X-ray fluorescence analysis of low concentrations metals in geological samples and technological products

International Conference on Particle Physics and Astrophysics

Lagoida, I.A.^1 ; Trushin, A.V.^1

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe highway 31, Moscow

115409, Russia^1

关键词: Calibration coefficients;    Characteristic x rays;    Control measurements;    Intensity detection;    Low concentrations;    Processing industry;    Quantitative elemental analysis;    X ray fluorescence analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/675/4/042002/pdf
DOI  :  10.1088/1742-6596/675/4/042002

来源: IOP

【 摘 要 】

For the past several years many nuclear physics methods of quantitative elemental analysis have been designed. Many of these methods have applied in different devices which have become useful and effective instrument in many industrial laboratories. Methods of a matter structure analysis are based on the intensity detection of the X-ray radiation from the nuclei of elements which are excited by external X-ray source. The production of characteristic X-rays involves transitions of the orbital electrons of atoms in the target material between allowed orbits, or energy states, associated with ionization of the inner atomic shells. One of these methods is X-ray fluorescence analysis, which is widespread in metallurgical and processing industries and is used to identify and measure the concentration of the elements in ores and minerals on a conveyor belt. Samples of copper ore with known concentrations of elements, were taken from the Ural deposit. To excite the characteristic X-rays radionuclide sources109Cd, with half-life 461.4 days were used. After finding the calibration coefficients, control measurements of samples and averaging of overall samples were made. The measurement error did not exceed 3%.