Second Generation Analytical Photo-Compton Current Methods

Analytical transport methods have been developed to predict photo-Compton currents (PCC) in many geometries. This paper presents the "second generation" status of these methods including: (1) a method of determining the azimuthal in addition to the polar angular dependence; (2) an extension to higher order expansions which more accurately predict angular distributions; (3) more accurate back yields of low atomic number materials at high photon energies; and (4) more accurate electron scattering cross sections. The analytical methods have now evolved to the point that almost any quantity associated with vacuum photoemission can generally be calculated to within 20% agreement with Monte Carlo predictions and experimental data.