Electronic absorptions of C5+ detected in the visible through action spectroscopy in a cryogenic trap

Elliott Reedy, Johanna Rademacher, Rafal Szabla, Ewen K Campbell

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The 2Πg←X2Σu+ electronic spectrum of C5+ in the gas-phase with origin band at 513nm is reported following experiments in a cryogenic ion trapping instrument. Buffer gas-cooled C5+ ions, generated by laser vaporisation of graphite, were investigated using two action spectroscopy approaches. Laser-induced dissociation of weakly bound C5+−Hen complexes synthesised in the trap reveal a linear dependence of the absorption energies on n allowing prediction of those of the bare ion C5+. These results are confirmed in two colour experiments on C5+, by monitoring fragmentation into the C3+ C2 product channel. The data are supplemented with high-level electronic structure calculations which support the assignment of D∞h symmetry to the ground electronic state. These laboratory results provide the requisite data needed for spectroscopic detection of this structure in terrestrial and extraterrestrial environments.
Original languageEnglish
JournalMolecular Physics
Early online date13 Oct 2021
DOIs
Publication statusE-pub ahead of print - 13 Oct 2021

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