Calibration of the McPherson ESCA-36 Photoelectron Spectrometer

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The relationship for the conservation of energy in the photoelectron process is given by Eq. (1):

hv = ϕsp + E b + E k     (1)

where hv is the proton energy, ϕsp the spectrometer work function, and E b and E k represent the binding energy and kinetic energy of the ejected electron. To measure accurately the binding energy, E b, 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. E k is determined with an electron energy analyzer. The analyzers in common use today determine E k 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:

E k = 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.

Keywords: Photoelectron spectroscopy

Document Type: Short Communication


Affiliations: Department of Chemistry, University of Arizona, Tucson, Arizona 85721

Publication date: January 1, 1980

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