| 摘要 |
Radiation measuring device comprising, for detecting the radiation, a scintillator 10, a photomultiplier tube 20 and a preamplification and filtering circuit 30 intended to deliver signals whose amplitude is related to that of the output current of the photodetector, characterised in that it comprises, at the output of this circuit, a sampling and analog-to-digital conversion circuit 40, an adder 50, a first register 60 for storing the output from the adder, whose output is sent to a second input of the adder, a second register 70 for storing the output of the adder, whose output constitutes the output of the measuring device, and in that it also comprises a pulse start detector 80, a clock circuit 90, a clock signal counter 100, and a circuit 110 for testing the number of these signals, whose output is sent to the second register 70 for validation of its output and to the first register 60 for its resetting. The circuit 40 is preceded by a non-linear amplifier 35 and followed by a code converter 45 which restores the linearity after conversion. <IMAGE>
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