Hannover 2020 – scientific programme
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MO: Fachverband Molekülphysik
MO 19: MO Poster 4
MO 19.17: Poster
Thursday, March 12, 2020, 17:00–19:00, Empore Lichthof
Reaction studies of astrophysically relevant anions — •Markus Nötzold, Robert Wild, Christine Lochmann, and Roland Wester — Universität Innsbruck, Inst. für Ionenphysik und Angewandte Physik, A-6020 Innsbruck
After the radioastronomical discovery of the first interstellar anions, interest has grown in understanding the formation and destruction pathways of negative ions in the interstellar medium (ISM). The simplest anion, H−, is expected to be present in the ISM, but its detection is difficult as it possess only a single bound state. The most fundamental reaction of H− is the proton transfer reaction with H2, and occurs via tunneling through the reaction barrier at low temperatures. Starting with D−, we have studied the reaction D− + H2 → H− + HD in a cryogenic 22-pole trap. Furthermore, we present results on the reaction Cl− + H2+ H2 → H2Cl- + H2 and H− + C2H2 → C2H− + H2. The former reaction also serves as a temperature diagnostics for our 22-pole trap and our newly developed multipole wire trap.