Natural FWHM

 

Natural FWHM of Element (spin-orbit) ???

 

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Total FWHM = (FWHM_x-ray² + FWHM_{hemi-sphere broadening}² + FWHM_element² )^1/2

Energy (Wavelength) Spreads

 

 

 

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FWHM_{x-ray spread                                          0.16 – 0.21 eV} 

_{FWHM (Lorentzian)}

 

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Shape of X-ray Energy Distribution ( λ)  is 100% Lorentzian

 

 

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Shape of Emitted Photo-Electron Energy Distribution is 100% Lorentzian

(?? eV)

 

 

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Energy Spread (Distribution) due to Electron Energy Analyzer is 0.25 eV   (100% Gaussian)

 

FWHM_{hemi-sphere broadening} <0.25eV

 

Characterisation of the VG ESCALAB 220i-XL instrumental broadening functions by XPS measurements at the Fermi edge of silver

 

 

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Natural FWHM of Ar 3p in gaseous state – UPS spectrum – not corrected for HSA or Source Spread

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Natural FWHM of Aluminum Al 2p using Synchrotron Radiation not corrected for HSA spread or X-ray spread

 

 

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