Energy filter for a Geiger-Muller tube
US4608511A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1984 |
| Grant date | Aug 26, 1986 |
| Priority date | — |
| Expiry date | Jan 12, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21K1/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A gamma ray energy filter for a improving the uniformity of response of a Geiger-Muller tube comprises only two spaced filter bodies. To improve the uniformity of the energy response, the two filter bodies consist of a lead/tin alloy containing substantially less than 95% but not substantially less than 40%, and suitably 50-60%, of lead. To improve the polar response particularly in directions away from the normal to the longitudinal axis of the tube, and at quite low energies, adjacent edges of the filter bodies are inclined to the longitudinal axis over a majority of their radial thickness at less than 45.degree., and circumferentially-spaced apertures with axes inclined to the longitudinal axis are provided in at least one of the bodies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.