title: Resonances in rotationally inelastic scattering of NH3 and ND3 with H2.
abstract: We present theoretical studies on the scattering resonances in rotationally inelastic collisions of NH3 and ND3 molecules with H2 molecules. We use the quantum close-coupling method to compute state-to-state integral and differential cross sections for the NH3/ND3-H2 system for collision energies between 5 and 70 cm(-1), using a previously reported potential energy surface [Maret et al., Mon. Not. R. Astron. Soc. 399, 425 (2009)]. We identify the resonances as shape or Feshbach resonances. To analyze these, we use an adiabatic bender model, as well as examination at the scattering wave functions and lifetimes. The strength and width of the resonance peaks suggest that they could be observed in a crossed molecular beam experiment involving a Stark-decelerated NH3 beam.
authors.affiliation: Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218-2685, USA.
authors.forename: Qianli
authors.initials: Q
authors.lastname: Ma
authors.affiliation: Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands.
authors.forename: Ad
authors.initials: A
authors.lastname: van der Avoird
authors.affiliation: Service de Chimie Quantique et Photophysique C. P. 160/09, Université Libre de Bruxelles (ULB), 50 Ave. F. D. Roosevelt, 1050 Brussels, Belgium.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Loreau
authors.affiliation: Department of Chemistry and Biochemistry and Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742-2021, USA.
authors.forename: Millard H
authors.initials: MH
authors.lastname: Alexander
authors.affiliation: Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands.
authors.forename: Sebastiaan Y T
authors.initials: SY
authors.lastname: van de Meerakker
authors.affiliation: Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218-2685, USA.
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Dagdigian