Resonant and non-resonant X-ray scattering from C 70

Abstract

Resonant and non-resonant X-ray scattering spectra of the C 70 molecule are presented and analyzed by ab initio Hartree-Fock calculations using a newly developed formalism for symmetry selective inelastic X-ray scattering. Compared to C 60, a weak excitation energy dependence of the spectra features is observed. The change from ‘soccer-ball’ (I h) to ‘rugby-ball’ (D 5h) shapes leads to less symmetry selectivity but larrger polarization selectivity. In contrast to C 60, the RIXS spectrum of C 70 molecule is dense even for narrow-band excitation.