Method and apparatus for measuring gamma rays in a borehole
US4433240A · kind A · utility
16Cited by
3References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1981 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Jun 4, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gain stabilization loop for a gamma ray spectroscopy technique uses count rates from a pair of contiguous windows positioned on either side of at least one or more peaks of the detected spectrum. These count rates are combined to generate an error signal which minimizes the statistical errors. The stabilization loop modifies the response of the measurement apparatus so as to cancel the error signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.