Assertion: cross section | /r/HasProperty | calculated
Facets:
Source sentences:
text: The cross section can then be calculated, using the diffraction coefficients, with the physical theory of diffraction or other high frequency method, combined with physical optics to include the contributions from illuminated smooth surfaces and Fock calculations to calculate creeping waves circling around any smooth shadowed parts.
text: For the ionization cross sections of atoms in this database, cross sections for significant EA (usually electric-dipole and spin allowed excitations) have been calculated using the BE and E scalings discussed in Section C above, and the EA cross sections are included in the total ionization cross sections.