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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Orr, B.J. Frost, M.J. Payne, M.A. Milce, A.P. |
| Copyright Year | 2000 |
| Description | Author affiliation: Dept. of Chem., Macquarie Univ., North Ryde, NSW, Australia (Orr, B.J.; Frost, M.J.; Payne, M.A.; Milce, A.P.) |
| Abstract | Time-resolved fluorescence-detected infrared-ultraviolet double resonance (IR-UV DR) techniques have been used to investigate the spectroscopic and dynamical behaviour of acetylene (C/sub 2/H/sub 2/) molecules in two rovibrational manifolds: /spl nu//sub CC/+3/spl nu//sub CH/ at /spl sim/11600 cm/sup -1/ and 4/spl nu//sub CH/ at /spl sim/12700 cm/sup -1/. The high symmetry and structural simplicity of the C/sub 2/H/sub 2/ molecule suggest that its behaviour at these 'chemically insignificant' levels of excitation should be regular and predictable. However, our IR-UV DR spectroscopic experiments in these regions reveal numerous puzzling anomalies. In an extension of the earlier IR-UV DR experiments, we have now completed a comprehensive spectroscopic, kinetic and modelling study of the 12700 cm/sup -1/ 4/spl nu//sub CH/ manifold of C/sub 2/H/sub 2/. This exhibits a marked 'gateway' role for one IR-bright rovibrational level: V/sub 1/=1, V/sub 3/=3, J=12. Remarkably, collisional and/or radiative fields are understood to couple to a quasi-continuous background of rovibrational states implicated in odd-/spl Delta/J symmetry-breaking energy transfer. |
| File Size | 88243 |
| File Format | |
| ISBN | 0780363183 |
| DOI | 10.1109/IQEC.2000.907916 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2000-09-10 |
| Publisher Place | France |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Energy exchange Resonance Electrons Energy states Chemicals Spectroscopy Kinetic theory Laser excitation Energy measurement Rotation measurement |
| Content Type | Text |
| Resource Type | Article |
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