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AbstractAbstract
[en] Methods are described for calculating the probabilities, p(m), of detection of m neutrons, inside a split millisecond counting gate, m varying from zero to some units. At the present stage, these methods suppose the source to be very small. Using the generating function concept, they concern both possible modes of the counting system, for opening gates, i.e.: 1) Trigger pulses randomly with regard to the emitted neutrons, 2) Trigger pulses from the detected neutrons themselves. Computed values are finally compared to the measured ones. This comparison seems to be very favourable, since the respective deviations are often lower than 1 %
[fr]
On decrit les methodes utilisees pour le calcul des probabilites, p(m), de detection, dans une fenetre de comptage d'une fraction de milliseconde, de m neutrons, m variant de 0 a quelques unites. Ces methodes, au stade actuel, supposent la source ponctuelle. Utilisant le concept de fonction generatrice, elles concernent les deux modes possibles de fonctionnement du dispositif de comptage: 1) declenchement des fenetres de facon aleatoire par rapport aux neutrons emis, 2) declenchement des fenetres par les neutrons detectes eux-memes. On compare finalement des valeurs calculees a celles mesurees: cette comparaison parait tres favorable, les ecarts etant souvent tres inferieurs a 1 %Original Title
Modelisation d'un systeme de comptage neutronique utilise pour la verification des caracteristiques d'un milieu spontanement fissile
Source
Sep 1986; 18 p
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