Computer Simulation of Ion-Solid Interactions by Wolfgang Eckstein PDF

By Wolfgang Eckstein

ISBN-10: 3642735134

ISBN-13: 9783642735134

ISBN-10: 3642735150

ISBN-13: 9783642735158

In this e-book the writer discusses the research of ion bombardment of solids through computing device simulation, with the purpose of demonstrating the usefulness of this method of the matter of interactions of ions with solids. a few of the chapters current the elemental physics in the back of the simulation courses, their constitution and lots of functions to assorted subject matters. the 2 major streams, the binary collision version and the classical dynamics version, are mentioned, as are interplay potentials and digital power losses. the most themes investigated are backscattering, sputtering and implantation for incident atomic debris with energies from the eV to the MeV diversity. an intensive review of the literature is given, making this publication of curiosity to the lively reseacher in addition to scholars getting into the field.

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For the Moliere potential, the dependence of the distance of closest approach on the impact parameter for several reduced energies e is shown in Fig. 8a, which may serve to 21 find a good approximation for R to speed up the calculation. 3), the curves for the distance of closest approach look quite different, especially at low € values, see Fig. 8b. The exact trajectories determined by solving Newton's equations illustrate the different behaviour originating from purely repulsive potentials and those potentials with an attractive part.

This is another indication that the binary collision approximation is not on solid ground at energies below about 10 eV. 7]. 16. J < ;::: z UJ a:: la' UJ u.. u.. 24-26] in some detail with the conclusion that in all comparisons too simple BCA programs were used which neglected simultaneous collisions. 27] showed reasonably good agreement for the number of Frenkel pairs produced. Excessively long collision sequences occurred with MARLOWE only if the bulk binding energy Eb was chosen to be zero. 32].

7) are shorter than the nearest-neighbour distance in the crystal. If we restrict ourselves for the moment to the equal mass case, A = 1, then the important values for the determination of Xlp and X2 are the time integral T and ptan(J/2). 8 ,,,- E, Ie = 10 I ~ I .... 1·0 /. _. 1 o 10 o ;;. ,. , . . - - - - - - ~. ;::: -I 40 -5. 14a,b. Time integral T and the value p tan J12 in units of the screening length vs the scattering angle J in the centre-of-mass system for several reduced energies, ~ = EriC.

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Computer Simulation of Ion-Solid Interactions by Wolfgang Eckstein

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