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Photoprocessing of large PAH cations

Published online by Cambridge University Press:  12 October 2020

Gabi Wenzel Open the ORCID record for Gabi Wenzel [Opens in a new window] ,
Sarah Rodriguez Castillo ,
Giacomo Mulas ,
Ming-Chao Ji ,
Anthony Bonnamy ,
Hassan Sabbah Open the ORCID record for Hassan Sabbah [Opens in a new window] ,
Alexandre Giuliani ,
Laurent Nahon  and
Christine Joblin
Gabi Wenzel
Affiliation:
IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France email: [email protected]
Sarah Rodriguez Castillo
Affiliation:
IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France email: [email protected] LCPQ/IRSAMC, Université de Toulouse (UPS), CNRS, Toulouse, France
Giacomo Mulas
Affiliation:
IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France email: [email protected] Istituto Nazionale di Astrofisica - Osservatorio Astronomico di Cagliari, Selargius (CA), Italy
Ming-Chao Ji
Affiliation:
IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France email: [email protected]
Anthony Bonnamy
Affiliation:
IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France email: [email protected]
Hassan Sabbah
Affiliation:
IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France email: [email protected] LCAR/IRSAMC, Université de Toulouse (UPS), CNRS, Toulouse, France
Alexandre Giuliani
Affiliation:
Synchrotron SOLEIL, L13Orme des Merisiers, Saint Aubin, Gif-sur-Yvette, France INRA, UAR1008, CEPIA, Nantes, France
Laurent Nahon
Affiliation:
Synchrotron SOLEIL, L13Orme des Merisiers, Saint Aubin, Gif-sur-Yvette, France
Christine Joblin
Affiliation:
IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France email: [email protected]
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Abstract

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In cosmic environments, polycyclic aromatic hydrocarbons (PAHs) strongly interact with vacuum ultraviolet (VUV) photons emitted by young stars. Trapped PAH cations ranging in size from 30 to 48 carbon atoms were irradiated by tunable synchrotron light (DESIRS beamline at SOLEIL). Their ionization and dissociation cross sections were determined and compared with TD-DFT computed photoabsorption cross sections. Evidence for radiative cooling is reported.

Keywords

AstrochemistryISM: moleculesmethods: laboratoryultraviolet: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S350: Laboratory Astrophysics: From Observations to Interpretation , April 2019 , pp. 388 - 389
Copyright
© International Astronomical Union 2020

References

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