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Average Electronic Energy Loss in the Modified Firsov Theory
Author(s) -
Latta B. M.,
Scanlon P. J.
Publication year - 1976
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220740233
Subject(s) - stopping power , atom (system on chip) , atomic physics , ion , electron , atomic number , line (geometry) , function (biology) , physics , mathematics , quantum mechanics , computer science , geometry , evolutionary biology , biology , embedded system
Calculations of the average electronic stopping power S e for heavy ions in solids are performed within the framework of the modified Firsov theory. Consideration is given to the effect of the usual approximations of straight line trajectories, free‐atom electron densities, and the positioning of the dividing surface between the atoms at a fixed fraction of their separation. When S e is averaged over all impact parameters, for classical orbits, the variation of S e as a function of target atomic number Z 2 is much smaller than the variation previously determined by other authors for forward‐scattered particles. The use of a simple approximation for the electron densities in solids, in conjunction with a Thomas‐Fermi estimate of their velocities during the interaction, leads to results that are very similar to the free‐atom case.