2011/09/05 by J. Marbach, Marbach, J., F. X. Bronold +3
Physics and Astronomy · #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Other Condensed Matter (cond-mat.other) #cond-mat.other #physics.atom-ph
paper · pdf · doi:10.48550/arxiv.1109.0845
4 pages, 3 figures, accepted contribution to ICPIG 2011, Belfast, UK
arxiv created 2011/09/06 · arxiv updated 2011/09/07
With an eye on plasma walls we investigate, within an effective model for the two active electrons involved in the process, secondary electron emission due to Auger de-excitation of metastable nitrogen N2(3σ+u) molecules at metallic surfaces. Modelling bound and unbound molecular states by a LCAO approach and a two-center Coulomb wave, respectively, and the metallic states by the eigenfunctions of a step potential we employ Keldysh Green's functions to calculate the secondary electron emission coefficient γe retaining for the Auger self-energy the non-locality in time and the dependence on the single particle quantum numbers. For the particular case of a tungsten surface we find good agreement with experimental data indicating that the relevant Auger physics is well captured by our easy-to-use model.