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Communication: On the first ionization threshold of the C 2 H radical

Abstract : The slow photoelectron spectrum of the ethynyl radical has been recorded for the first time by using the DESIRS beamline of the SOLEIL synchrotron facility. Ethynyl was generated using a microwave discharge flow tube. The observation of the X+Π3←XΣ+2 transition allowed the first direct measurement of the adiabatic ionization threshold of this radical (EI = 11.641(5) eV). The experimental results are supported by ab initio calculations. Our preliminary investigation of the cationic ground state potential energy surfaces predicts a non-negligible Renner-Teller effect which has not been discussed previously.
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Contributeur : Bérenger Gans <>
Soumis le : mardi 19 mars 2019 - 08:47:17
Dernière modification le : jeudi 1 juillet 2021 - 16:45:33

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B. Gans, G. Garcia, F. Holzmeier, J. Krüger, A. Röder, et al.. Communication: On the first ionization threshold of the C 2 H radical. Journal of Chemical Physics, American Institute of Physics, 2017, 146 (1), pp.011101. ⟨10.1063/1.4973383⟩. ⟨hal-02072221⟩



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