Method and device for the energy-calibration of an electronic unit for detecting beta and/or X photons and gamma radiations with compton distribution emited by a radioactive aerosol

Abstract

Method for energy-calibrating an electronic unit for detecting beta and/or X photons radiations and Compton distribution gamma radiations emitted by a radioactive aerosol and comprising two identical chains, one chain recording the spectrum (beta+photons) and the other the photons spectrum and dicriminating any indications, wherein this calibration is effected with the aid of alpha source as follows: the two chains of alpha, beta and photons are identical and provided in the form of semiconductor detectors sufficiently thin so as to be only sensitive at the "Compton distribution" portion of the photonic spectrum; each of the semiconductor detectors is subjected to an alpha standard source with a known energy and being identical for each source, and the spectrum of the alpha particles of the corresponding source is recorded on each chain; the energetic calibration of each of the chains is made to correspond with the almost vertical descending front of the alpha spectrum of the standard sources so as to adjust the two chains identically with energy.

Dependencies are inferred from the claim text.