Performance of PIXE technique at elemental analysis of halogens in charnockite

Proton Induced X-ray Emission is applied to the determination of F, Cl, Br and I in high grade metamorphic igneous rocks of halogen rich Charnockite composition. In this study, Chlorine, and Bromine halogen contents are found to well correlate and were determined in high grade metamorphic rocks because of within the Si (Li) detector limits of PIXE as 3 MeV. But for F and I in Charnockite, the fluorine with low X-ray energy and not detected in the present investigation due to detector limits, because the spectrum is started from element Chlorine. The next, iodine concentration is in the order of ppb range and resolution problem in matrix Charnockite composition by PIXE. (author)