Spectral Angular Cross-section
"Spectral Angular Cross-section" is the cross-section for ejecting or scattering a particle into an elementary cone with energy $E$ in an energy interval, divided by the solid angle $d\Omega$ of that cone and the range $dE$ of that interval.
Applicable units are those of quantitykind:SpectralAngularCrossSection
http://en.wikipedia.org/wiki/Cross_section_(physics)
$\sigma = \int \int \sigma_{\Omega,E} d\Omega dE$
http://www.iso.org/iso/catalogue_detail?csnumber=31895