Method and device for detection of substances and in particular of explosives, by neutron irradiation of those - ci

摘要

According to the invention, it brings the object 34 to a first control station i to iv in which it is irradiated by the object of the thermal neutrons; it detects the gamma radiation of capture likely to be emitted by the object and is characteristic of a chemical element of the substance to be detected; if the intensity of this radiation is greater than a predetermined threshold, it brings the object to a second control station v, vi, in which it is irradiated by the object of the fast neutrons and gamma radiation is then ready to be emitted by the object and characteristic of the chemical element, the energy of the fast neutrons is at least equal to that of the gamma radiation, prompt, in order to confirm or invalidate the information obtained at the first station. / p & & p & application to the control of luggage.