NUCLEAR RESONANCES IN ACTIVATION ANALYSIS, AND PARTICULARLY, ITS APPLICATION TO DETECTION OF NITROGEN BASED EXPLOSIVES IN LUGGAGE

摘要

the apparatus and process are used to detect the presence of an element of interest in an object (12). the object (12) is placed at the location where a beam of gamma rays (15) with the required energy is directed so as to be dispersed by the element (16). the excited atoms are produced by the reaction of hydrogen ion or ions heavier and of an appropriate target (14).the excited atoms are excited state, releasing gamma rays (15) which are scattered by the element (16) of interest in the subject. the scattered gamma rays are detected, and output signals are produced, processed and analysed, in order to determine the amount of the element of interest is present in the object (12).a preferred embodiment relates to the detection of the presence of nitrogen based explosives in luggage.