PHOTONUCLEAR DEVICE WITH COMBINED GAMMA-NEUTRON DETECTOR FOR DETECTION OF NUCLEAR MATERIALS

摘要

The solution relates to the analysis of materials by radiation methods, measuring the secondary emission when irradiated with bremsstrahlung and can be used for the detection of nuclear materials including fissionable substances screened contents analyzed objects (large marine containers, automobiles, railroad cars, buildings, etc. ) without opening them. The photonuclear apparatus comprising a source of bremsstrahlung radiation with a maximum energy greater than the threshold of photonuclear reactions, which records neutrons and gamma photons coming out of the nuclear material, to increase the sensitivity of detection of nuclear materials in hydrogen environments detection of neutrons and gamma photons produced combined gamma neutron detector, consisting (from the side of incidence of gamma-neutron radiation) of a layer of absorber of thermal neutrons, epithermal neutron absorber layer, Loy moderator of fast neutrons, thermal neutrons gas-meter, an organic scintillator layer, recording gamma-ray quanta, simultaneously performing the function of the neutron reflector for increasing the neutron detection efficiency. 8 ZP f BACKGROUND Table 2. 2 yl.