X-ray Lα emission and L_IIIabsorption spectra of copper compounds

Abstract

The X-ray L~I, ~ emission spectra and LIII absorption spectra in Cu, CuzO, CuC1, CusS, CuO, CuCI~, CuS, CuF2 and Cu(en)~Cl2 are investigated. It is shown that the emission spectra of divalent copper compounds are considerably distorted due to a sharp absorption peak near the LIII edge. The nature of this peak is discussed and a relation is made with satellite peaks in X-ray photoelectron spectra.

L2,3x-ray absorption spectroscopy and multiplet calculations forKMFNadaï1, Demourgues2, Grannec3 et al. 2001Phys. Rev. B181100View full textAdd to dashboardCite

“…Considering that the ground state of Cu͑II͒ is represented by a linear combination of 3d 9 and 3d 10 L states (L: ligand hole͒, the excited state can only be assigned to a single 2p 5 3d 10 configuration as reported previously for divalent copper compounds such as CuO. 4,18 Hence, the peaks labeled A ͑Fig. 1͒ that are also observed for trivalent copper fluorides are relative to a 2p 5 3d 10 final state and indicate the presence of Cu͑II͒ in our samples.…”

Investigation of reactions between trace gases and functional CuO nanospheres and octahedrons using NEXAFS-TXM imaging

“…The Cu- L 2,3 -edge reveals that the spherical particles consist of a mixture of Cu + and Cu 2+ in an environment with a highly electronegative partner, like oxygen. The signals at ~931 and 950.9 eV are typical for Cu 2+ and the features at 933.8 and 953.6 eV can be assigned to Cu + , respectively 11 22 23 24 25 26 27 28 29 . The XRD pattern of the spherical particles after synthesis shown in Fig.…”

Cu 2p absorption spectroscopy as a probe for the site occupancy of (ZnxCu1−x)WO4 solid solution

“…It seems that the appearance of two Cu environments in the tungstate solid solution is specific to the substitution of Zn for Cu in the tungstate chain structure. Koster (1973) has mentioned that a shift to higher energies of the absorption peak reflects a decrease in ionicity and an increase in covalency. In this case the higher energy of the second peak indicates the presence of more covalent Cu-O bonds in the second site.…”