Abstract
The antisymmetric C–H stretching vibration () of ionised acetylene, , has been revisited using a cryogenic 22-pole ion trap machine. Two action spectroscopic techniques, the novel leak-out spectroscopy (LOS) method and the more established laser-induced reactions (LIR) method, are applied and compared. Mass selectivity and cryogenic temperatures down to 4 K enabled the observation of uncontaminated spectra in which the Λ-doubling components of this open-shell molecule are mostly well resolved, leading to a slight refinement of the spectroscopic parameters.
Acknowledgments
The LIR-measurement of the Q-branch depicted in Figure has been conducted in the year 2008 in collaboration with Sabrina Gärtner and Jürgen Krieg. Additional LIR measurements have been performed by Pavol Jusko in 2014 (not shown in this work).
Disclosure statement
No potential conflict of interest was reported by the author(s).