A Simple Total-Reflecting Low-Energy Neutron Spectrometer

An instrument proposed as a total-reflecting low-energy neutron spectrometer was designed, constructed, and tested at the Puerto Rico Nuclear Center. The tests consisted of measurements of the spectra of three slightly different core conditions at a radial beam hole of the swimming pool reactor of the PRNC. The data obtained indicate that the instrument is very sensitive and surprisingly able to detect changes in the neutron spectra due to small changes in the reactor core configuration.