METHOD OF DETECTING AND IDENTIFYING CONCEALED DANGEROUS OBJECTS Russian patent published in 2011 - IPC G01N23/222 

FIELD: physics.

SUBSTANCE: stream of hydrogen nuclides is generated and modulated. Said nuclides are accelerated to a target where neutrons are generated. The inspected object is irradiated with neutrons. Gamma-ray quanta of the radiation capture or inelastic scattering are picked up and the arrival time of gamma-ray pulses with given energy distribution which corresponds to nuclei of elements making up a dangerous substance at the detector is recorded. The direction of flow of the accelerated hydrogen nuclides relative the initial direction is changed on the vertical and then on the horizontal. Detection of gamma-ray quanta and recording their arrival time at the detector is carried out after each measurement of the direction of the axis of symmetry of the neutron stream. Further, spatial coordinates of the unknown object in Cartesian coordinate system is determined using a corresponding system of equations.

EFFECT: rapid and easy measurement.