Novel Generation Method of 24-keV Monoenergetic Neutrons Using Accelerators

This paper describes a novel 24‐keV monoenergetic neutron source that consists of an iron filter and a thick lithium target. The 24 keV neutrons are obtained with iron filtering of a neutron beam from the 7Li(p,n)7Be reaction near threshold energy using the 4 MV Pelletron accelerator. Neutron spectra were calculated using the NRESP‐ANT simulation code. This neutron source was investigated using a 3He cylindrical proportional counter to measure the spatial distribution and neutron flux.