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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-24 22:07 |
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Conference: Bucharest University Faculty of Physics 2010 Meeting
Section: Atomic and Molecular Physics; Astrophysics
Title:
Theory of inelastic scattering of He atoms on a graphite surface model
Authors:
Gergely Kosa, Mircea Bercu, Voicu V. Grecu
Affiliation:
University of Bucharest, Faculty of Physics, Atomistilor 405, Bucharest-Magurele, Romania
E-mail
dolomynum@gmail.com
Keywords:
inelastic scattering graphite
Abstract:
Molecular dynamics were used to simulate the inelastic scattering of He atoms on different graphite surface models containing from one up to six atomic planes. Statistics of millions of collisions were analyzed versus the polar and azimuthal scattering angle corresponding to a fixed value of energy (3-10 eV) and direction (20-35 degrees) of the incident He atom. The energy exchange from the projectile to the graphite has been analised versus the depth in to the target. The interatomic C-C and He-C interactions were calculated using a modified Morse potential already used successfully for simulating carbon nanotube and graphene systems. The parameters of the surface model were re-calibrated in order to yield results comparable to real experiments.
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