Intrinsic absorption profile and radiative cooling rate of a PAH cation revealed by action spectroscopy in the cryogenic electrostatic storage ring DESIREE

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.

Storage time dependent photodissociation action spectroscopy of polycyclic aromatic hydrocarbon cations in the cryogenic electrostatic storage ring DESIREE

The intrinsic absorption profile and radiative cooling rate of coronene cations are reported.

A summary of results obtained with the cryogenic electrostatic storage ring DESIREE

This paper highlights results from recent studies of cryogenically cooled atomic and molecular anions carried out at the DESIREE storage ring facility at Stockholm University in Stockholm, Sweden. These results include measurements of lifetimes of excited metastable states in atomic anions (S−, Se−, Te−, Ni−, and Pt−), pilot studies of rotational cooling of OH−, and cooling and decay of cluster anions exemplified by results for Ag5−.