Spatial aspects of low‐ and medium‐energy electron degradation in N2

Spatial (radial and longitudinal) yield spectra for electron energy degradation in molecular nitrogen gas for 25‐eV to 10‐keV incident electrons have been generated by using a Monte Carlo technique. These spatial yield spectra associated with the electron degradation process can be employed to calculate a ‘yield’ for any inelastic state at any position in the medium. These have been analytically represented in terms of a model containing three simple ‘microplumes.’ Five‐dimensional yield spectra which contain the information about the polar angle of the electron have also been analytically represented within the framework of the microplume model. Aeronomical and radiological applications of our model are discussed.