X-ray relative intensities at incident photon energies across the [formula omitted] ([formula omitted]) absorption edges of elements with [formula omitted

Abstract

The intensity ratios, ILk/ILα1 (k=l,η,α2,β1,β2,15,β3,β4,β5,7,β6,β9,10,γ1,5,γ6,8,γ2,3,γ4) and ILj/ILα (j=β,γ), have been evaluated at incident photon energies across the Li (i=1–3) absorption edge energies of all the elements with 35≤Z≤92. Use is made of what are currently considered to be more reliable theoretical data sets of different physical parameters, namely, the Li (i=1–3) sub-shell photoionization cross sections based on the relativistic Hartree–Fock–Slater (RHFS) model, the X-ray emission rates based on the Dirac–Fock model, and the fluorescence and Coster–Kronig yields based on the Dirac–Hartree–Slater model. In addition, the Lα1 X-ray production cross sections for different elements at various incident photon energies have been tabulated so as to facilitate the evaluation of production cross sections for different resolved L X-ray components from the tabulated intensity ratios. Further, to assist evaluation of the prominent (Li−Sj) (Sj=Mj, Nj and i=1–3, j=1–7) resonant Raman scattered (RRS) peak energies for an element at a given incident photon energy (below the Li sub-shell absorption edge), the neutral-atom electron binding energies based on the relaxed orbital RHFS calculations are also listed so as to enable identification of the RRS peaks, which can overlap with the fluorescent X-ray lines.