Accurate amplitude measurement and time pick-off method for the broad pulse width range of nuclear detectors

Abstract

Using semiconductor detectors, the optimum shaping time constant varies between 0.1 to 50 μs which leads to a pulse width change of more than two orders of magnitude. In such a wide range, both single- and multichannel analysers can measure amplitudes only at the expense of a loss in the speed of measurement, in energy resolution or accuracy. The device presented here produces square-wave analog pulses by means of sampling technique. Square-wave pulses are ideal both for single- and multichannel amplitude analysers. The choice of the optimum sampling time follows automatically and the time pick-off characteristics are good. There is no additional dead time.