%0 Journal Article %T Excited electronic structure of methylcyanoacetylene probed by VUV Fourier-transform absorption spectroscopy %+ Institut des Sciences Moléculaires d'Orsay (ISMO) %+ Instituto de Fisica %+ Institute of Physical Chemistry %+ Institut des Sciences Chimiques de Rennes (ISCR) %+ Synchrotron SOLEIL (SSOLEIL) %A Lamarre, N. %A Gans, B. %A Vieira Mendes, L.A. %A Gronowski, M. %A Guillemin, J.-C. %A de Oliveira, N. %A Douin, S. %A Chevalier, M. %A Crépin, C. %A Kołos, R. %A Boyé-Péronne, S. %Z J.-C.G. thanks the Centre National d׳Études Spatiales (CNES) for a grant and the CNRS program Physique et Chimie du Milieu Interstellaire (PCMI) for financial support. R.K. and M.G. acknowledge the support from the National Science Centre (Poland), project no. 2011/03/B/ST4/02763. %< avec comité de lecture %@ 0022-4073 %J Journal of Quantitative Spectroscopy and Radiative Transfer %I Elsevier %V 182 %P 286--295 %8 2016 %D 2016 %R 10.1016/j.jqsrt.2016.06.020 %K Ground state %K Ionization of gases %K Ionization potential %K Radiation %K Rydberg states %K Spacecraft instruments %K Spectrometers %K Synchrotron radiation %K Synchrotrons %K 2-Butynenitrile %K Absorption cross sections %K Cyanopropyne %K Fourier transform spectrometers %K Rydberg series %K Fourier series %K Fourier transform infrared spectroscopy %K Fourier transforms %K Excited states %K Electronic structure %K Density functional theory %K Bolometers %K Absorption spectroscopy %Z Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph] %Z Chemical Sciences/Theoretical and/or physical chemistryJournal articles %X High resolution photoabsorption spectrum of gas-phase methylcyanoacetylene (CH3C3N) has been recorded from 44 500 to 130 000 cm−1 at room temperature with a vacuum ultraviolet Fourier-transform spectrometer on the DESIRS synchrotron beamline (SOLEIL). The absolute photoabsorption cross section in this range is reported for the first time. Valence shell transitions and Rydberg series converging to the ground state X˜+E2 of the cation as well as series converging to electronically excited states (A˜+A12 and C˜+) are observed and assigned. Time-dependent density-functional-theory calculations have been performed to support the assignment of the experimental spectrum in the low energy range. A tentative scaling of the previously measured CH3C3N+ ion yield by Lamarre et al. [17] is proposed, based on the comparison of the absorption data above the first ionization potential with the observed autoionization structures. %G English %2 https://univ-rennes.hal.science/hal-01367230/document %2 https://univ-rennes.hal.science/hal-01367230/file/Excited%20electronic%20structure%20of%20methylcyanoacetylene.pdf %L hal-01367230 %U https://univ-rennes.hal.science/hal-01367230 %~ UNIV-RENNES1 %~ CNRS %~ UNIV-PSUD %~ INSA-RENNES %~ ENSC-RENNES %~ ISCR %~ SCR-COS %~ JYB-LAB %~ STATS-UR1 %~ UR1-SPM %~ INC-CNRS %~ UR1-UFR-SPM %~ UR1-HAL %~ ISCR-CORINT %~ UR1-SDLM %~ UNIV-PARIS-SACLAY %~ UNIV-PSUD-SACLAY %~ SYNCHROTRON-SOLEIL %~ TEST-UNIV-RENNES %~ TEST-UR-CSS %~ UNIV-RENNES %~ INSA-GROUPE %~ UR1-MMS %~ ISCR-CORINT3 %~ GS-CHIMIE %~ GS-PHYSIQUE %~ INSTITUT-SCIENCES-LUMIERE %~ TEST2-HALCNRS