15min:

O. N. ULENIKOV, G. A. ONOPENKO, N. E. TYABAEVA, Tomsk State University, Tomsk, Russia; J. SCHRODERUS, S. ALANKO AND R. ANTTILA, University of Oulu, Finland.

On the basis of recorded (Oulu, Finland) high resolution Fourier transform spectra (₃, ₅, and ₆ bands) and of "supercombination differences" method A₁--A₂ (K=3) splittings were first time determined in the ground vibrational state of the ¹²CH₃D molecule for the states with 103 parameters which are responsible for such splittings is solved on the basis both of theoretical calculation and of analysis of resonance interactions in the recorded experimental spectra. Numerous peculiarities in the spectra of the ₃, ₅, and ₆ bands (in particular A₁--A₂ splittings for the K=1,2,3,4,5,6,7, and other effects) are discussed. Analogous problems for the ¹³CH₃D molecule are considered.