Hannover 2010 – scientific programme

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MO: Fachverband Molekülphysik

MO 10: Poster: Spectroscopy in He Droplets

MO 10.3: Poster

Tuesday, March 9, 2010, 16:00–18:30, Lichthof

A phenomenological model for molecular dynamics on helium nanodroplets — •Martin Schlesinger¹, Walter T. Strunz¹, Marcel Mudrich², and Frank Stienkemeier² — ¹Institut für Theoretische Physik, TU Dresden, 01062 Dresden — ²Physikalisches Institut, Universität Freiburg, 79104 Freiburg

Superfluid helium nanodroplets serve as an an ideal “refrigerator” for high precision spectroscopy of embedded species. Recent experiments study vibrational dynamics of dimers attached to helium nanodroplets, employing femtosecond pump-probe spectroscopy [1]. Numerical calculations include a general damping of vibrational wave packets as well as desorption of dimers off the droplet [2]. While this model is sufficient to describe experimental findings in spin singlet systems, it may fail for other species attached to the droplets. We therefore extend our model and allow for decoherence mechanisms of different dimer degrees of freedom.

[1] P. Claas, G. Droppelmann, C. P. Schulz, M. Mudrich, and F. Stienkemeier, J. Phys. B: At. Mol. Opt. Phys. 39, 1151 (2006).

[2] M. Schlesinger, M. Mudrich, F. Stienkemeier, and W. T. Strunz, arXiv:0909.4691v1