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Title: First-principles C band absorption spectra of SO2 and its isotopologues

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4980124· OSTI ID:1465974

The low-energy wing of the C~1B2 ← X~1A1 absorption spectra for SO2 in the ultraviolet region is computed for the 32S,33S,34S and 36S isotopes, using the recently developed ab initio potential energy surfaces (PESs) of the two electronic states and the corresponding transition dipole surface. The state-resolved absorption spectra from various ro-vibrational states of SO2(X~1A1) are computed. When contributions of these excited ro-vibrational states are included, the thermally averaged spectra are broadened but maintain their key characters. Excellent agreement with experimental absorption spectra is found, validating the accuracy of the PESs. Here, the isotope shifts of the absorption peaks are found to increase linearly with energy, in good agreement with experiment

Research Organization:
Univ. of New Mexico, Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0015997
OSTI ID:
1465974
Alternate ID(s):
OSTI ID: 1361820
Journal Information:
Journal of Chemical Physics, Vol. 146, Issue 15; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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