Abstract
The development of electronic states in krypton clusters is investigated by high-resolution core-level electron spectroscopy. The energy ordering of bulk versus surface core-excited states in neutral clusters is demonstrated to be reversed to the level situation. The cluster states are proven to be at a lower energy than the corresponding atomic levels. These findings reveal the ioniclike energy structure of the neutral cluster core-excited levels. The phenomenon is explained by a spatial spread of the excited orbitals over the cluster lattice.
- Received 21 March 2005
DOI:https://doi.org/10.1103/PhysRevA.72.021201
©2005 American Physical Society