Ítem
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Luis Luis, Josep Maria
Torrent Sucarrat, Miquel Solà i Puig, Miquel Bishop, David M. Kirtman, Bernard |
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| Our new simple method for calculating accurate Franck-Condon factors including nondiagonal (i.e., mode-mode) anharmonic coupling is used to simulate the C2H4+X2B 3u←C2H4X̃1 Ag band in the photoelectron spectrum. An improved vibrational basis set truncation algorithm, which permits very efficient computations, is employed. Because the torsional mode is highly anharmonic it is separated from the other modes and treated exactly. All other modes are treated through the second-order perturbation theory. The perturbation-theory corrections are significant and lead to a good agreement with experiment, although the separability assumption for torsion causes the C2 D4 results to be not as good as those for C2 H4. A variational formulation to overcome this circumstance, and deal with large anharmonicities in general, is suggested | |
| http://hdl.handle.net/2072/116493 | |
| eng | |
| American Institute of Physics | |
| Tots els drets reservats | |
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Algorismes
Anàlisi espectral Anàlisi harmònica Dinàmica molecular -- Simulació per ordinador Espectroscòpia fotoelèctrica Etilè Pertorbació (Matemàtica) Polarització (Electricitat) Algorithms Ethylene Harmonic analysis Molecular dynamics -- Computer simulation Perturbation (Mathematics) Photoelectron spectroscopy Polarization (Electricity) Spectrum analysis |
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| Calculation of Franck-Condon factors including anharmonicity: simulation of the C2 H4+ X̃2B 3u←C2 H4X̃1 Ag band in the photoelectron spectrum of ethylene | |
| info:eu-repo/semantics/article | |
| Recercat |
