Method of improving the sensitivity of radiation detectors

This is a method to improve the signal/noise ratio of photoconductive cells used as radiation detectors. The method is characterized by the fact that the sensitvity of the radiation-sensitive resistors is determined by thermal noise and therefore independent of the detector system, and that the detector is disconnected from the analyzing system in the intervals between short voltage or current pulses, when it is only working as a source of noise. For evaluation, the mean square is calculated of signal and noise voltage. The pulses from a periodic sequence with equal amplitude if the detector is not irradiated. Instead of calculating the effective values it is also possible to use the transverse waves whose amplitude slowly attenuates in a periodic sequence of short pulses. (ORU)