The millimeter wave spectrum of the 13C16O dimer

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DOIResolve DOI: http://doi.org/10.1016/j.jms.2003.10.009
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TypeArticle
Journal titleJournal of Molecular Spectroscopy
Volume223
Issue2
Pages132137; # of pages: 6
Subjectdimer; millimeter; van der Waals complex
AbstractThe millimeter wave spectrum of the isotopically substituted CO dimer, (13C16O)2, has been studied for the first time, confirming and extending a recent infrared study. Eighty-seven transitions in the 77-180?GHz region have been assigned and analyzed in terms of a model-independent term value scheme involving 57 rotational levels with J=0-8. The levels can be classified into 7 "stacks" which have symmetry classifications of either A-/B+ or A+/B- and K-values of either 0 or 1. For the normal isotope, symmetry and nuclear spin statistics cause alternate rotational levels to be missing, but for (13C16O)2 all levels are present with an intensity alternation of 1:3 between A and B symmetries. The four A-/B+ stacks have not previously been observed, and the lowest of them establishes the tunneling splitting of (13C16O)2 to be 3.769?cm-1, slightly larger than the (12C16O)2 value of 3.731?cm-1. A large amount of precise experimental data is now available for the CO dimer, which should lead to greater theoretical insight into its structure and tunneling dynamics.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
NPARC number12333576
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Record identifierf4d6a4d6-74cf-43af-85f3-20d7b1945530
Record created2009-09-10
Record modified2016-05-09
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