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Title: 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:
 [1];  [1];  [1];  [2]
  1. (San Diego, CA)
  2. (Escondido, CA)
Publication Date:
OSTI Identifier:
863800
Patent Number(s):
US 4251724
Assignee:
IRT Corporation (San Diego, CA) OSTI
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}
}

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