Electron energy-loss spectrum of methanol. observation of singlet-triplet transitions at low incident energy.

The electron energy-loss spectrum of methanol was measured at incident electron energies from 100 to threshold +2 eV. There were several intense bands assignable to the Rydberg transitions. Three singlet-triplet transitions were observed at 5.7–7.0, 7.3–7.6 and 8.8–9.5 eV at low incident electron energies.