Rostock 2019 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 8: Precision Mass Spectrometry
MS 8.6: Talk
Thursday, March 14, 2019, 12:15–12:30, U A-Esch 2
Electron-ion merged beam experiments at the Cryogenic Storage Ring (CSR) — •Daniel Paul1, Patrick Wilhelm1, Oldřich Novotný1, Sunny Saurabh1, Ábel Kálosi1,3, Klaus Blaum1, Manfred Grieser1, Robert von Hahn1, Claude Krantz1, Holger Kreckel1, Daniel Zajfman2, and Andreas Wolf1 — 1Max Planck Insitute for Nuclear Physics, Heidelberg, Germany — 2Weizmann Institute of Science, Rehovot, Israel — 3Visitor from Charles University of Prague, Czech Republic
Molecules up to water and organic species are produced in binary collisions in the cold interstellar medium (ISM), i.e. at ambient temperatures of ≈ 10−100 K. They influence the cooling of gas clouds and the formation of stars and planets. One of the key molecular reactions in the ISM is dissociative recombination (DR). Laboratory studies on DR are needed for understanding molecular evolution in space.
The cryogenic storage ring (CSR) provides a nearly perfect environment for DR studies at ISM-relevant conditions. With internal wall temperatures of 6 K most stored molecular ions radiatively cool to their rovibrational ground state. Moreover, a technically challenging, low-energy electron cooler was recently implemented into CSR that allows to perform electron-ion merged beam experiments in a cryogenic environment. Here we report on its electron cooling capabilities as well as on first rovibrational-state-selected DR rate coefficient measurements.