A Gamma-Ray Detector Of The Ines Setup For Measuring Neutron Cross Sections

A liquid-scintillator gamma-ray detector has been investigated. The electronics, which consists of a preamplifier and a shaping amplifier of the detector signals, is described. A method for determining the start pulse for the time-of-flight technique has been developed based on the detection of several (three or more) gamma rays from a neutron source in a narrow time interval. This method is insensitive to the timing instability of the sync pulse of the proton beam. The energy resolution of the gamma-detector section is compared to the simulation results for the gamma-ray detection. The potential of the gamma detector for measuring cross sections for radiative neutron capture by a nucleus is shown.