Abstract
With a high-resolution two-crystal vacuum spectrometer equipped with beryl crystals, the Zn L α emission spectra in fluorescence have been measured for Zn metal, ZnO, cubic ZnS, hexagonal ZnS, ZnF 2 , ZnCl 2 , ZnBr 2 , ZnP 2 and Zn 3 P 2 . The emission spectra consist of a prominent peak L α 1,2 and its high-energy structure, and are quite alike. The high-energy structure is primarily ascribed to the satellites as a result of multiple ionizations. The chemical shift is observed for the L α 1,2 peak: The energy position of the L α 1,2 peak is shifted toward lower energies with increasing the ionicity of the zinc compounds. The measured Zn L α emission spectra are compared with available XPS, UPS and X-ray valence-band emission spectra and theoretical energy-band calculations on a common energy scale. It is shown that considerable p - d mixing occurs in the their valence band.
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