MEASUREMENTS OF L(1), L-ALPHA, L-BETA AND L-GAMMA X-RAY-FLUORESCENCE CROSS-SECTIONS IN HEAVY-ELEMENTS EXCITED BY 36.62, 43.69, 48.30, 50.20 AND 53.50 KEV PHOTONS

L1, Lalpha, Lbeta and Lgamma x-ray fluorescence cross-sections were measured in Au and Pb at excitation energies of 36.62, 43.69, 48.30, 50.20 and 53.50 keV. Measurements were made using an x-ray tube with a secondary exciter system as the excitation source. The x-ray tube with a secondary target arrangement was used to obtain high intensity with a high degree of monochromatization. By using an x-ray tube it is possible to measure L x-ray fluorescence cross-sections even for low-intensity x-rays (L1). The experimental results were compared with the theoretically calculated values of L x-ray fluorescence cross-sections and a fairly good correspondence was observed.