Assembly and method for measuing ionizing radiation with background noise correction

摘要

The noise originating from the ambient radiation is derived from the measurement of the radiation of a source (S) via a preliminary correlation calculated between the measurements of the main detector (1) and of at least one auxiliary detector (2): when the radiating source (S) is present, the auxiliary detector (2), which keeps on measuring the ambient radiation, is used to evaluate the proportion of the main detector (1) measurement which comes from the ambient radiation. This invention applies to the measurement of the activity of various objects proving a low radiation level.