Fullerite C60 optical constants in the C 1s NEXAFS region

Using data on the absorption cross sections the refraction coefficient spectral dependence n E and the spectra of the remaining optical coefficients reflection coefficient, phase shift, and atomic form factor in the fullerite C60 C 1s near edge X ray absorption fine structure NEXAFS region 280 350 eV were determined. For the n E calculations the Kramers Kronig integral relations KKRs were used. The KKR computations were performed using data on atomic carbon absorption cross sections in the 10 30000 eV range and on solid and gaseous C60 in the 0 120 eV. Absorption cross section spectrum in the fullerite C60 C 1s NEXAFS region were measure