Electron scattering cross sections

Since the nuclear and electronic scattering cross sections for alpha particles are well known, the relative concentrations of the elements and their depth profiles can be easily obtained. The relative element concentrations are determined by the relative scattering intensities. The depth profile is obtained from the energy spread of the scattered particles, which lose energy before and after the nuclear collision, by inelastic scattering with electrons. The knowledge of the elements areal density and of the film thickness allows the determination of film density. 

Eq. (11.30) is strictly applicable only to elastic collisions, in which a = a, and is thus of limited utility. However, it is physically appealing to assume that the cross section o(a, a, / ,/ ) for an inelastic process a = a and ft (i can be written as the integral of the electron scattering cross section oe(J3, f, q) over the velocity distribution of the Rydberg electron in the initial state a. Making this notion explicit, we write19... 

Szmytkowski, C. and Zubek, M. (1978). Absolute total electron scattering cross section of CO, CO2 and OCS in the low energy region. Chem Phys. Lett. 57 105-108. 

Resonance and threshold structures in fixed-nuclei electron-scattering cross sections are replicated, with characteristic energy shifts, in rovibrational excitation... 

Lepage M, Michaud M, Sanche L (2000) Low-energy electron scattering cross section for the production of CO within condensed acetone. J Chem Phys 113 3602-3608... 

Figure 10.Continuum MS> Xa elastic electron scattering cross sections for SiH4, total and by symmetry of continuum electron (from ref. 10).

M.-L. Xu, B.M. Hall, S.Y. Tong, M. Rocca, H. Ibach, S. Lehwald J.E. Black (1985). Phys. Rev. Lett., 54, 1171-1174. Energy dependence of inelastic electron scattering cross section by surface vibrations experimental measurement and theoretical interpretation. 

Figure 14.1 Inelastic electron scattering cross section of water as a function of eiec-tron kinetic energy over the energy range relevant to XPS. (The data are taken from Schutten et a. ( ), Ref. [16] Djuric et al. (A), Ref [17] Straub et al. (x), Ref. [18] ...

FIGURE 1 Ionization cross section o-/(e) for N2 and SFe close to the ionization onset /. Electron-scattering cross section as a function of e for N2 and electron-attachment cross section cra(s) for SF0. Normalized electron energy distribution function E/N) as a function of s for N2 at two values of E/N. [From Christophorou, L. G., et al. 

The electron drift velocity w (or y or yN) has since been found to decrease slowly (e.g., for H2, N2, 2 6 3 8 other species with small electron scattering cross sections) or to decrease strongly (e.g., for He, C02> l-C F for which permanent or transient anions are formed as N increases and for polar media for which the electron scattering cross section is large due to the electron-electric dipole interaction) with... 

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