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(Lα), I(Lβ)/I(Lα) and I(Lγ)/I(Lα) 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 ILβ/ILα are in good agreement with the theoretical values.