POLARIZED VBXES AND XANES OF GASXSE1-X(X=0, 0.6, 1)

Polarized K-emission and absorption spectra of the layered compounds GaSxSe1-x (x = 0, 0.6, 1) are measured in the range of about 10 eV below and above the gap. The polarization dependence of the spectra enables the investigation of the local p-like DOS additionally resolved with respect to the m-quantum number symmetry. By alignment of the energy scales using XPS core orbital energies the experimental spectra can be compared with calculated local partial (l, m-resolved) DOS after Robertson. The spectra are discussed with regard to the calculated DOS and to the structure of the compounds. The polarization dependence of the gap between the Ga K-emission and absorption spectra show's the anisotropic character of chemical binding.