Development of a gaseous proton-recoil detector for neutron flux measurements between 0.2 and 2 MeV neutron energy

Absolute measurements of neutron fluence are an essential prerequisite of neutron-induced cross section measurements, neutron beam lines characterization and dosimetric investigations. The H(n,p) elastic scattering cross section is a very well known standard used to perform precise neutron flux meas...

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Bibliographic Details
Published in:arXiv.org 2018-11
Main Authors: Marini, Paola, Mathieu, Ludovic, Aïche, Mourad, Czajkowski, Serge, Jurado, Beatriz, Tsekhanovich, Igor
Format: Article
Language:English
Subjects:
Elastic scattering
Fluence
Neutron beams
Neutron flux
Neutrons
Protons
Recoil
Scattering cross sections
Sensors
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Summary:Absolute measurements of neutron fluence are an essential prerequisite of neutron-induced cross section measurements, neutron beam lines characterization and dosimetric investigations. The H(n,p) elastic scattering cross section is a very well known standard used to perform precise neutron flux measurements in high precision measurements. The use of this technique, with proton recoil detectors, is not straightforward below incident neutron energy of 1 MeV, due to a high background in the detected proton spectrum. Experiments have been carried out at the AIFIRA facility to investigate such background and to determine its origin and components. Based on these investigations, a gaseous proton-recoil detector has been designed with a reduced low energy background. A first test of this detector has been carried out at the AIFIRA facility, and first results will be presented.
ISSN:2331-8422