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MO: Fachverband Molekülphysik
MO 21: Poster 3: Cluster, Collisions, Energy Transfer, Photochemistry, Spectroscopy in He-Droplets
MO 21.10: Poster
Thursday, March 15, 2012, 16:30–19:00, Poster.IV
Supersonic beams of neutral and ionic CO2 clusters — •Bo-Gaun Chen, Mona Kositzki, Klaus Rademann, and Wolfgang Christen — Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Str. 2, 12489 Berlin
The formation and growth of clusters in the gas phase is of fundamental relevance. Recent progress in experimental techniques1−3 and the advanced thermodynamic analysis of velocity distributions of supersonic jets4,5 permit an improved comprehension of these condensation processes.
We present a comprehensive investigation of CO2 cluster beams from sub- to supercritical source densities, covering cluster sizes from 3×102 to 3×105 molecules per particle.
In particular we report on the change (both increase and decrease) of the flow velocity with source density, the effect of source temperature on translational cooling, and compare the results for neutral and charged clusters.
1W. Christen, T. Krause, K. Rademann, Rev. Sci. Instrum. 78, 073106, 2007.
2W. Christen, T. Krause, B. Kobin, K. Rademann, J. Phys. Chem. A 115, 6997, 2011.
3K. Luria, W. Christen, U. Even, J. Phys. Chem. A 115, 7362, 2011.
4W. Christen, K. Rademann, Phys. Scr. 80, 048127, 2009.
5W. Christen, K. Rademann, U. Even, J. Phys. Chem. A 114, 11189, 2010.