The Comparison of Neutron Beams through ۷Li(p,n) Reactions for the Design of a Thermal Neutron Radiography Facility using the MCNPX Code
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJE-33-11_012
تاریخ نمایه سازی: 6 اردیبهشت 1400
Abstract:
In this work, a comparison of six neutron beams was carried out using the MCNPX Monte Carlo code for thermal neutron radiography purposes. The necessary neutrons produced via the ۷Li(p,n) reaction for ۱ mA proton beam with energies ۲.۳, ۲.۵, ۳, ۴, ۴.۵, and ۵ MeV. The design of the facility was governed from the purpose to achieve the maximum thermal neutron flux in the position of the investigated object. An extensive number of simulations were realized for every source under different conditions. The higher energy of proton beam provides higher intensity for the neutron source but at the same time, the produced spectrum shifted to the fast neutron area. Protons with energies from ۲.۳ to ۳ MeV are more suitable when the thermal neutron content is the main issue of the facility design. Neutrons produced by proton beam in the energy range of ۴–۵ MeV provide higher thermal neutron fluxes at the cost of the thermal neutron content. The final choice is a compromise, between the thermal neutron content that can be tolerated, in combination with a workable thermal neutron flux.
Keywords:
۷Li(p , n) Reaction , MCNPX Monte Carlo Code , Non Destructive Testing , Thermal Neutron Radiography
Authors
J. G. Fantidis
Department of Electrical Engineering-Department of Physics, International Hellenic University, Kavala, Greece
G. E. Nicolaou
Laboratory of Nuclear Technology, School of Engineering, ‘Democritus’ University of Thrace, Xanthi, Greece
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