Dresden 2011 – scientific programme

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MO: Fachverband Molekülphysik

MO 8: Poster: Spectroscopy in He Droplets

MO 8.4: Poster

Monday, March 14, 2011, 16:00–18:00, P1

Femtosecond vibrational wavepacket spectroscopy of mixed rubidium and potassium trimers formed on helium nanodroplets — Christian Giese¹, Frank Stienkemeier¹, •Marcel Mudrich¹, Andreas Hauser², and Wolfgang Ernst² — ¹Physikalisches Institut, Universität Freiburg, Germany — ²Institut für Experimentalphysik, Technische Universität Graz, Austria

Femtosecond wave packet spectroscopy of alkali molecules attached to helium nanodroplets provide high resolution vibrational spectra of weakly bound high-spin states [1]. We present pump-probe measurements of all combinations of homo- and heteronuclear rubidium-potassium trimers in the quartet manifold. The measured Fourier spectra are assigned to vibrational modes by comparison with high level ab-initio calculations that include spin-orbit and Jahn-Teller interactions [2]. In K₃ and Rb₃ wave packet dynamics in the states 1⁴A₂′ and 2⁴E₂′ is observed, in KRb₂ and K₂Rb dynamics in the states 1⁴B₂, 3⁴A₁ and 4⁴B₂ is probed.
M. Mudrich, Ph. Heister, Th. Hippler, Ch. Giese, O. Dulieu, and F. Stienkemeier, Phys. Rev. A 80, 042512 (2009)
A. W. Hauser, G. Auböck, C. Callegari, and W. E. Ernst, J. Chem. Phys. 132, 164310 (2010)