J Wang et al 1999 J. Phys.: Condens. Matter 11 3973 doi:10.1088/0953-8984/11/20/304
J Wang, Richard J Mathar, S B Trickey and John R Sabin
Show affiliationsTreatment of electronic stopping via kinetic theory and the orbital local plasma approximation is extended (from free-standing ordered slabs) to include bulk crystalline targets, and hence probe their electron momentum distribution. Sensitive computational issues, important for comparison with experimental data, are addressed. A primary result is unambiguous first-principles prediction of large gas-solid and film-solid differences in Li stopping. Previous predictions had involved semi-empirical determination of mean excitation energies. Additionally, a stopping anisotropy that is separate from and much smaller than familiar channelling and related to the familiar Compton-profile anisotropy is treated, apparently for the first time. Example calculations for hexagonal Li and graphite are given.
61.85.+p Channeling phenomena (blocking, energy loss, etc.)
61.50.Ah Theory of crystal structure, crystal symmetry; calculations and modeling
Condensed matter: electrical, magnetic and optical
Issue 20 (24 May 1999)
Received 15 October 1998, in final form 9 February 1999
J Wang et al 1999 J. Phys.: Condens. Matter 11 3973
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