Method and apparatus for determination of temperature, neutron absorption cross section and neutron moderating power
US4251724A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1978 |
| Grant date | Feb 17, 1981 |
| Priority date | — |
| Expiry date | Jan 23, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A nuclear method and apparatus determines the temperature of a medium by injecting fast neutrons into the medium and detecting returning slow neutrons in three first energy ranges by producing three respective detection signals. The detection signals are combined to produce three derived indicia each systematically related to the population of slow neutrons returning from the medium in a respective one of three second energy ranges, specifically exclusively epithermal neutrons, exclusively substantially all thermal neutrons and exclusively a portion of the thermal neutron spectrum. The derived indicia are compared with calibration indicia similarly systematically related to the population of slow neutrons in the same three second energy ranges returning from similarly irradiated calibration media for which the relationships temperature, neutron absorption cross section and neutron moderating power to such calibration indicia are known. The comparison indicates the temperature at which the calibration indicia correspond to the derived indicia and consequently the temperature of the medium. The neutron absorption cross section and moderating power of the medium can be identified at t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.