PROPORTIONAL COUNTER CIRCUITRYRadiation DetectorsBy using a discriminator,the scalerFigure 12 Discriminatorcan be set to read only the largerpulses produced by the neutron. Adiscriminator is basically a singlechannel analyzer with only onesetting. Figure 12 illustrates theoperation of a discriminator.If the discriminator is set at 2volts, then any input pulse > 2volts causes an output pulse.Figure 13 shows a typical circuitused to measure neutrons with aBF3proportional counter.Figure 13 BF3Proportional Counter CircuitIC-06 Page 26 Rev. 0
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