Communications: When diffraction rules the stereodynamics of rotationally inelastic collisions Journal Article


Author(s): Lemeshko, Mikhail P; Jambrina, Pablo G; De Miranda, Marcelo P; Friedrich, Břetislav
Article Title: Communications: When diffraction rules the stereodynamics of rotationally inelastic collisions
Affiliation
Abstract: Following upon our recent work on vector correlations in the Ar-NO collisions [Lemeshko and Friedrich, Phys. Chem. Chem. Phys. 12, 1038 (2010)], we compare model results with close-coupling calculations for a range of channels and collision energies for the He-NO system. The striking agreement between the model and exact polarization moments indicates that the stereodynamics of rotationally inelastic atom-molecule collisions at thermal energies is governed by diffraction of matter waves from a two-dimensional repulsive core of the atom-molecule potential. Furthermore, the model polarization moments characterizing the He-NO, He- O2, He-OH, and He-CaH stereodynamics are found to coalesce into a single, distinctive pattern, which can serve as a "fingerprint" to identify diffraction-driven stereodynamics in future work.
Keywords: Matter waves; Atom-molecule collisions; Close coupling calculation; Collision energies; Model results; Polarization moments; Rotationally inelastic collision; Stereodynamics; Vector correlations
Journal Title: Journal of Chemical Physics
Volume: 132
Issue 16
ISSN: 1089-7690
Publisher: American Institute of Physics  
Date Published: 2010-04-28
Start Page: Article number: 161102
Sponsor: Financial support of the Spanish Ministry of Science and Innovation (Grant No. CTQ2008-02578) is gratefully acknowledged.
URL:
DOI: 10.1063/1.3386530
Open access: yes (repository)