Method and device for determining a degree of consideration fortuitous in a counter a scintillation using the technique of coincidence

摘要

P the invention relates to a device to be used with a scintillation counter, in order to determine an account of the incidental coincidences due to events resulting from the emission of a single quantas may occur so that the pairs of these coinciding to be detected at a rate of one in each detector and are counted as radioactive disintegrations. / p & & p & according to the invention, it comprises a first detector 20 of the real and fortuitous coincidences between the pulses of the detectors 12; a delay element 30 of the pulses of one of the detector; a second detector 32 of the coincidence between the pulses delayed of the means 30 and the pulses is not delayed by the other detector, in order to obtain an estimate of the incidental coincidences; and a compensation means 34, 38 in order to obtain a corrected. / p & & p & in particular, the invention applies to the measurement of radioactivity. / p