Liquid scintillation measurement system with active guard shield
US5146093A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1989 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | May 22, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/204
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A low-level liquid scintillation measurement system for counting sample optical events resulting from the radioactive decay of a constituent of a sample to be measured while reducing the counting of background optical events which are optical events produced by background radiation and which create electrical pulses other than pulses representing a sample optical event. This system includes a detector located adjacent the sample for detecting optical events and for converting optical events into electrical pulses, a coincidence sensor for receiving the electrical pulses from the detector and producing a trigger pulse when the electrical pulses from the detector coincide with each other, a burst detector for receiving the trigger pulses from the coincidence sensor and the electrical pulses from the detector for determining the number of electrical pulses present in a selected interval following each of the trigger pulses, evaluator connected to the burst detector for determining, in response to the number of pulses detected in the selected interval, the extent to which the optical event represented by the corresponding trigger pulse should be treated as a sample optical event or a b…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.