On the Influence of Distance Between Spectrometer and Sample on the X-Ray Fluorescence Intensity
The expressions for the focal spot extreme points coordinates of X-ray tube and the detector takeoff area used for the determination of analyzed sample zone were found. The dependence of X-ray fluorescence intensity from the distance between the spectrometer and sample was studied. The intensity of spectral line <i>Fe-K</i><sub><i>a</i></sub><i> </i>in iron-bearing materials at the different geometric conditions of spectrometer was calculated. It was found that the distance between the spectrometer and sample, at this the maximum of measured intensity is observed, is influenced on the size and position of X-ray tube and detector collimators, the positional relationship of X-ray tube and detector. The recommendations for the achievement of maximal X-ray fluorescence intensity were done. The results obtained could be used for the development of X-ray fluorescence analysis techniques of loose materials directly in technological production line.