Gamma Amplifier-Discriminator

For applications involving the routine laboratory measurement of gamma radiation, an instrument is described which is simple to operate, versatile, compact, and reliable. It consists of a pulse amplifier with charge-sensitive input and delay-line shaping, a differential discriminator capable of covering the range from 2 KeV to 4 MeV, a calibration pulser, and a power supply. All controls are calibrated directly in terms of gamma energy. Construction is modular for ease of maintenance, and all circuits use solid-state components.