Lorentzian% – Excessive
Lorentzian % – Excessive
| Example of excessive % of Lorentzian peak-shape. The Lorentzian tails extend far beyond actual data.
|
 |
|
|
|
||
|
|
||
| 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. |
 |
|