RESONANT SOFT-X-RAY FLUORESCENCE-SPECTRA OF MOLECULES

A review is presented of some recent advancements in resonant soft X-r ay fluorescence spectroscopy applied to molecules. The concept of inel astic scattering is discussed for molecules with an element of symmetr y, which introduces degeneracy or near-degeneracy of core excited stat es. The potential of the symmetry selection rules associated with reso nant X-ray fluorescence is illustrated in studies of electronic struct ure as well as molecular dynamics. The use of polarized photons for ex citing X-ray emission is discussed, and examples are presented where a nisotropy of X-ray emission provides more detailed information. A brie f section discusses the experimental considerations relevant for the s pectroscopic technique.