The vibrational and rotational states of metal dimers sputtered by keV ion impact were studied by a molecular dynamics simulation. Particular emphasis was put on the role of dimers originating from unimolecular decomposition of large unstable ejected clusters. It is seen that the contribution of these so called "secondary" dimers to the total dimer yield is non-negligible. In addition, secondary dimers are shown to be "cold" compared to "primary" dimers identified immediately after the sputtering event. Hence, the calculated vibrational and rotational temperatures are lowered if secondary fragmentation products are included into the treatment.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics