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

M. Kirste; X. Wang; H.C. Schewe; G. Meijer; K. Liu; A. van der Avoird; L.M.C. Janssen; K.B. Gubbels; G.C. Groenenboom; S.Y.T. van de Meerakker

doi:10.1126/science.1229549

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

M. Kirste, X. Wang, H.C. Schewe, G. Meijer, K. Liu, A. van der Avoird, L.M.C. Janssen, K.B. Gubbels, G.C. Groenenboom, S.Y.T. van de Meerakker

Research output: Contribution to journal › Article › Academic › peer-review

113 Citations (Scopus)

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 hydroxyl (OH) radicals were scattered with hexapole-focused nitric oxide (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 nonadiabatic interactions and a simplistic short-range interaction. This comparison reveals the crucial role of electrostatic forces in complex molecular collision processes.

Original language	English
Pages (from-to)	1060-1063
Number of pages	4
Journal	Science
Volume	338
Issue number	6110
DOIs	https://doi.org/10.1126/science.1229549
Publication status	Published - 23 Nov 2012
Externally published	Yes

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title = "Quantum-state resolved bimolecular collisions of velocity-controlled OH with NO radicals",

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 hydroxyl (OH) radicals were scattered with hexapole-focused nitric oxide (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 nonadiabatic interactions and a simplistic short-range interaction. This comparison reveals the crucial role of electrostatic forces in complex molecular collision processes.",

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doi = "10.1126/science.1229549",

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T1 - Quantum-state resolved bimolecular collisions of velocity-controlled OH with NO radicals

AU - Kirste, M.

AU - Wang, X.

AU - Schewe, H.C.

AU - Meijer, G.

AU - Liu, K.

AU - van der Avoird, A.

AU - Janssen, L.M.C.

AU - Gubbels, K.B.

AU - Groenenboom, G.C.

AU - van de Meerakker, S.Y.T.

PY - 2012/11/23

Y1 - 2012/11/23

N2 - 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 hydroxyl (OH) radicals were scattered with hexapole-focused nitric oxide (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 nonadiabatic interactions and a simplistic short-range interaction. This comparison reveals the crucial role of electrostatic forces in complex molecular collision processes.

AB - 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 hydroxyl (OH) radicals were scattered with hexapole-focused nitric oxide (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 nonadiabatic interactions and a simplistic short-range interaction. This comparison reveals the crucial role of electrostatic forces in complex molecular collision processes.

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VL - 338

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EP - 1063

JO - Science

JF - Science

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ER -

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

Abstract

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