dc.creator Ticknor, B. W. en_US dc.creator Wheeler, S. E. en_US dc.creator Allen, W. D. en_US dc.creator Schaefer, H. F., III en_US dc.creator Duncan, M. A. en_US dc.creator Belau, L. en_US dc.creator Ahmed, M. en_US dc.creator Leone, Stephen R. en_US dc.date.accessioned 2008-01-12T13:56:50Z dc.date.available 2008-01-12T13:56:50Z dc.date.issued 2007 en_US dc.identifier 2007-MJ-09 en_US dc.identifier.uri http://hdl.handle.net/1811/31446 dc.description Author Institution: Department of Chemistry, University of Georgia, Athens, GA 306025; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720} \author{S. R. LEONE; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 and Departments of Chemistry and Physics and Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 en_US dc.description.abstract New, higher resolution photoionization thresholds for neutral carbon clusters have been measured using tunable vacuum ultraviolet light at the Advanced Light Source (ALS). A laser ablation cluster source with a high repetition rate vaporization laser is coupled to the quasi-continuous light from the ALS. Ionized clusters are detected as a function of photon wavelength to determine the onset of ionization. Ionization thresholds for carbon clusters up to C$_{15}$ have been determined. Small changes in the cluster source have allowed for higher resolution measurements (0.05 eV step size) than previously reported for the smaller cluster sizes. These thresholds are compared to ionization potentials calculated from \emph{ab initio} methods (extrapolated CCSD(T) energies computed at cc-pVTZ ROCCSD(T) optimized geometries), which allows the investigation of isomeric structures in the molecular beam for some cluster sizes. Experiments are also ongoing at the University of Georgia to measure infrared spectroscopy of small carbon cation clusters in the gas phase, and any preliminary results will be presented. en_US dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title IONIZATION THRESHOLDS OF SMALL CARBON CLUSTERS: TUNABLE VUV EXPERIMENTS AND THEORY en_US dc.type article en_US
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