Method and apparatus for determination of temperature, neutron absorption cross section and neutron moderating power
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 the same time.
- Inventors:
-
- San Diego, CA
- Escondido, CA
- Issue Date:
- OSTI Identifier:
- 863800
- Patent Number(s):
- 4251724
- Assignee:
- IRT Corporation (San Diego, CA)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01K - MEASURING TEMPERATURE
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
- DOE Contract Number:
- EY-76-C-02-0936
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; apparatus; determination; temperature; neutron; absorption; section; moderating; power; nuclear; determines; medium; injecting; fast; neutrons; detecting; returning; slow; energy; ranges; producing; respective; detection; signals; combined; produce; derived; indicia; systematically; related; population; specifically; exclusively; epithermal; substantially; thermal; portion; spectrum; compared; calibration; similarly; irradiated; media; relationships; comparison; indicates; correspond; consequently; identified; time; neutron moderating; detection signals; thermal neutron; fast neutron; thermal neutrons; energy range; fast neutrons; neutron absorption; energy ranges; epithermal neutrons; detection signal; /250/376/
Citation Formats
Vagelatos, Nicholas, Steinman, Donald K, John, Joseph, and Young, Jack C. Method and apparatus for determination of temperature, neutron absorption cross section and neutron moderating power. United States: N. p., 1981.
Web.
Vagelatos, Nicholas, Steinman, Donald K, John, Joseph, & Young, Jack C. Method and apparatus for determination of temperature, neutron absorption cross section and neutron moderating power. United States.
Vagelatos, Nicholas, Steinman, Donald K, John, Joseph, and Young, Jack C. Thu .
"Method and apparatus for determination of temperature, neutron absorption cross section and neutron moderating power". United States. https://www.osti.gov/servlets/purl/863800.
@article{osti_863800,
title = {Method and apparatus for determination of temperature, neutron absorption cross section and neutron moderating power},
author = {Vagelatos, Nicholas and Steinman, Donald K and John, Joseph and Young, Jack C},
abstractNote = {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 the same time.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1981},
month = {Thu Jan 01 00:00:00 EST 1981}
}