Lorentzian% – Excessive
Lorentzian % – Excessive
Example of excessive % of Lorentzian peak-shape. The Lorentzian tails extend far beyond actual data.
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Example of Lorentzian correctly used for Gas Phase XPS on a Beam line | ||
Gas phase spectra allow the true peak shape to be observed.
For gas phase the correct peak-shape depends mainly on the shape of the X-ray source which is Lorentzian. The collection lens and the hemi-sphere analyzer add a Gaussian peak-shape to the electron distribution as they fly through the lens and the HSA. The solid state induces a small change in the peak-shape. |
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