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American Association for the Advancement of Science, Science, 5793(313), p. 1617-1620, 2006

DOI: 10.1126/science.1131867

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Near-Threshold Inelastic Collisions Using Molecular Beams with a Tunable Velocity

Journal article published in 2006 by Joop J. Gilijamse, Steven Hoekstra ORCID, Sebastiaan Y. T. van de Meerakker, Sebastiaan Y. T. van de Meerakker, Gerrit C. Groenenboom ORCID, Gerard J. M. Meijer
This paper is available in a repository.
This paper is available in a repository.

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Abstract

Molecular scattering behavior has generally proven difficult to study at low collision energies. We formed a molecular beam of OH radicals with a narrow velocity distribution and a tunable absolute velocity by passing the beam through a Stark decelerator. The transition probabilities for inelastic scattering of the OH radicals with Xe atoms were measured as a function of the collision energy in the range of 50 to 400 wavenumbers, with an overall energy resolution of about 13 wavenumbers. The behavior of the cross-sections for inelastic scattering near the energetic thresholds was accurately measured, and excellent agreement was obtained with cross-sections derived from coupled-channel calculations on ab initio computed potential energy surfaces.