ANGLE-RESOLVED SOFT-X-RAY FLUORESCENCE AND ABSORPTION STUDY OF GRAPHITE

The x-ray fluorescence and absorption of highly oriented pyrolytic gra phite have been measured using monochromatic synchrotron radiation. Th e spectra can be separated into contributions from pi- and sigma-band components by measuring at different angles of incidence and at differ ent emission angles. The shape of the x-ray fluorescence spectra varie s dramatically with excitation energy near the C K edge. This dependen ce on excitation energy can be interpreted within a resonant-inelastic -scattering formalism. The results are compared with previously publis hed band-structure calculations and photoemission results, and demonst rate the potential for using x-ray fluorescence to obtain symmetry-res olved band information.