Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 41: Precision Spectroscopy of Atoms and Ions V / Ultra-cold Plasmas and Rydberg Systems II (joint session A/Q)
A 41.3: Talk
Friday, March 15, 2024, 15:00–15:15, HS 1098
Stopping mass-selected alkaline-earth metal mono-fluoride beams via formation of unusually stable anions — •Konstantin Gaul1, Ronald F. Garcia Ruiz2, and Robert Berger1 — 1Fachbereich Chemie, Philipps-Universität Marburg,Hans-Meerweinstraße 4, 35032 Marburg, Germany — 2Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Direct laser-coolability and a comparatively simple electronic structure render alkaline-earth metal monofluoride molecules (MF), versatile laboratories for precision tests of fundamental physics. In this theoretical work, prospects for efficient stopping and cooling of hot beams of mass-selected MF molecules via their anions are explored. With sophisticated quantum chemical methods it is shown that these molecular anions posses an unusually strong chemical bond and have favourable photo-electron detachment energies. For RaF− a vibronic structure with favorable properties for efficient pre-cooling is identified. This study indicates even chances for direct laser-cooling of the anion.
Keywords: Anions; Laser-cooling; Beam stopping; Cold molecules; Alakaline-earth metals