Photoprocessing of large PAH cations.

Autor:	Wenzel G; IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France., Castillo SR; IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France.; LCPQ/IRSAMC, Université de Toulouse (UPS), CNRS, Toulouse, France., Mulas G; IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France.; Istituto Nazionale di Astrofisica - Osservatorio Astronomico di Cagliari, Selargius (CA), Italy., Ji MC; IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France., Bonnamy A; IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France., Sabbah H; IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France.; LCAR/IRSAMC, Université de Toulouse (UPS), CNRS, Toulouse, France., Giuliani A; Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, Gif-sur-Yvette, France.; INRA, UAR1008, CEPIA, Nantes, France., Nahon L; Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, Gif-sur-Yvette, France., Joblin C; IRAP, Université de Toulouse (UPS), CNRS, CNES, Toulouse, France.
Jazyk:	angličtina
Zdroj:	Proceedings of the International Astronomical Union. International Astronomical Union [Proc Int Astron Union] 2019 Apr; Vol. 15 (Suppl 350), pp. 388-389. Date of Electronic Publication: 2020 Oct 12.
DOI:	10.1017/S1743921319007063
Abstrakt:	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.
Databáze:	MEDLINE
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