Hannover 2016 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 21: Cold Molecules & Helium Droplets 2
MO 21.1: Hauptvortrag
Freitag, 4. März 2016, 11:00–11:30, f142
Rotational state thermometry of hydroxyl anions at the Cryogenic Storage Ring (CSR) — •Christian Meyer1, Arno Becker1, Klaus Blaum1, Christian Breitenfeldt1,2, Sebastian George1, Jürgen Göck1, Manfred Grieser1, Florian Grussie1, Philipp Herwig1, Jonas Karthein1, Claude Krantz1, Holger Kreckel1, Sunil Kumar1, Jorrit Lion1, Svenja Lohmann1, Preeti M. Mishra1, Oldřich Novotný1, Aodh P. O’Connor1, Roland Repnow1, Kaija Spruck1,3, Stefan Schippers3, Dirk Schwalm1,4, Lutz Schweikhard2, Stephen Vogel1, Robert von Hahn1, and Andreas Wolf1 — 1Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany — 2Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany — 3Institut für Atom- und Molekülphysik, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany — 4Weizmann Institute of Science, Rehovot 76100, Israel
The population of rotational states in a beam of OH− ions stored in the CSR [1] was monitored for up to 1200 s using near-threshold photodetachment spectroscopy, similar to previous ion trap studies [2]. In the 35 m circumference electrostatic storage ring operated at around 10 K vacuum chamber temperature, storage times of the order of 1 hour for 60 keV ion beams were recently demonstrated. By photodetachment spectroscopy the evolution of level populations in J=2, 1 and 0 could be derived. Equilibrium populations over 95% in J=0 were reached.
R. von Hahn et al., Nucl. Instr. Meth. B 269, 2871 (2011)
R. Otto et al., Phys. Chem. Chem. Phys. 15, 612 (2013)