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 C 60 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 C 60 – in the 0–120 eV. Absorption cross section spectrum in the fullerite C 60 C 1s NEXAFS region were measured.