US4059765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gamma-ray scintillation detector
Assignee: Japan Atomic Energy Agency
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Filing: 1976-04-14
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Granted: 1977-11-22
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Expires: 1996-04-14
Abstract
Abstract A plurality of independent scintillators are used to measure radiation dose rate. The opening of a light shielding shutter locating the scintillators and a photomultiplier is adjusted to maintain linear proportional relationship between the counting rate and the dose rate.
Inventors
- 👤 Hatsumi Tatsuta
- 👤 Shigeru Kumazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:40
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
52 words
A γ-ray scintillation detector for measuring radiation dose rate comprising: a scintillator substratum provided with a plurality of independent scintillators, a photomultiplier tube facing the scintillator substratum, and a light shielding shutter locating between the scintillator substratum and the photomultiplier, the opening of said shutter through which light passes through being adjustable.
Claim 2
Dependent Claim
52 words
A γ-ray scintillation detector for measuring radiation dose rate comprising: a scintillator substratum provided with a plurality of independent scintillators, a photomultiplier tube facing the scintillator substratum, and a light shielding shutter locating between the scintillator substratum and the photomultiplier, the opening of said shutter through which light passes through being adjustable.
Claim 3
Dependent Claim
67 words
A γ-ray scintillation detector of claim 1, wherein the adjustment of the opening is stepwise adjustable for decreasing the fluorescent luminous quantity impinging upon the photo-multiplier, said fluorescent luminous quantity varying in proportion to the increment of the γ-ray dose rate, thereby maintaining a linear proportional relationship between the counting rate and the dose rate over a wide range from low dose rate to high dose rate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |