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Phys. Rev. Lett. 88, 083001 (2002) [4 pages]

Symmetry-Resolved Vibrational Spectroscopy for the C 1s-12πu Renner-Teller Pair States in CO2
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H. Yoshida1, K. Nobusada2, K. Okada3, S. Tanimoto3, N. Saito4, A. De Fanis5, and K. Ueda5 *
1Department of Physical Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
2Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, 060-0810, Japan
3Department of Chemistry, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
4National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8568, Japan
5Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan

Received 19 July 2001; published 7 February 2002

Symmetry-resolved excitation spectra have been measured for the Renner-Teller pair states A1 and B1 split from the core-excited C 1s-12πu state in CO2. A vibrational progression with the spacings of ∼145 meV is found in both the A1 and B1 spectra at different energies and assigned to the symmetric stretching mode caused in the B1 linear state, with the help of ab initio calculations. Appearance of the vibrations in the A1 spectrum is interpreted as due to nonadiabatic coupling between the A1 and B1 states via the bending motion.


©2002 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v88/e083001
DOI: 10.1103/PhysRevLett.88.083001
PACS: 33.20.Rm, 33.20.Tp

* Corresponding author.Electronic address: ueda@tagen.tohoku.ac.jp.

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