title: Close coupling results for inelastic collisions of NH3 and Ar.  A stringent test of a spectroscopic potential.
abstract: We have calculated state-to-state total cross sections for rotational excitation and inversion of NH3 by collisions with Ar using the close coupling method. The Ar-NH3 interaction potential has been obtained from a fit to the spectrum of this van der Waals molecule. The calculated cross sections agree to within about 30% with the measured values; the estimated error in the latter is 10% to 20%.
authors.affiliation: Institute of Theoretical Chemistry, University of Nijmegen, Toerooiveld, The Netherlands.
authors.forename: G C
authors.initials: GC
authors.lastname: van der Sanden
authors.forename: P E
authors.initials: PE
authors.lastname: Wormer
authors.forename: A
authors.initials: A
authors.lastname: van der Avoird
authors.forename: C A
authors.initials: CA
authors.lastname: Schmuttenmaer
authors.forename: R J
authors.initials: RJ
authors.lastname: Saykally
mesh_terms: D000641:Ammonia / Q000737:chemistry*; D001128:Argon / Q000737:chemistry*; D008958:Models, Molecular; D055585:Physical Phenomena; D010825:Physics; D012984:Software
chemical_list: D001128:Argon; D000641:Ammonia