US3577161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation dosimeter having sensitive material containing lithium hydride
Assignee: European Atomic Energy Community Euratom
•
Filing: 1967-12-08
•
Granted: 1971-05-04
•
Expires: 1987-12-08
Abstract
Abstract A radiation dosimeter based on the phenomenon of thermoluminescence. The sensitive material in the dosimeter is, at least in part, lithium fluoride, and to the sensitive material is added lithium hydride.
Inventors
- 👤 Martin Oberhofer
- 👤 Jurgen Jaspert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:07
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/16; G21C3/20; B; B23; B23D; B23D21/00; C; C09; C09K; C09K11/00; C09K11/08; C09K11/61; C09K11/615; C09K11/616; C23; C23C; C23C16/00; C25; C25D; C25D5/00; C25D5/34; C25D5/46; G01; G01T; G01T1/00; G01T1/02; G01T1/10; G01T1/11; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
22 words
A radiation dosimeter as claimed in claim 1, wherein the radiation-sensitive material is disposed on a carrier that can be heated electrically.
Claim 2
Dependent Claim
28 words
A radiation dosimeter as claimed in claim 2, wherein the lithium hydride is shielded from the atmosphere by the disposition of the carrier in an inert gas atmosphere.
Claim 3
Dependent Claim
34 words
A radiation dosimeter as claimed in claim 2, wherein the sensitive material is disposed on the carrier in different zones, each of which zone has a specific sensitivity to a given type of radiation.
Claim 4
Dependent Claim
23 words
A radiation dosimeter as claimed in claim 4, and further comprising a plurality of light-conductors disposed so as to correspond with each zone.
Claim 5
Dependent Claim
27 words
A radiation dosimeter as claimed in claim 2, wherein the carrier consists of an electrically conductive foil on which are disposed connections for the supply of current.
Claim 6
Dependent Claim
36 words
A radiation dosimeter as claimed in claim 6, and further comprising a hermetic radiation-transparent envelope surrounding said carrier and said radiation-sensitive material and through which said connections pass, and an inert gas atmosphere within said envelope.
Claim 7
Dependent Claim
18 words
A radiation dosimeter as claimed in claim 1, wherein the lithium fluoride is enriched with the isotope lithium-6.
Claim 8
Dependent Claim
23 words
A radiation dosimeter as claimed in claim 1, and further comprising a radiation-transparent hermetically sealed coat on separate grains of the lithium hydride.
Claim 9
Dependent Claim
24 words
A radiation dosimeter as claimed in claim 9, wherein said coat is an aluminum hermetically sealed coat on separate grains of the lithium hydride.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |