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MO: Fachverband Molekülphysik
MO 21: Astrophysics and Ions
MO 21.2: Vortrag
Freitag, 13. März 2020, 14:30–14:45, f142
Rotational state selective electron recombination of CH+ molecules — •Daniel Paul1, Klaus Blaum1, Sebastian George1,2, Jürgen Göck1, Manfred Grieser1, Florian Grussie1, Robert von Hahn1, Naman Jain1, Ábel Kálosi1, Claude Krantz1, Holger Kreckel1, Christian Meyer1, Damian Müll1, Oldřich Novotný1, Felix Nuesslein1, Sunny Saurabh1, Daniel W. Savin3, Viviane C. Schmidt1, Xavier Urbain4, Patrick Wilhelm1, and Andreas Wolf1 — 1Max Planck Institute for Nuclear Physics, Heidelberg, Germany — 2University of Greifswald, Germany — 3Columbia University, New York, NY, USA — 4Institute of Condensed Matter and Nanosciences, UCLouvain, Belgium
Molecular cations in the interstellar medium (ISM) are used to trace the properties of diffuse interstellar clouds, out of which stars and planets are formed. These cations can be destroyed by dissociative recombination (DR) with electrons. Laboratory studies of DR are needed to understand molecular evolution in space. Here we have studied DR of CH + , which is of particular interest for diffuse cloud observations. In the electrostatic cryogenic storage ring CSR, CH + ions in lowest rovibrational states can be stored for DR studies at ISM-relevant conditions. Using merged ion and electron beams with a recently implemented electron cooler, low energy (meV) collisions can be studied. Here, we report on rotational state selective DR rate coefficient measurements of the CH+ ion. In addition, final state branching ratios and angular fragmentation characteristics were observed.