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High-resolution infrared spectroscopy of the CH2 = CD2 molecule

Abstract : In this thesis we have considered spectra of the CH2=CD2 molecule. In the experimental part we recorded high-resolution (~ 0.0025 cm-1) infrared spectra and made full assignment of the recorded transitions. We were able to assign for the first time a lot of transitions to the weak combinations υ4+υ10, υ4+υ7 and 2υ10 overtone; forbidden due to the symmetry υ4, υ7+υ10, υ8+υ10; «hot» υ7+υ10–υ10 and υ8+υ10–υ10 bands. More than 7000 previously unknown transitions were assigned to the fundamental bands υ2, υ3, υ6, υ7, υ8, υ10, υ12 and 2υ7 overtone. On the base of operator perturbation theory and the symmetry properties of the studied molecule, we constructed an effective Hamiltonian and then fitted experimental ro-vibrational energies of fourteen vibrational states. As a result, rms-deviation of the fit was about (1.7–2.5)×10−4 cm−1 for various spectral regions. We measured also experimental values of intensities and halfwidths and calculated parameters of effective dipole moment and self-broadening coefficients of the СH2=СD2 molecule.
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Submitted on : Tuesday, December 18, 2018 - 9:03:07 AM
Last modification on : Thursday, December 20, 2018 - 1:14:14 AM
Long-term archiving on: : Wednesday, March 20, 2019 - 12:22:20 PM


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  • HAL Id : tel-01958442, version 1


Kirill Berezkin. High-resolution infrared spectroscopy of the CH2 = CD2 molecule. Physics [physics]. Université Bourgogne Franche-Comté, 2018. English. ⟨NNT : 2018UBFCK044⟩. ⟨tel-01958442⟩



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