Optically Forbidden Excitations of 2s Electron of Neon Studied by Fast Electron Impact

  • Received Date: March 27, 2008
  • Published Date: September 30, 2008
  • The electron energy loss spectrum in the energy region of 42--48.5eV of neon is measured with an angle-resolved fast-electron energy-loss spectrometer at an incident electron energy of 2500eV. Besides the dipole-allowed autoionization transitions of 2s-1np(n=3,4) and 2p-23s3p, the dipole-forbidden ones of 2s-1ns(n=3-6) and 2-13d are observed. The line profile parameters, i.e. Er, Γ and q for these transitions, are determined, and the momentum transfer dependence behaviour is discussed.
  • Article Text

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