L-SHELL X-RAY-INTENSITY RATIOS FOR AU AND PB AT EXCITATION-ENERGIES 36.82, 43.95, 48.60, 50.20 AND 53.50 KEV

The L-shell X-ray intensity ratios I(L1)/I(Lalpha), I(Lbeta)/I(Lalpha) and I(Lgamma)/I(Lalpha) for Au and Pb have been measured at the excitation energies 36.82, 43.95, 48.60, 50.20 and 53.50 keV with a HP Ge(Li) detector. Measurements have been performed 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 high degree of monochromatisation. A comparison is made of the experimental results with the calculated values obtained by using theoretical X-ray emission rates, sub shell ionisation cross-sections sub shell fluorescence yields and Coster-Kronig transition probabilities. A fairly good agreement is observed between experimental and theoretical values. The intensity ratios for intense transitions I(Lbeta)/I(Lalpha) are in good agreement with the theoretical values.