The interaction of an electron entering the solid with the constituent atoms
is due to the electrostatic forces. As a result of this interaction the
may be scattered, that is the direction of its momentum may be changed with
some amount of energy transferred to the specimen.
It is convenient to divide scattering processes into two broad categories:
elastic and inelastic. Data on both kinds of scattering are included
in this archive:
Elastic scattering is represented by dependences of
differential and total cross sections on incident electron energy
for elements with atomic numbers from 1 to 103. The cross sections were
calculated by Leonid Bakaleinikov and Yuri Polovko
on the basis of Mott's representation.
Inelastic scattering is represented by dependences of
inelastic interaction probabilities on incident electron energy and energy
loss for solids of several compositions. The probabilities were calculated
by Leonid Bakaleinikov and Ekaterina Flegontova according
to the dielectric formulation from optical data.
The elastic scattering is an essentially Coulomb interaction with an
screened by the atomic electrons. In a gas or (to some extent) in an amorphous
solid, the constituent atoms can be regarded as independent electron scatterers.
In a crystalline solid, the interference between the
scattered electron waves should, generally speaking, be taken into account.
The elastic scattering is then reffered to as diffraction. The necessity
for taking into account the diffraction effects is not related solely to
the energy region but also to what information one tries to get.
Inelastic scattering occurs as a result of Coulomb interaction between
incident electron and the atomic electrons. The inelastic scattering
may not only lead to a single-electron excitation but involve many atoms
of the solid (plasmon excitation).
Therefore, it is convenient to represent
the inelastic scattering properties of solids on per-unit-length basis (instead
of per-unit-atom basis in the case of elastic scattering).
Leonid Bakaleinikov for any questions, comments and suggestions
concerning the contents and presentation of the archive.
If you find the archive helpful and use the presented data
in your research, the authors would appreciate acknowledging
that in your papers.
Creation of this archive was partially funded by
the Russian Foundation for
Basic Research (grant No. 96-07-89305).
Created: December 22, 1998
Last updated: February 28, 2002