Accession Number : AD0780431

Title :   Transport Theory for Heavy Ion Beams Near a Target Surface,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Mueller,G. P.

Report Date : 21 JUN 1974

Pagination or Media Count : 43

Abstract : The method of Manning and Padgett (MP) for studying the transport of heavy ion beams in amorphous solids is modified to allow for inelastic (electronics) slowing of the ion beam as well as elastic scattering. The beam ion distribution function consists of three terms with the following characteristics: a C-term, which represents the beam as it first enters the target, wherein it looses energy to inelastic processes but retains its unidirectional character; a B-term, which represents beam ions which have undergone one elastic collision; and an A-term representing beam ions which have undergone two or more elastic collisions. In the present work the exact solutions of the C- and B-portions of the Boltzmann equation are given. An iterative method for solving for the A-term is presented. The results of numerical calculations are reported for a variety of beam ions and beam energies. (Modified author abstract)

Descriptors :   *Amorphous materials, *Ion bombardment, Elastic scattering, Inelastic scattering, Distribution functions, Boltzmann equation, Transport properties

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE