Publication Type |
Journal Article |
School or College |
College of Science |
Department |
Chemistry |
Creator |
Morse, Michael David |
Other Author |
Lemire, George W.; Bishea, Gregory A.; Heidecke, Scott A. |
Title |
Spectroscopy and electronic structure of jet-cooled GaAs |
Date |
1989 |
Description |
An optical spectrum, obtained by resonant two-photon ionization spectroscopy, is reported for jet-cooled diatomic gallium arsenide. The ground state is identified as X??-, deriving from a ??rr? molecular configuration, and is characterized by ?" = 215 cm-1, ?"exe" = 3 cm-1, and r0' = 2.53 ? 0.02 ?. The upper state of the observed band system is 3IIr correlating to the Ga 4s?4p, ?P? + As 4s?4p?, ?D0 excited separated atom limit. A strong predissociation sets in above v'=0 for the ?'=2,1 and 0- components of the 3IIr excited state, and it is proposed that this is induced by spin-orbit interaction with the ??*rr?,??- state which correlates to ground state atomic fragments. Constants for the upper ?IIo+ state are ?'e = 152.13 ? 0.70 cm-1, ?'ex'e = 2.89 ? 0.08 cm-1, and r"e = 2.662 ? 0.027 A for the 69Ga7 5As isotopic modification. The ionization potential of GaAs has been bracketed as IP(GaAs) = 7.17 ? 0.75 eV, and a reevaluation of the third-law measurement of the bond strength provides D0(GaAs) = 2.06 ? 0.05 eV. Comparisons to group IV and other group HI-V diatomics, and to the bulk solid materials are also presented. |
Type |
Text |
Publisher |
American Institute of Physics (AIP) |
Volume |
92 |
Issue |
1 |
First Page |
121 |
Last Page |
132 |
DOI |
10.1063/1.458481 |
Language |
eng |
Bibliographic Citation |
Lemire, G. W., Bishea, G. A., Heidecke, S. A., & Morse, M. D. (1989). Spectroscopy and electronic structure of jet-cooled GaAs. Journal of Chemical Physics, 92(1), 121-32. |
Rights Management |
©American Institute of Physics. The following article appeared in Lemire, G. W., Bishea, G. A., Heidecke, S. A., & Morse, M. D. (1989). Spectroscopy and electronic structure of jet-cooled GaAs. Journal of Chemical Physics, 92(1), 121-32. and may be found at http://dx.doi.org/10.1063/1.458481. |
Format Medium |
application/pdf |
Format Extent |
1,292,053 bytes |
Identifier |
ir-main,16973 |
ARK |
ark:/87278/s6mp5mvj |
Setname |
ir_uspace |
ID |
706866 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6mp5mvj |