Abstract book - Prof. Per Jensen, Ph.D. - Bergische Universität ...

Poster session, H32 145High Resolution Study of C 2 H 4 : Reanalysis of the Groundand Strongly Interacing v 4 , v 7 , and v 10 Vibrational BandsO. N. Ulenikov 1,2 , O. V. Gromova 3 , E. S. Bekhtereva 1,2 ,Yu. S. Aslapovskaya 2 and V.-M. Horneman 4Ulenikov O.N.Gromova O.V.Bekhtereva E.S.Aslapovskaya Yu.S.Horneman V.-M.1 Physical Chemistry Laboratory, ETH-Zürich, CH-8093, Zürich, Switzerland; 2 PhysicsDepartment, Tomsk State University, 634050, Tomsk, Russia; 3 Department ofTheoretical and Experimental Physics, Tomsk Polytechnic University, 634050, Tomsk,Russia; 4 Department of Physical Sciences, P.O. Box 3000, FIN – 90014 University ofOulu, FinlandThe infrared spectrum of the C 2 H 4 molecule has been measured in the region of 650 – 1150cm -1 with a Bruker IFS 125HR Fourier transform interferometer and analyzed. More than9000 transitions with J max. = 53 and K a max. =22 have been assigned to the bands v 7 , v 10 , and v 4the last is forbidden by the symmetry, and its transitions are appeared in the spectrum onlybecause of strong resonance interactions between the bands v 4 , on the one hand, and thebands v 7 , and v 10 , on the other hand). Known in the literature rotational and centrifugaldistortion parameters of the ground vibrational state were improved on the basis of assignedtransitions. The inverse spectroscopic problem was solved for the set of strongly interactingstates (v 4 = 1)/(v 7 = 1)/(v 10 = 1) (the fourth, ”dark” state (v 12 = 1), was also taken intoaccount). The obtained from the fit set of parameters reproduces the initial ”experimental”ro-vibrational energy values of the (v 4 =1)/(v 7 = 1)/(v 10 = 1) states with accuracies close toexperimental uncertainties.