DETECTION OF IONIZING-RADIATION UNDER CONDITIONS OF INTENSE LOW-ENERGY BACKGROUND RADIATIONS

A short review of means used in the spectrometry of ionizing radiation s under the conditions of intense fluxes of low-energy background radi ations is presented. A simple circuit is described for making it possi ble (using a linear discriminator) to cut off background pulses when t hey are short and the probability of superpositions is small. The enha ncement of the signal-to-noise ratio is ensured mainly by integrating the signals produced by the effect under study. The minimum input sign al duration is 50 ns. The output integrator signals have a flat top wi th a duration of similar to 1 mu. They can be recorded with ordinary s pectrometric analog-to-digital converters of the microsecond range. Th e circuit contains no switches or other commutating units. The device can operate without any modifications, with input signal durations fro m 50 to 1000 ns.