In-sample scattering contribution of fluorescent radiation to the X-ra
y fluorescence line intensity were studied in thick, pure samples. The
Compton peak/photopeak area ratios for pure elements Cu, Zr, Ag, Sn,
Ba, Gd, Dy and Yb were determined as a function of characteristic X-ra
y energy and sample thickness for annular-shaped Am-241 isotope excita
tion. The results show that the contribution of scattering is within 2
-15% of the primary fluorescence. The results were compared with theor
etical results.