The parameters of the full absorption neutron spectrometer

The methods of obtaining the parameters of the full absorption neutron spectrometer constructed in JINR (full scintillator volume V = 24 l) and used in experiments studying the muon catalysis process are considered. These parameters have been obtained from the analysis of pulse-height distributions measured with γ-sources of different energies and with neutrons selected from the 238Pu-Be spectrum using the TOF method. A value of σFWHM=0.09(1+1/√Ee (MeV) has been obtained for the pulse-height resolution. It is two times better than that obtained for a detector of smaller size. The threshold energy for n-γ separation Eγthr ≅ 50 keV, which corresponds to the best results obtained with small detectors. (orig.)