The invention relates to the technical physics, in particular to a technique of measuring flows of low energy X-radiation, and can be used in a system for producing metrological service reference means measuring photon flux in the low energy X-rays. Izobeteni aim is to improve the measurement accuracy and measurement range to lower energies. Summary of the Invention consists in a method of accounting Chispa-electron scintillation pulses whose amplitude lies in the noise photomultiplier tube (PMT). When counting the pulse-electron scintillation detector and noise pulses do not are recorded, and from the other diskriminiruyuts scintillation pulses of pulse shape. Correction for the number of the Poisson distribution is made after the measurement of the average number of electrons in the scintillation pulse. For this scintillation crystal is separated from the PMT, and sets it on the distance from the photocathode photomultipliers providing registration scintillation mainly in the form of single-electron pulses. Determined amplitude / pulse odnoe- electrons were combined with the crystal and photomultiplier determined average amplitude scintillation tsionno- th pulse ratio of these amplitudes yields average number ele1aronov pulse. 3 yl.
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