Abstract
Atomic x-ray absorption of cadmium in the energy region of $L$ edges was measured on the vapor of the element, in parallel with the absorption of Cd metal foil. Ionization thresholds of the three subshells are determined from the edge profiles, through the energies of pre-edge resonances and indium optical levels in the $Z$ + 1 approximation. A purely experimental result, without extraneous data and with an accuracy of 0.2 eV, is the energy difference between the pre-edge resonance and the threshold energy of the metallic state. Some multielectron-excitation resonances are identified within 30 eV above the edges. The metal foil absorption is used for absolute determination of Cd absorption coefficient.
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