Measurement of relative L X-ray intensity ratio following radioactive decay and photoionization

The measurements of the L   X-ray intensity ratio I(Lα)/I(Lβ)$I(L\alpha )/I(L\beta )$, I(Lα)/I(Lγ)$I(L\alpha )/I(L\gamma )$, I(Lα)/I(Lι)$I(L\alpha )/I(L\iota )$, I(Lβ)/I(Lγ)$I(L\beta )/I(L\gamma )$ and I(Lι)/I(Lγ)$I(L\iota )/I(L\gamma )$ for elements Dy, Ho, Yb, W, Hg, Tl and Pb were experimentally determined both by photon excitation, in which 59.5 keV γ-rays from a filtered radioisotope ²⁴¹Am was used, and by the radioactive decay of ¹⁶⁰Tb, ¹⁶⁰Er, ¹⁷³Lu, ¹⁸²Re, ²⁰¹Tl, ²⁰³Pb and ²⁰⁷Bi. L   X-rays emitted by samples were counted by a Si(Li) detector with resolution 160 eV at 5.9 keV. Obtained values were compared with the calculated theoretical values. Theoretical values of the I(Lα/Lβ)$I(L\alpha /L\beta )$, I(Lα/Lγ)$I(L\alpha /L\gamma )$, I(Lα/Lι)$I(L\alpha /L\iota )$, I(Lβ/Lγ)$I(L\beta /L\gamma )$ and I(Lι/Lγ)$I(L\iota /L\gamma )$ intensity ratios were calculated using theoretically tabulated values of subshell photoionization cross-section, fluorescence yield, fractional X-ray emission rates, Coster–Kronig transition probabilities. It was observed that present values agree with previous theoretical and other available experimental results.