The relationship for the conservation of energy in the photoelectron process is given by Eq. (1): hv = ϕsp + Eb + Ek (1) where hv is the proton energy, ϕsp the spectrometer
work function, and Eb and Ek represent the binding energy and kinetic energy of the ejected electron. To measure accurately the binding energy, Eb, of an electron, it is necessary to know the instrumental work function, the energy of the
exciting source, and the kinetic energy of the ejected electron. In most cases hv and ϕsp are accurately known. Ek is determined with an electron energy analyzer. The analyzers in common use today determine Ek by electrostatic or magnetic
dispersion. The McPherson ESCA-36 uses a spherical section, nonretarding potential electrostatic analyzer for which the following relation holds when relativistic effects are neglected: Ek = KeV (2) where K = 2r/d
In the above equation V is the potential difference between the spheres, K is instrument constant, r the mean radius of the spheres, e the electron charge, and d the sphere separation.
Department of Chemistry, University of Arizona, Tucson, Arizona 85721
Publication date: January 1, 1980
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