Sputtering of silver dimers: a molecular dynamics calculation using a many-body embedded-atom potential

摘要: The ejection of neutral Ag atoms and Ag2 dimers under 1 keV Ar+-bombardment (111)-, (110)- (100)-silver surfaces was studied by a molecular dynamics simulation using many-body embedded-atom method (EAM) interaction potential. absolute dimer yields YAg2 as well the translational internal energy distributions were calculated EAM potential for description both solid isolated dimer. Significant differences found between obtained different crystal faces which, however, do not agree with results previous studies additive pair potentials. dimers, averaged over three faces, show good agreement corresponding experimental data polycrystalline silver surface. state sputtered molecules can be fitted thermal populations revealing vibrational rotational temperatures 4200–5800 K 8500–12300 K, respectively, (110)-surface always producing highest (111)-surface lowest temperatures.