1. PHYSICAL ASPECTS OF IONIZATION SPECTROSCOPY TECHNIQUE

• 1.1. The nature of ionization spectra
• 1.2. The role of elastic scattering in ionization spectrum formation for reflection geometry
• 1.3. Inelastic electron scattering
• 1.4. IL contour
• 1.5. Fine structure of ionization spectrum
• 1.6. Ionization losses
• 1.7. Opportunities of ionization spectroscopy

The IL electrons energy distribution (the real shape of IL) is called the contour of ionization line. Strictly speaking it spreads in the region from zero to Ep-Ec. The IL contour is proportional to the convolution type integral

(1.4.1)

where - is the density of electron states on the core level, - density of empty states, Pif – probability of transition. Usually, the core level is narrower than the empty states continuum. Therefore, assumes for simplification that the core level density of states is representable by delta function , then

(1.4.2)

and the number of electrons NIL(E) turns out to be proprtional to the density of empty states, which is used for practical estimates of .

Look further: 1.5. Fine structure of ionization spectrum