Abstract
This review paper gives the description on the recent development of various new sophisticated neutron spectrometers. For neutrons of energies beyond 100 MeV, the self-TOF detector using the NE102A plastic scintillators, large-scale NE213 organic liquid scintillator, and spallation detectors of C and Bi have recently been developed by our group, especially for use in neutron target and shielding experiments. Various neutron spectrometers have also been developed for use in the charged particle and neutron mixed field which is realized in space environment. The following spectrometers are briefly described: 1) Phoswich detector which combines the NE115 plastic scintillator and the NE213 scintillator, 2) Anti-coincidence detector system using . ΔE and E counters, and 3) Bonner sphere (multi-moderator detector) mounted a 3He counter or a pair of 7Li and 7Li glass scintillators.
