Resonant two-photon ionization spectroscopy of jet-cooled Au?

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Publication Type Journal Article
School or College College of Science
Department Chemistry
Creator Morse, Michael David
Other Author Bishea, Gregory A.
Title Resonant two-photon ionization spectroscopy of jet-cooled Au?
Date 1991
Description A band system of jet-cooled Au, has been located in the near infrared region of the spectrum using resonant two-photon ionization spectroscopy. The origin band is located at 13 354.15 cm-? and the system extends more than 700 cm-? further to the blue. The excited state displays a radiative lifetime of approximately 28 ?s, corresponding to an absorption oscillator strength of f~.0003. Accordingly, it is thought that the transition corresponds to a spin-forbidden doublet (S = l/2) to quartet (S = 3/2) transition, which is made allowed by spin-orbit contamination, presumably in the upper state. A progression in a totally symmetric stretching vibration (? = 179.7 cm-?) is obvious in the spectrum, along with a much weaker progression in another mode, which displays an interesting pattern of splittings. Although no assignment is absolutely unambiguous, various candidates are presented. The most likely of these assigns the system as an ? ?E ? ?x ?E? transition in the D?h point group, with both the ground X?E? and excited ? ?E? states undergoing Jahn-Teller distortion. The vibronic levels of the ? ?E? state have been fitted assuming a linear Jahn-Teller effect in a system with both spin-orbit splitting and a significant anharmonicity in the Jahn-Teller active e? vibrational mode. The combined effects of anharmonicity in the Jahn-Teller active mode and spin-orbit coupling appear not to have been previously investigated, they are therefore examined in some detail.
Type Text
Publisher American Institute of Physics (AIP)
Volume 95
Issue 12
First Page 8779
Last Page 8792
DOI 10.1063/1.461213
Language eng
Bibliographic Citation Bishea, G. A., & Morse, M. D. (1991). Resonant two-photon ionization spectroscopy of jet-cooled Au?. Journal of Chemical Physics, 95(12), 8779-92.
Rights Management ¬©American Institute of Physics. The following article appeared in Bishea, G. A., & Morse, M. D. (1991). Resonant two-photon ionization spectroscopy of jet-cooled Au?. Journal of Chemical Physics, 95(12), 8779-92. and may be found at http://dx.doi.org/10.1063/1.461213.
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Identifier ir-main,16993
ARK ark:/87278/s6fn1qjb
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2012-06-13
ID 704436
Reference URL https://collections.lib.utah.edu/ark:/87278/s6fn1qjb
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