Measurements of the Fast Neutron Emission Spectrum of Californium-252 by Means of Proton-Recoil Spectrometers

The fast neutron emission spectrum of ²⁵²Cf has been investigated by means of proton-recoil spectrometers. With a large (900-mm-long) counter tube, the neutron distribution between 0.9 and 10 MeV could be determined. Monte Carlo calculated response functions were applied to unfold the measured proton-recoil distributions. With a smaller (466-mm-long) counter tube, the energy interval between 1 and 3 MeV was examined in a search for neutron fine-structure groups. No such groups could be established.