US3896306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fast-neutron solid-state dosimeter
Assignee: United States Department of Energy
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Filing: 1974-06-20
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Granted: 1975-07-22
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Expires: 1994-06-20
Abstract
Abstract A fast-neutron solid-state dosimeter for personnel dosimetry has been provided which involves permanently and intimately mixing a thermoluminescent detector (TLD) material with a high-melting organic compound having a high hydrogen content. This dosimeter employs recoil proton registration with the TLD material, the recoil protons being formed by the interactions of fast neutrons with the hydrogen of the organic substance. Choice of an organic which does not melt or otherwise degrade below about 300*C permits reading the TLD without previous separation, and the reuse of the dosimeter.
Inventors
- 👤 Klaus H Becker
- 👤 Fred F Haywood
- 👤 Philip T Perdue
- 👤 John H Thorngate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:00
CPC Classifications
G; G01; G01T; G01T3/00; G01T1/00; G01T1/02; G01T1/10; G01T1/11
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
36 words
AN IMPROVED FAST-NEUTRON SOLID-STATE DOSIMETER COMPRISING AN INTIMATE MIXTURE OF P-SEXIPHENYL AND A FINELY POWDERED THEMOLUMINESCENT MATERIAL SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF CASO4:DY, CASO4:TM, CAF2:DY, BEO, CAF2:MN, LI2B07:MN, NATUAL CAF2, LIF:MG, TI, AND MG2SI04:TB.
Claim 2
Dependent Claim
36 words
AN IMPROVED FAST-NEUTRON SOLID-STATE DOSIMETER COMPRISING AN INTIMATE MIXTURE OF P-SEXIPHENYL AND A FINELY POWDERED THEMOLUMINESCENT MATERIAL SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF CASO4:DY, CASO4:TM, CAF2:DY, BEO, CAF2:MN, LI2B07:MN, NATUAL CAF2, LIF:MG, TI, AND MG2SI04:TB.
Claim 3
Dependent Claim
21 words
The dosimeter set forth in claim 1, wherein the intimate mixture of selected materials is hot-pressed to form a dense pellet.
Claim 4
Dependent Claim
18 words
The dosimeter set forth in claim 2, wherein said dosimeter pellet is encased with a light-transparent, heat-resistant enclosure.
Claim 5
Dependent Claim
14 words
The dosimeter set forth in claim 2, wherein the selected thermoluminescent material is CaSO4:Dy.
Claim 6
Dependent Claim
24 words
The dosimeter set forth in claim 2, wherein the p-sexiphenyl and the selected thermoluminescent material of the intimate mixture have equal proportions, by weight.
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) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |