Berlin 2005 – scientific programme
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MO: Molekülphysik
MO 22: Poster I
MO 22.1: Poster
Saturday, March 5, 2005, 10:30–12:30, Poster HU
Spectroscopic studies of the NaCs triplet ground state — •H. Knöckel1, O. Docenko2, E. Zaharova2, M. Tamanis2, R. Ferber2, A. Pashov3, and E. Tiemann1 — 1Institut für Quantenoptik, Universität Hannover — 2Department of Physics and Institute of Atomic Physics and Spectroscopy, University of Latvia, Riga, Latvia — 3Institute for Scientific Research in Telecommunications, Sofia, Bulgaria
Recent success in the photoassociation of heteroalkalis, like RbCs [1] and KRb [2], demands for detailed spectroscopic studies, especially close to the atomic asymptote, to get better predictions for further experiments. The ground state X1Σ+ of NaCs has been recently studied by laser induced fluorescence Fourier-transform spectroscopy [3]. Here we present the studies of the first triplet state a3Σ+ in NaCs.
The state a3Σ+ was studied by high resolution Fourier transform spectroscopy. Transitions to the triplet manifold with partially resolved hyperfine structure were observed by exciting the strongly mixed B1Π - c3Σ+ - b3Π system. The analysis of the long-range potential energy curves related to the atomic 3s(Na)+6s(Cs) asymptote provides important information for description of the interaction between a Na and a Cs atom in their ground states at low kinetic energies, thus cold temperatures. The present status of the investigation will be reported. The work is supported by DFG through SFB 407. O.D., M.T. and R.F. acknowledge the support by a NATO grant and by the EC 5th Frame Growth Grant.
[1] A.J. Kerman et al., Phys. Rev. Lett. 92, 033004 (2004)
[2] D. Wang et al., Phys. Rev. Lett., in print (arXiv:physics/0410220)
[3] O. Docenko et al., Eur. Phys. J D, in print