X-ray Raman scattering study of aligned polyfluorene
  We present a non-resonant inelastic x-ray scattering study at the carbon K-edge on aligned poly[9,9-bis(2-ethylhexyl)-fluorene-2,7-diyl] and show that the x-ray Raman scattering technique can be used as a practical alternative to x-ray absorption measurements. We demonstrate that this novel method can be applied to studies on aligned $\pi$-conjugated polymers complementing diffraction and optical studies. Combining the experimental data and a very recently proposed theoretical scheme we demonstrate a unique property of x-ray Raman scattering by performing the symmetry decomposition on the density of unoccupied electronic states into $s$- and $p$-type symmetry contributions. 
S. Galambosi, M. Knaapila, J.A. Soininen, K. Nyg{\aa}rd, S. Huotari,   F. Galbrecht, U. Scherf, A.P. Monkman, K. H\"am\"al\"...