title: Molecular reorientation in collisions of OH + Ar.
abstract: Orientational effects in rotationally elastic collisions of OH with Ar were studied in a crossed molecular beam setup. A static electric field was applied to orient the molecules before the collision. After the collision the orientation was measured by using a narrow-band laser system to probe the Stark-split states corresponding to different orientations. Differential and integral cross sections for reorientation of the molecular axis have been determined as a function of the initial orientation. The cross section for reorientation by one quantum is 25 A2 with a preference for O-end collisions.
authors.affiliation: Department of Molecular and Laser Physics, University of Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands.
authors.forename: M C
authors.initials: MC
authors.lastname: van Beek
authors.forename: G
authors.initials: G
authors.lastname: Berden
authors.forename: H L
authors.initials: HL
authors.lastname: Bethlem
authors.forename: J J
authors.initials: JJ
authors.lastname: ter Meulen