In the last decade in the search and exploration of deposits of non-ferrous, rare and noble metals intensively develops and finds wide application in the practice of geochemical prospecting X-ray radiometric method of analysis.
The increasing demand of the industry for ceramic raw materials leads to a sharp increase in their extraction. The increase in extraction implies an improvement in the quality of the raw materials supplied to the processing companies, which makes it possible to increase the economic efficiency of the industry.
The effective mass attenuation coefficients of gamma ray attenuation of radioactive ores have close values for the integral spectrum measured by the NaI(Tl) scintillator in a standard screen, and for the energy windows used in gamma-ray spectral logging and ore sampling ...
X-ray spectral determination of light elements is notoriously difficult due to the low fluorescence yield, X-ray absorption on the path from sample to detector, and insufficient resolution of the commonly used proportional counters ...
Continuous recording of equivalent contents of radioactive elements instead of registration of count rates in differential channels during gamma-spectral measurements allows to quickly obtain information on the distribution of elements in the studied object and simplify the processing and interpretation of results. This method is used for search gamma-spectral surveys in motion. We have used continuous recording of uranium (by radium) and thorium contents in gamma-spectral logging at the site of two-component uranium-thorium ores.
The electronic energy scale stabilization circuit is a device that monitors the photopeak of a gamma ray repeater. The basis of the scheme are two adjacent differential channels with the same window width, tuned, respectively, to the left and right branches of the photopeak of the reference source. At the output of both differential channels is placed a comparison circuit and an actuator...
The different spectral composition of gamma radiation of uranium and thorium ores determines the specificity of taking into account the attenuation of radiation in casing pipes and washing fluid when interpreting gamma-spectral logging diagrams.
Gamma-spectrometry is increasingly used in the sampling of uranium-thorium ores. It is based on measurements of pulse count rate in the optimal for uranium and thorium areas of the gamma-radiation spectrum. One of the main conditions ensuring high accuracy of sampling is the correct choice of gamma-spectrometer energy windows. This question arises most acutely at creation of spectrometric equipment with small size of scintillators in connection with low speed of counting of pulses in narrow energy windows, recommended usually in the literature.
