Method and device for determining the distribution of .beta.rays emerging from a surface
US5025162A · kind A · utility
8Cited by
2References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1990 |
| Grant date | Jun 18, 1991 |
| Priority date | — |
| Expiry date | Apr 25, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/2935
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and device are disclosed for determining the distribution of the .beta. rays emerging from a surface. The device comprises an enclosure (3) filled with a gas mixture having a first preamplification chamber (6) between two grids (9 and 10), a second transfer chamber (7) between two grids (10 and (11) and a third multiplication chamber (8) between two grids (11 and 12); as well as three DC voltage sources (13, 14 15); and an impeding assembly (22, 23, 17, 18, 19, 20 and 21).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.