IDENTIFICATION OF NEUTRONS AGAINST THE GAMMA-RAY BACKGROUND BY CSI(TI) CRYSTAL DETECTORS

A method for identification of neutrons against the background of gamm a-quanta by the light pulse shape in CsI(Tl) is studied. Using the dat a from measurements performed at the synchrophasotron of the Institute of High-Energy Physics (IHEP), the dependence of the light pulse shap e in CsI(TI) on the specific ionization of detected particles in the e nergy loss range dE/dx = 1.5-200 MeV . cm(2)/g was refined. The depend ence of the separation efficiency both for electrons produced by gamma -quanta and for protons generated in interactions with neutrons on the energy was obtained within the energy range 12-160 MeV. Based on resu lts of the present study and data taken from the literature, it was pr oven that the method under study makes it possible to reliably separat e electrons and protons at proton energies between 1 and 140 MeV.