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Journal Article

Quantum-state resolved bimolecular collisions of velocity-controlled OH with NO radicals

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons21723

Kirste,  Moritz
Molecular Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22218

Wang,  Xingan
Molecular Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22066

Schewe,  Christian
Molecular Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21859

Meijer,  Gerard
Molecular Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21858

Meerakker,  Sebastiaan Y. T. van de
Molecular Physics, Fritz Haber Institute, Max Planck Society;
Radboud University Nijmegen, Institute for Molecules and Materials;

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Fulltext (public)

arXiv:1210.5947
(Preprint), 778KB

Supplementary Material (public)
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Citation

Kirste, M., Wang, X., Schewe, C., Meijer, G., Liu, K., van der Avoird, A., et al. (2012). Quantum-state resolved bimolecular collisions of velocity-controlled OH with NO radicals. Science, 338(6110), 1060-1063. doi:10.1126/science.1229549.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-1C21-9
Abstract
Whereas atom-molecule collisions have been studied with complete quantum state resolution, interactions between two state-selected molecules have proven much harder to probe. Here, we report the measurement of state-resolved inelastic scattering cross sections for collisions between two open-shell molecules that are both prepared in a single quantum state. Stark-decelerated OH radicals were scattered with hexapole-focused NO radicals in a crossed beam configuration. Rotationally and spin-orbit inelastic scattering cross sections were measured on an absolute scale for collision energies between 70 and 300 cm⁻¹. These cross sections show fair agreement with quantum coupled-channels calculations using a set of coupled model potential energy surfaces based on ab initio calculations for the long-range non-adiabatic interactions and a simplistic short-range interaction. This comparison reveals the crucial role of electrostatic forces in complex molecular collision processes.