IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/38198

Show full item record

Files Size Format View
abstract.gif 19.37Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
HfO_MSS.ppt 1.338Mb Microsoft PowerPoint View/Open
Slide1.GIF 50.30Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide2.GIF 12.03Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide3.GIF 10.87Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide4.GIF 32.47Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide5.GIF 7.250Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide6.GIF 13.20Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide7.GIF 11.61Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide8.GIF 9.647Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide9.GIF 13.13Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide10.GIF 7.935Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide11.GIF 14.07Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide12.GIF 7.500Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide13.GIF 7.306Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide14.GIF 9.101Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide15.GIF 7.632Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Slide16.GIF 8.726Kb GIF image Thumbnail of IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$

Title: IONIZATION ENERGY MEASUREMENTS AND SPECTROSCOPY OF HfO AND HfO$^+$
Creators: Merritt, J. M.; Bondybey, V. E.; Heaven, M. C.
Issue Date: 2009
Publisher: Ohio State University
Abstract: Rotationally resolved spectra of the HfO$^+$ cation have been recorded using the pulsed field ionization zero electron kinetic energy (PFI-ZEKE) technique. The $F(0^+)\leftarrow X^1\Sigma_g$ band system in HfO was resonantly excited to provide vibrational and rotational state selectivity in the two photon ionization process. Using the PFI-ZEKE technique a value of 7.91687(10) eV was determined for the ionization energy (IE) of HfO, 0.37 eV higher than the values reported previously using electron impact ionization measurements. Underestimation of the IE in the previous studies is attributed to ionization of thermally excited states. A progression in the HfO$^+$ stretching vibration up to $\nu^+$ = 4 was observed in the PFI-ZEKE spectrum, allowing for determination of the ground electronic state vibrational frequency of $\nu_e$ = 1017.7(10) cm$^{-1}$ and anharmonicity of $\omega_ex_e$ = 3.2(2) cm$^{-1}$. The rotational constant of HfO$^+$ was determined to be 0.403(5) cm$^{-1}$. Benchmark theoretical \emph{ab initio} calculations were carried out in order to explore the effects of electron correlation on the predicted molecular properties. Survey scans utilizing laser induced fluorescence and resonance enhanced multiphoton ionization detection revealed many previously unassigned bands in the region of the F-X and G-X bands of HfO, which we attribute to nominally forbidden singlet triplet transitions of HfO.
Description: Author Institution: Department of Chemistry, Emory University, \nobreak{Atlanta,} GA 30322
URI: http://hdl.handle.net/1811/38198
Other Identifiers: 2009-TJ-12
Bookmark and Share