Published 1957 | Version v1
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Measurement of the temperature of the neutrons in reactor G1

Creators

  • 1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires

Description

A precise experimental method has been adapted to the analysis of the spectrum of neutrons in the thermal region. This method uses the technique of modulation applied to a beam of neutrons issuing from a characteristic point in the pile. The analysis of the spectrum is made by adjusting, by the method of least squares, an analytical form to the experimental results. In this report are given the results obtained with a beam from the centre of the moderator of G1. The spectrum of this beam essentially represents the spectrum of the neutrons in the moderator. The most probable velocity was determined by means of Maxwell's functions. The measurements were made of different moderator temperatures between 304 deg. K and 435 deg. K. (author)

Availability note (English)

Available from INIS in electronic form

Abstract (French)

Une methode experimentale precise a ete mise au point pour l'analyse du spectre des neutrons dans le domaine thermique. Cette methode utilise la technique de la modulation appliquee a un faisceau de neutrons issu d'un point caracteristique de la pile. L'analyse du spectre est faite en ajustant par la methode des moindres carres une forme analytique aux resultats experimentaux. Dans ce rapport, on donne les resultats obtenus sur un faisceau du centre du moderateur de G1. Le spectre de ce faisceau represente convenablement le spectre des neutrons dans le moderateur. On s'est limite ici a une fonction de Maxwell dont on a recherche la vitesse la plus probable. Les mesures ont ete faites avec une temperature du moderateur variant entre 304 deg. K et 435 deg. K. (auteur)

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Additional details

Additional titles

Original title (French)
Mesure de la temperature des neutrons dans la pile G1

Publishing Information

Imprint Pagination
4 p.
Report number
CEA-R--670-K

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
38054591
Subject category
S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
CADMIUM 106 TARGET; ELECTRON TEMPERATURE; FREQUENCY MODULATION; G-1 REACTOR; GRAPHITE; INTEGRAL CALCULUS; LEAST SQUARE FIT; MODERATORS; NAI DETECTORS; NEUTRON ABSORBERS; NEUTRON BEAMS; NEUTRON SLOWING-DOWN THEORY; NEUTRON SPECTRA; NEUTRON TEMPERATURE; PHASE SHIFT; PHOTOMULTIPLIERS; TEMPERATURE RANGE 0273-0400 K; TEMPERATURE RANGE 0400-1000 K; THERMAL NEUTRONS
Descriptors DEC
AIR COOLED REACTORS; BARYONS; BEAMS; CARBON; ELEMENTARY PARTICLES; ELEMENTS; FERMIONS; GAS COOLED REACTORS; GCR TYPE REACTORS; GRAPHITE MODERATED REACTORS; HADRONS; MATHEMATICAL SOLUTIONS; MATHEMATICS; MAXIMUM-LIKELIHOOD FIT; MEASURING INSTRUMENTS; MINERALS; MODULATION; NEUTRONS; NONMETALS; NUCLEON BEAMS; NUCLEONS; NUMERICAL SOLUTION; PARTICLE BEAMS; PHOTOTUBES; PLUTONIUM PRODUCTION REACTORS; PRODUCTION REACTORS; RADIATION DETECTORS; REACTORS; SCINTILLATION COUNTERS; SOLID SCINTILLATION DETECTORS; SPECTRA; TARGETS; TEMPERATURE RANGE; THERMAL REACTORS