Satellite Structure for Valence Shell of Methane by Electron Momentum Spectroscopy

The first extensive electron momentum spectroscopy study of the satellite structure in the inner valence region of methane at 1200eV is reported. The experimental momentum profiles belonging to the (2a₁)^-1 satellite state are presented at energies 25.3, 28.5, 31.5, 35.5eV, and compared with the 146-G(CI) calculation.