FIELD: physics.
SUBSTANCE: pulsed neutron source is lowered onto the surface of an ore mass and activated; a radiation detector, previously shielded from neutrons, is then lowered at the same point and analytical radiation of the formed isotopes is detected, wherein a radiator, which is located in a protective collimator shield, which prevents direct action on the detectors, which jointly and simultaneously with the radiator are lowered onto a pre-levelled and bared assayed surface, and during operation of the pulse generator record spectra of gamma-radiation of inelastic scattering of fast neutrons, spectra of gamma-radiation of radiation capture of slow neutrons and the flux of scattered neutrons; at the end of the irradiation process, the collimator shield, along with the radiation source and detectors, is raised, moved and lowered such that the gamma-radiation detector is placed on the assayed surface which was exposed with maximum neutron flux density and spectra of gamma-radiation of the formed isotopes are recorded; the obtained measurement results are compared with results of similar measurements on a surface with known content of determined elements and having material composition which is averaged for the investigated object.
EFFECT: high quality of assaying mining and geological objects.
2 cl, 3 dwg
