METHOD OF STABILIZING AN ENERGY SCALE WHEN DETERMINING BULK DENSITY AND EFFECTIVE ATOMIC NUMBER OF ROCKS BY GGC-LP METHOD Russian patent published in 2020 - IPC G01T1/40 

FIELD: mining.

SUBSTANCE: invention can be used for stabilization of gamma radiation detection path. Essence of invention consists in the fact that at stabilization of energy scale during determination of bulk density and efficient atomic number of rocks by GGC-LP method, scintillation gamma-ray detector is surrounded with compacted BaSO₄ powder with density of 0.1÷0.5 g/cm², opposite the collimator powder density BaSO₄ is less and is, for example, 0.05÷0.10 g/cm². A portion of the gamma radiation passing through the collimation window interacts with the barium found in BaSO₄ powder surrounding the detector. Barium characteristic radiation energy is equal to 32 keV. As a result, in addition to the peak in region of 32 keV, which is constantly present in the recorded spectrum, a peak with the same energy is added, intensity of which is proportional to intensity of gamma quanta in low-energy region. This enables to obtain, during measurements, a distinct peak in region of 32 keV to stabilize the energy scale irrespective of the intensity of gamma radiation passing through the collimation window.

EFFECT: high quality of stabilizing the energy scale of the spectrometer regardless of the power of the gamma-radiation sources for irradiating rocks and when examining rocks with low effective atomic number, which, in turn, improves accuracy of determining effective atomic number of rocks.

1 cl, 6 dwg