Ni? revisited: reassignment of the ground electronic state

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Publication Type Journal Article
School or College College of Science
Department Chemistry
Creator Morse, Michael David
Other Author Pinegar, Jacqueline C.; Langenberg, Jon D.; Arrington, Caleb, A.; Spain, Eileen M.
Title Ni? revisited: reassignment of the ground electronic state
Date 1994
Description Resonant two-photon ionization spectroscopy was used to study jet-cooled Ni2 produced by pulsed laser ablation of a nickel target in the throat of a supersonic nozzle using argon as the carrier gas. Spectral regions previously investigated using helium as the carrier gas were reinvestigated, and the improved cooling achieved was found to suppress transitions arising from an V54 state that had been thought to be the ground state. Seven new vibronic progressions were assigned, with spectroscopic constants determined for the excited states. The predissociation threshold in Ni2 was reinvestigated, and a revised value for the binding energy is given as D?(Ni2)=2.042?0.002 eV. The ionization energy of Ni2 was found to be 7.430?0.025 eV, and from this result and the revised bond dissociation energy of the neutral, the binding energy of the cation was calculated to be D?(Ni2+)=2.245?0.025 eV. Similarly, D?(Ni2)=1.812?0.014 eV is obtained using D?(Ni2) and the electron affinities of Ni and Ni2 . Twenty bands were rotationally resolved, all originating from a lower state of ?"=0g 1 or 0-u which we argue is the true ground state, in agreement with ligand field and ab initio theoretical studies. The rotational analysis also yielded a ground state bond length of 2.1545?0.0004 ? for 58Ni2.
Type Text
Publisher American Institute of Physics (AIP)
Volume 102
Issue 2
First Page 666
Last Page 674
DOI 10.1063/1.469562
Language eng
Bibliographic Citation Pinegar, J. C., Langenberg, J. D., Arrington, C. A., Spain, E. M., & Morse M. D. (1994). Journal of Chemical Physics, 102(2), 666-74.
Rights Management ¬©American Institute of Physics. The following article appeared in Pinegar, J. C., Lanenberg, J. D., Arrington, C. A., Spain, E. M., & Morse M. D. (1994). Journal of Chemical Physics, 102(2), 666-74. and may be found at http://dx.doi.org/10.1063/1.469562.
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Identifier ir-main,16949
ARK ark:/87278/s67h22sr
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2012-06-13
ID 703406
Reference URL https://collections.lib.utah.edu/ark:/87278/s67h22sr
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