Erlangen 2022 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 8: Poster 1
MO 8.17: Poster
Dienstag, 15. März 2022, 16:30–18:30, P
Towards the Threshold Photodetachment Spectroscopic studies of C2− — •Sruthi Purushu melath, Christine Lochmann, Markus Nötzold, Robert Wild, and Roland Wester — Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria
Different neutral and charged interstellar molecules constitute the building blocks for a rich reaction network in the interstellar medium (ISM). Many complex molecules have been detected but many observed spectra still have unidentified features. Photodetachment cross-section studies are crucial for predicting the abundance of anions in the ISM.
The threshold photodetachment spectroscopy of CN− was performed by our group at both 16 K and 295 K in a 22-pole ion trap and 295 K from a pulsed ion beam using crossed-beam velocity map imaging (VMI) setup [1]. In next experiments we aim to study the threshold photodetachment spectroscopy of C2−, which is speculated to exist in the interstellar medium, in a 16-pole radiofrequency ion trap, which can be cooled down to 6 K to mimic conditions in the ISM. For the photodetachment, we will use the frequency-doubled tunable dye laser system (output produces a scanning range of 365 nm - 385 nm) in our lab. The status of the experiment will be presented.
[1] M. Simpson, et al., Threshold photodetachment spectroscopy of the astrochemical anion CN−. J.
Chem. Phys. 153, 184309 (2020).