Abstract (eng)
Proton induced gamma-emission (PIGE) is a non-destructive, isotope-sensitive analytical technique to determine the elemental composition of target samples. The PIGE method is based on the determination of gamma-lines from reactions, which depend on the incident proton energy and the isotope of the element in the target. Generally, PIGE is an ideal complementary technique to proton induced X-ray emission (PIXE) analysis, because it is mainly used to determine light element concentrations not detectable with PIXE. Therefore, the existing PIXE-ART facility was extended by establishing a PIGE setup. The shielding of the proton induced gamma-ray background in construction materials comes out to be difficult. A reduction was possible due to purposeful modifications, especially the mounting of a new collimator system. It is intended to analyze primarily art objects by investigation of light element concentrations which can be detected well by PIGE. For that purpose calibration lines for fluorine, lithium, aluminum, sodium and boron were determined by use of reference materials. The present PIGE setup, in combination with a 3 MeV proton beam (proton current in order of some nA), allows to measure the concentrations of F, Li, Al, Na and B in the range of mg per g with uncertainties of 6-24%.