MEETHOD FOR DETECTION OF EXPLOSIVE IN INSPECTED SUBJECT Russian patent published in 2005 - IPC

FIELD: detection of explosive in inspected subject.

SUBSTANCE: a camera provided with a radiation protection is irradiated by thermal neutrons, and at least by one detector of gamma-radiation, gamma-radiation is regustered by transformation of gamma quantums into electric pulses and comparison of their amplitudes with the threshold values, energy spectrum of gamma-radiation is determined at least within the interval of the energy of gamma-quantume, including the upper limit of the values of the energy of gamma-quantums emitted at interaction with thermal neutrons atom nucleus at least of one chemical element in composition of the materials of the chamber, radiation protection or detector of gamma radiation, the point of the maximum and the point of the decrease of the energy spectrum in the mentioned intervals of energy are determined, the amplitudes of the electric pulses are determined from gamma-quantums with energies corresponding to the energies of the points of maximum a decrease, corresponding to the energies of the points of maximum and decrease, ratings. Then the subject under inspection is placed in the chamber, the subject under inspection is irradiated by thermal neutrons, the gamma-radiation is registered, the lower and upper threshold values are determined, and a decision is taken on presence of explosive in the subject under inspection at an excess of the threshold value.

EFFECT: reduced probabilities of omission of explosive and false alarm.

8 dwg