SYSTEM FOR DETECTION OF SUBSTANCES AND IN PARTICULAR EXPLOSIVES, BY NEUTRONIC IRRADIATION THEREOF.

摘要

PCT No. PCT/FR90/00701 Sec. 371 Date Jun. 20, 1991 Sec. 102(e) Date Jun. 20, 1991 PCT Filed Oct. 2, 1990 PCT Pub. No. WO91/05272 PCT Pub. Date Apr. 18, 1991.System for the detection of substances and in particular explosives, by neutron irradiation thereof. It comprises means (4) for the irradiating, by neutrons, of an object (6) which may contain a substance, means (14) for detecting the gamma radiation which can be emitted by the object and means (18) for processing the signals supplied by the detection means. These processing means count the gamma photons of each line of a plurality of characteristic lines of at least one chemical element of the substance, determining for each line a probability of false detection of the chemical element associated with said line, determine the product of these probabilities, compare said product with a threshold fixed by users and notify the latter if the product is below the threshold, the object then being assumed to contain the substance.