Collision induced dissociation of stored gold cluster ions
Abstract
The stability of gold cluster ions Au{/n +} (2≦ n≦23) has been investigated via collision induced dissociation in a Penning trap. Threshold energies and dissociation channels have been determined. The cluster stability exhibits a pronounced odd — even alternation: Clusters with an odd number of atoms, n, are more stable than the even-numbered ones. Enhanced stabilities are found for Au{3/+}, Au{9/+}, and Au{19/+} in accordance with the Clemenger-Nilsson and the deformed jellium model of delocalized valence electrons. Excited odd cluster ions with n≦15 predominantly decay by evaporation of dimers; all others decay by monomer evaporation. From the dissociation channels estimates of the binding energies are deduced.
- Publication:
-
Zeitschrift fur Physik D Atoms Molecules Clusters
- Pub Date:
- December 1994
- DOI:
- 10.1007/BF01426399
- Bibcode:
- 1994ZPhyD..30..341B
- Keywords:
-
- 36.40.+d;
- 34.50.−
- s;
- 35.20.Gs