The presence of a spin-orbit term in the scattering potential introduces a spin dependence in the scattering cross section.
2.
For a radially symmetric scattering potential, as in the case of the Coulomb potential, d \ Omega = 2 \ pi \ sin { \ Theta } d \ Theta, yielding the expression for the scattering cross section
3.
This sum is denoted by the complex amplitude F in the equation below, because it is also the Fourier transform ( as a function of spatial frequency or reciprocal distance ) of an effective scattering potential in direct space:
4.
HeSE has been used to construct empirical helium-surface scattering potentials through the measurement of selective adsorption resonances ( bound state resonances ) on the clean LiF ( 001 ) surface and the hydrogenated Si ( 111 ) surface.
5.
A common approach in LEED calculations is to describe the scattering potential of the crystal by a " muffin tin " model, where the crystal potential can be imagined being divided up by non-overlapping spheres centered at each atom such that the potential has a spherically symmetric form inside the spheres and is constant everywhere else.
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