Results for electron impact detachment of internally cold C n- and Aln- clusters are presented. The experiments were performed using an electrostatic ion beam trap fitted with an internal electron target. The measured electron impact detachment cross sections for the Cn- (n=1-9) clusters exhibit an even-odd oscillation, which is in agreement with the familiar even-odd variation in the binding energy, namely higher cross section for weaker binding. However, the cross sections increase on average with the cluster size, in spite of the average increase in the binding energy. We suggest, based on the data and on preliminary calculations, that the size dependent polarizability is the cause of this effect.
|Original language||American English|
|Number of pages||9|
|Journal||Institute of Physics Conference Series|
|State||Published - 2005|
|Event||Proceedings of the International Conference on Electron and Photon Impact Ionization and Related Topics 2004 - Louvain-la-Neuve, Belgium|
Duration: 1 Jul 2004 → 3 Jul 2004