Stuttgart 2012 – scientific programme

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MO: Fachverband Molekülphysik

MO 21: Poster 3: Cluster, Collisions, Energy Transfer, Photochemistry, Spectroscopy in He-Droplets

MO 21.30: Poster

Thursday, March 15, 2012, 16:30–19:00, Poster.IV

Laser ablation as a method for doping helium nanodroplets — •Martin Singer, Raphael Katzy, and Frank Stienkemeier — Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany

Helium nanodroplet isolation has been proven to be a versatile method for spectroscopy at temperatures below 1K [1]. The variety of dopants to be loaded into the droplets depends crucially on available methods for producing atoms and molecules in the gas phase for the pick-up process. Besides gas cells and ovens also laser ablation has been established as a method for doping both fragile organic molecules and refractory metals [2].

A pulsed droplet source provides great advantages compared to a continuous beam in terms of gas load and droplet density. The inherently pulsed laser ablation source has so far only been used with continuous helium droplet sources. For the Low Density Matter endstation at the FERMI XUV free electron laser, we will combine a pulsed droplet source with a laser ablation setup. The design of the setup will be presented.

[1] J.P. Toennies, A.F. Vilesov, Angew. Chem. 43 (2004) 2622

[2] M. Mudrich et al., Rev. Sci. Instr. 78 , 103106 (2007)