화학공학소재연구정보센터
Journal of Chemical Physics, Vol.105, No.17, 7448-7453, 1996
Resonant Vibrational-Excitation of Furan by Low-Energy-Electron Impact
Our purpose was to investigate the resonant vibrational excitation of furan (C4H4O) in its electronic ground state by electron collisions. The electron energy loss measurements have been carried out at intermediate and low impact energies for a scattering angle of 30 degrees, The spectra show peaks or groups of peaks corresponding to the excitation of the fundamental normal modes as also of the first harmonics and combinations. The energy dependence curve for the excitation of the C-H stretching vibrational modes is also reported for the impact energy range of 3-10 eV. It exhibits a broad structureless band with a maximum centered around 6 eV, which reveals an elicitation mechanism through the intermediate of a shape resonance built on the electronic ground state of the neutral molecule. A comparison with benzene is made in order to help the analysis and to assign the nature : as well as the symmetry of the resonance.