Electron Momentum Spectroscopy of Inner Valence Orbitals 3a1 and 2b2 of Methylene Fluoride

The electron momentum spectroscopy of the inner valence orbitals 3a1 and 2b2 of methylene fluoride was studied by electron momentum spectroscopy（EMS）. The experiment was performed using a high resolution（ΔE=1.15 eV FWHM，Δp=0. 1 a. u.）（e，2e）EMS spectrometer. The experimental momentum profiles of these two orbitals are compared with those calculated by Hartree-Fork method and Density Functional Theory.