Structure of the Steady State SGEMP Boundary Layer

When X rays illuminate a material surface they eject electrons backwards which then congregate in a relatively thin layer near the surface. We study the structure of this layer in the steady state limit in the cases in which the electron emission angular distribution is proportional to cos¿, where ¿ is the emission angle measured from normal, and when the electron energy distribution is either exponential or linear times exponential. These cases closely approximate the real world when the incident X-ray source has a blackbody spectrum.