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Q: Fachverband Quantenoptik und Photonik
Q 6: Ultrakalte Moleküle (mit MO)
Q 6.4: Vortrag
Montag, 2. März 2009, 11:30–11:45, VMP 8 HS
Formation of dipolar molecules in the absolute groundstate — •Johannes Deiglmayr1,2, Anna Grochola1, Marc Repp3, Olivier Dulieu2, Roland Wester1, and Matthias Weidemüller3 — 1Physikalisches Institut, Albert-Ludwigs-Universität Freiburg — 2Laboratoire Aimé Cotton, CNRS, Orsay, France — 3Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg
Dipolar molecules in the absolute ground state are promising
candidates for the exploration of quantum phases in dipolar gases,
the control of ultracold chemical reaction, and a wide range of
further systems [1]. In this talk we will report on the formation of
ultracold LiCs molecules in the rovibrational ground state
X1Σ+,v″=0,J″=0 [2] using photoassociation (PA). The
formed molecules are detected in a setup combining resonant-enhanced
multi-photon ionization and a high resolution time-of-flight mass
spectrometer. Additionally, we employ depletion spectroscopy to
determine the rotational state of the formed molecules and to
measure the dipole moment of the ground state molecules by Stark
spectroscopy. Combining the results of PA and depletion
spectroscopy, we also improve the value of the dissociation energy
for the X1Σ+ ground state.
[1] O. Dulieu, M. Raoult, and E. Tiemann, E., Introductory review, Special Issue on cold molecules, J. Phys. B 39, (2006)
[2] J. Deiglmayr et al., PRL 101, 133004 (2008)