Development of monitoring method of spatial neutron distribution in neutrons–gamma rays mixed field using imaging plate for NCT—Depression of the field

Authors:   Kenichi Tanaka,Satoru Endo,Masaharu Hoshi,Jun Takada,
Journal: Applied Radiation and Isotopes
https://doi.org/10.1016/j.apradiso.2011.02.050
Abstract: The degree of depression in the neutron field caused by neutron absorption in the materials of an imaging plate (IP) was investigated using MCNP-4C. Consequently, the IP doped with Gd, which reproduced the distribution of 157Gd(n,γ)158Gd reaction rate in the previous study, depresses the relative distribution by about 50%. The depression for the IP in which Gd is replaced with similar amount of B atoms was estimated to be about 10%. The signal intensity for this IP is estimated to be at a similar level with that for Gd-doped IP.