Hamburg 2009 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 15: Poster I
A 15.23: Poster
Dienstag, 3. März 2009, 16:30–19:00, VMP 9 Poster
Mg-Candidate for an optical atomic clock — •Temmo Wübbena1, Jan Friebe1, Matthias Riedmann1, Andre Pape1, Osama Terra2, Gesine Grosche2, Wolfgang Lipphardt2, Harald Schnatz2, Ernst M. Rasel1, and Wolfgang Ertmer1 — 1Institute of Quantum Optics, University of Hanover, Welfengarten 1, 30167 Hannover — 2Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
Mg belongs to the small group of the elements suitable for a next generation optical atomic clock. We have recently measured the frequency of the clock transition (3s2)1S0 → (3s3p)3P1 on a thermal atomic beam apparatus with an accuracy on the level of 10−12. From this measurement we could derive the frequency of the strongly forbidden (3s2)1S0 → (3s3p)3P0 intercombination transition which will be of interest as a clock transition for a future lattice clock. In this poster we present the current status of our work towards the realization of an optical lattice clock with Mg including an improved frequency measurement based on cold Mg atoms via telecom fiber network and a characterization of our new MOT in the triplet system. This metastable MOT serves as an efficient detector for the atoms that were excited in our Ramsey Borde atom interferometer. At the same time it will be the starting point for new cooling approaches since the cooling in the triplet system is not limited by the Doppler theory and we expect to reach temperatures which enable efficient loading an optical dipole trap.