METHOD FOR DETECTING A MOVING RADIOACTIVE SOURCE, AND ASSOCIATED DEVICE

摘要

The invention relates to a method for detecting a radioactive source which moves along a linear path substantially parallel to an alignment of N detectors, the method including: forming NxNt pulse count values Mi,t (i=1, 2,..., N and t=1, 2,..., Nt) from NxNt detection signals output by the N detectors in the form of a series in time of Nt sets of N signals detected simultaneously by the N detectors over a same durationΔt, a pulse count value representing a number of pulses detected by a detector over a duration ofΔt; and calculating, using a computer, a set of Nt correlation products Rt such that (I) (t=1, 2,..., NR) with (II), Nt being a very large whole number compared to N, a static mean (III) of NxNt count values such as (IV), and a condition of correlation for each correlation product Rt such that, if (V), a radioactive source is considered to have moved in front of the detectors, and if (VI), no source is considered to have moved in front of the detectors, K2 being a scalar, and (VII) being the standard deviation from the mean (III).