Accession Number : AD0768981

Title :   Multiple Electron Scattering Through a Slab.

Descriptive Note : Research rept.,

Corporate Author : AVCO EVERETT RESEARCH LAB INC EVERETT MASS

Personal Author(s) : Jacob,J. H.

Report Date : MAY 1973

Pagination or Media Count : 41

Abstract : The transport equation for electron scattering through plane parallel targets has been solved by expanding the electron distribution function into spherical harmonics. The electron energy is assumed to be constant. No simplifying assumptions have been made concerning the scattering cross-sections. In fact, a simple technique has been found for accurately determining the screening angle which plays an important role in multiple scattering. For small angles (= or < 10 degrees) and thin targets, the emerging electron distribution agrees well with earlier theories. However, for larger angles the present theory predicts a greater probability of scattering than earlier theoreis. For thin targets it is well known that the earlier theories emerge with the single scattering distribution function at large angles. This difference at large angles between the present and earlier theories implies implies that the electron distribution predicted by the present calculations will not merge with the single scattering distribution. For thick targets, as one would expect, the earlier theories are poor approximations of the emergent electron distribution function of all angles. (Author)

Descriptors :   (*STATISTICAL MECHANICS, ELECTRONS), ELECTRON DENSITY, DISTRIBUTION FUNCTIONS, PARTIAL DIFFERENTIAL EQUATIONS, GRAPHICS

Subject Categories : Physical Chemistry
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE