5314027790

POSTER SESSION. H53

¹²C¹⁶0₂ : ROVIBRATIONAL TRANSITIONS V₁V₂^eV₃    V₁V₂^e(V₃-l) WITH

(2 V₁₊V₂) = 6 OCCURING BETWEEN IIIGIILY EXCITED VIBRATIONAL

STATES IN THE 4.5 pM REGION.

D. BAILLY*^A- S.A. TASHKUN**, V.I. PEREVALOV", J.L. TEFFO*^b

* Laboratoire de Physiąue Molćculaire et Applications Unitć propre dii C.N.R.S. (UPR 0136), associć anx Universitćs Paris-Sud et Pierre et Marie Curie, a) - Universitć Paris-Sud Bar 350 91405 Orsay Cćdex FRANCE, b) - Universitć Pierre et Marie Curie.Tour 13 - Bte 76 - 4, Place Jussieu

75252 PAR1S Cedex 05 , FRANCE.

**lnstitute of Aunospheric Optics Siberian branch, Russian Academy of Sciences

1, Akademischeskii av„ 634055 Tomsk, RUSSIA

The experimental technique which consists in exciting a mixture C0₂ + N₂ in a d.c. discharge tubę is very efficient to populate very high vibrational lcvcls and spccially those of the v₀ modę according to the pression conditions. Eight emission spectra of mixtures C0₂ + N2 were recordcd with a Fourier Transform Spectrometer (Bruker Spectrometer 120HR) at a rcsolution of 0.003 cm'¹ in the 4.5 pm region.

13 new vibrational transitions which have not been observed earlier and which occur betwcen highly excitcd levels (hencc their very smali population) have been observed

06²1 -»06*0 (14^{3 4}1)_u ->(14³0)_u (22^j1)_uj->(22^J0),„ (30°1)_I234 ^(30°0)₁₂_,₄ The wavenumbers are reponed as well as the derived spectroscopic parameters which allow to reproduce the experimental wavenumbers with a RMS < 3 x 10'³ cm'¹.

The results are in good agreement with the new predictions of CO2 linę positions which have been performed using a model calculation (General Inverse Solver Program)¹, based upon the effective hamiltonian approach⁵. The comparisons have been done also with the recently released HITRAN 96 database⁶ A large differences between the HITRAN 96 linę positions and the positions measured in this work were found for most of the transitions considered.

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