PUZZLING DIATOMIC FEATURES SOLVED BY LASER-SPECTROSCOPY

Despite a resolution of 500 000, conventional (grating) spectroscopy failed in providing a satisfactory interpretation of the visible spectra of NbN and, above all, NbO. Laser spectroscopy techniques, from broad-band LIF up to sub-Doppler intermodulated LIF, were successfully used in order to understand these spectra. The main results are the observation of a case (a) coupling in the X4Σ- ground state of NbO and peculiar spin-uncoupling effects in the red system of NbN

Electronic structure and screening dynamics of ethene on single domain Si(001) from resonant inelastic X-ray scattering.

We present a resonant inelastic x-ray scattering ~RIXS! study of a strongly bound adsorbate on a semiconductor surface, C2H4 /Si(001). The valence electronic structure as well as the photon energy dependence in RIXS can be studied without the dominating effect of dynamic metallic screening. We demonstrate that for this strongly coupled system the RIXS spectrum resulting from a selective excitation into the unoccupied s CSi * resonance can be interpreted with the help of density-functional calculations. In addition, we show how excitation into different resonances leads to a significant photon energy dependence of the RIXS spectral features, not seen in strongly coupled adsorbate systems on metals

Journal of Molecular Spectroscopy

The Journal of Molecular Spectroscopy presents experimental and theoretical articles on all subjects relevant to molecular spectroscopy and its modern applications. An international medium for the publication of some of the most significant research in the field, the Journal of Molecular Spectroscopy is an invaluable resource for astrophysicists, chemists, physicists, engineers, and others involved in molecular spectroscopy research and practice