the tomographs are also transit time tomographs.
References Cited (Backward Citations)
US4110080A
Cited
US4398092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |