Open AccessA method of fast-neutron imaging with energy threshold based on an imaging plate
Author(s) -
Faqiang Zhang,
Jianmin Qi,
Jianhua Zhang,
Linbo Li,
Dingyang Chen,
Xie Hong-Wei,
Yang Jian-Lun,
Jinchuan Chen
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.128701
Subject(s) - neutron , neutron imaging , neutron temperature , foil method , neutron generator , neutron scattering , materials science , neutron detection , bonner sphere , scattering , neutron cross section , neutron source , neutron time of flight scattering , neutron stimulated emission computed tomography , nuclear physics , physics , optics , composite material
A method of fast-neutron imaging with energy threshold is presented in this paper, which is based on an imaging plate covered with a metal foil and a hydrogen-rich foil in order to reduce the contribution from the neutrons with a lower energy such as the scattering neutrons from samples. The method is capable of effectively reducing the relative sensitivity of the imaging detector to neutrons with energies in a certain energy range. The 14 MeV neutron imaging structure with an energy threshold is designed, and it includes a TR imaging plate covered with an about 150 m Pb foil and a 500 m polyethylene foil. The calculated results show that for the present structure its sensitivity to the neutrons with smaller than 8 MeV is reduced by 30% less than that to the neutrons with 14 MeV. The fast-neutron radiography is validated experimentally on a DT neutron generator (K400). The results indicate that the neutron imaging structure with an energy threshold is available to remove the edge enhancement effect introduced by scattering neutrons from samples.