SIZE-DEPENDENT CORE-LEVEL SPECTROSCOPY OF FREE NEUTRAL CLUSTERS

Studies of the electronic and geometric structure of free clusters are presented to highlight the application of core-level spectroscopy usi ng synchrotron radiation to cluster physics. The study of electronic s tructure deals with the excitation of the C Is electron to the Rydberg states of the molecule in CH4 clusters and demonstrates the gradual e volution of the surface and bulk-specific spectral features with clust er size. A second study investigates the K-edge excitations in Ne clus ters and is concerned with extracting structural information from the X-rays Absorption Near-Edge Structure (XANES).