Neutron spectrometry in neutron and charged-particle mixed fields with phoswich neutron detector

We have developed the phoswich neutron detector consisting of the NE115 and NE213 scintillators which can distinguish neutron and photon events from charged-particle events. The performance of distinguishing photon and neutron events from charged-particle events was investigated in two neutron and charged-particle mixed fields in NIRS, which gave satisfactory results. In these radiation environments, photon and neutron energy spectra were obtained by the unfolding technique and the evaluated response functions. The proton energy spectra were simultaneously obtained by using the relation between the proton light yield and the incident proton energy.