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THE USE OF BALL MODERATORS FOR NEUTRON SPECTROMETRY

Journal: The Way of Science (Vol.1, No. 30)

Publication Date:

Authors : ;

Page : 16-19

Keywords : neutron spectrometer; Bonner sphere.;

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Abstract

A spectrometer with ball moderators of polyethylene was designed at FSUE "VNIIFTRI". As a detector of slow neutrons there were used a LiI scintillator with natural lithium and a spherical proportional counter with a diameter of 5 cm filled with 10BF3 gas. Using two different detectors can reduce systematic measurement error. Response from the detectors which are placed in the ball moderators, is performed by using a specially designed device. Measurement and processing of measurements are carried out automatically using a developed program named ?boll?. Restoration of the neutron spectrum is carried out using a developed program named ?spectr?. Energy dependence of the sensitivity of the detectors placed in the moderators, which is needed for neutron spectrum restoration, is calculated using the Monte Carlo method.

Last modified: 2016-08-15 18:15:39