Stuttgart 2012 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 19: Cold Molecules II
MO 19.6: Vortrag
Donnerstag, 15. März 2012, 15:30–15:45, V38.03
Multistage Zeeman deceleration of paramagnetic atoms and molecules — •Michael Motsch, Alex W. Wiederkehr, Stephen D. Hogan, and Frédéric Merkt — Laboratorium für Physikalische Chemie, ETH Zürich, CH-8093, Switzerland
In a multistage Zeeman decelerator, time-dependent, inhomogeneous magnetic fields are applied to control the velocity of supersonic beams of paramagnetic atoms and molecules. Using an array of 91 deceleration solenoids, we have produced velocity-controlled beams of metastable neon atoms at translational temperatures as low as 10 mK in the comoving frame of reference and characterized the phase-space acceptance of the multistage Zeeman decelerator. By applying deceleration pulse sequences for different isotopes of neon, we have investigated the selectivity of the deceleration process on the magnetic-moment-to-mass ratio of the particles in the beam [1]. The versatility of the method is demonstrated by producing slow beams of oxygen molecules in the X 3Σg− electronic ground state, which enables the study of internal-state selectivity in the deceleration process.
A. W. Wiederkehr et al., J. Chem. Phys. 135, 214202 (2011).