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JOURNALS // Optics and Spectroscopy // Archive

Optics and Spectroscopy, 2022 Volume 130, Issue 8, Pages 1142–1152 (Mi os1799)

Spectroscopy and physics of atoms and molecules

High resolution spectroscopy of strongly interacting bands $\nu_4$, $\nu_6$, $\nu_7$, $\nu_8$, and $\nu_{10}$ of deuterated ethylene, C$_2$H$_3$D

E. S. Bekhterevaa, A. S. Belovaa, P. A. Glushkova, O. V. Gromovaa, Ch. Sydowb

a Tomsk Polytechnic University, 634050 Tomsk, Russia
b Insitute of physical and theoretical chemistry of Technical University of Braunschweig, D - 38106 Braunschweig, Germany

Abstract: Rotational structure of strongly interacting bands $\nu_4$, $\nu_6$, $\nu_7$, $\nu_8$, and $\nu_{10}$ of the C$_2$H$_3$D molecule is spectroscopically studied. Spectra were recorded by Fourier spectrometer Brucker 125HR in the laboratory of physical and theoretical chemistry of Technical University of Braunschweig. 27950 transitions with maximum values of $J^{\mathrm{max}}$ = 40 and $K^{\mathrm{max}}_a$ = 20 were assigned to the studied bands. The effective Hamiltonian parameters were determined in the model including the $\nu_3$ resonating state. The 4028 upper energy levels were used as incoming data. They are reproduced with root mean square deviation of $d_{\mathrm{rms}}$ = 1.7 $\cdot$ 10$^{-4}$ cm$^{-1}$. Corresponding value for more than 24000 line positions is $d_{\mathrm{rms}}$ = 2.1 $\cdot$ 10$^{-4}$ cm$^{-1}$.

Keywords: ethylene, high resolution spectroscopy, strongly interacting bands, Fourier-spectroscopy.

Received: 28.02.2022
Revised: 20.04.2022
Accepted: 21.04.2022

DOI: 10.21883/os.2022.08.52898.3329-22



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© Steklov Math. Inst. of RAS, 2025