Details

Autor(en) / Beteiligte

• Scharfenberg, Ludwig
• K os, Jacek
• Dagdigian, Paul J
• Alexander, Millard H
• Meijer, Gerard
• van de Meerakker, Sebastiaan Y. T

Titel

State-to-state inelastic scattering of Stark-decelerated OH radicals with Ar atoms

Ist Teil von

• Physical chemistry chemical physics : PCCP, 2010-01, Vol.12 (36), p.166-167

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2010

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The Stark deceleration method exploits the concepts of charged particle accelerator physics to produce molecular beams with a tunable velocity. These tamed molecular beams offer interesting perspectives for precise crossed beam scattering studies as a function of the collision energy. The method has advanced sufficiently to compete with state-of-the-art beam methods that are used for scattering studies throughout. This is demonstrated here for the scattering of OH radicals ( X 2 Π 3/2 , J = 3/2, f ) with Ar atoms, a benchmark system for the scattering of open-shell molecules with atoms. Parity-resolved integral state-to-state inelastic scattering cross sections are measured at collision energies between 80 and 800 cm −1 . The threshold behavior and collision energy dependence of 13 inelastic scattering channels is accurately determined. Excellent agreement is obtained with the cross sections predicted by close-coupling scattering calculations based on the most accurate ab initio OH + Ar potential energy surfaces to date. A new crossed beam apparatus is described and used on a benchmark system for atom-molecule collisions: OH + Ar.