Reducing noise in uranium exploration
US4064436A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 18, 1976 |
| Grant date | Dec 20, 1977 |
| Priority date | — |
| Expiry date | Aug 18, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/02
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method and apparatus are described for reducing or removing the background noise caused by thoron gas (.sup.220 Rn) in uranium exploration conducted by the detection of radon gas (.sup.222 Rn) emanating from the ground. This is accomplished by the use of a number of alpha particle detectors, each of which is disposed in a protective enclosure. A permselective membrane, which permits, but selectively retards, the passage therethrough of gases is disposed in the path to be traversed before such gases can reach the alpha particle detector. The retarding influence of the membrane should be sufficient to make the concentration of thoron inside the enclosure small relative to the concentration of thoron outside the enclosure. The influence of the membrane on radon should be negligible, i.e. the randon concentration inside and outside the enclosure should be substantially equal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.