Pulse processing for gamma ray spectrometry-a novel method and its implementation

A time-variant pulse-processing technique is described that eliminates the gated integrator of previous designs with virtually no loss of performance. The simple processing concept requires only one component in the analog channel to be changed when a different processing time is required. This technique has allowed digital control of all the main functions to be implemented, giving a more-reliable performance by avoiding mechanical switches. The system can operate at input rates in excess of 10⁶ pulses/s with a gain stability better than 50 p.p.m./ degrees C.