Author： Hurtmans D. Rizopoulos A. Herman M. Hassan L. M. S. Perrin A.
Publisher： Taylor & Francis Ltd
ISSN： 1362-3028
Source： Molecular Physics, Vol.99, Iss.5, 2001-03, pp. : 455-461
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Abstract
A Fourier transform interferometer was used to record the slit-jet cooled absorption spectrum of 12C2H4 between 700 and 2400cm-1, at a spectral resolution of 0.005 cm-1. Three bands, υ12 at 1442.442 70(1) cm-1, υ7 + υ8 at 1888.978 23(3) cm-1 and υ6 + υ10 at 2047.775 832(2) cm&-1;, were rotationally analysed. In the case of 7181, a known Coriolis perturbation mechanism involving the nearby 4181 (1958.264 cm-1) and 81101 (1766.391 cm-1) states was accounted for in the analysis. The latter fitting procedure included 12 levels from the 4181 state which are observed because lines from υ4 + υ8 borrow intensity from υ7 + υ8. Compared to the literature, significantly improved vibration-rotation constants were obtained for all upper states reported in the present study.
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