Intrinsic absorption profile and radiative cooling rate of a PAH cation revealed by action spectroscopy in the cryogenic electrostatic storage ring DESIREE. Issue Volume 15:Issue S350(2019) (April 2019)

• Record Type: Journal Article
• Authors: Stockett, Mark H.; Björkhage, Mikael; Cederquist, Henrik; Schmidt, Henning T.; Henning, Zettergren
• Editors: Salama, Farid; Linnartz, Harold
• Is Part Of: Proceedings of the International Astronomical Union. Volume 15:Issue S350(2019)
• Page Start: 127
• Page End: 131
• Publication Date: 2019-04
• Subjects: molecular data, -- techniques: spectroscopic, -- ISM: molecules; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921319007130
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: The multi-photon photodissociation (MPD) action spectrum of the coronene cation $$({{\rm{C}}_{24}}{\rm{H}}_{12}^ + )$$ has been measured as a function of storage time up to 60 s in the cryogenic electrostatic storage ring DESIREE. These measurements reveal not only the intrinsic absorption profile of isolated coronene cations, but also the rate at which hot-band absorptions are quenched by radiative cooling. The cooling rate is interpreted using a Simple Harmonic Cascade model of infrared vibrational emission.