Lack of M-preserving propensities in rotationally inelastic collisions of NO(X /sup 2/Pi/sub 1//sub ///sub 2/)
An expansion of the collision-frame scattering amplitude for JM..-->..J'M' transitions in irreducible tensor components facilitates the investigation of M-preserving propensities when quantization refers to the geometric or kinetic apse vectors. Specifically one can demonstrate that M preservation can be expected for processes where backward scattering dominates, but not for transitions which are forward peaked. For forward scattered processes involving open-shell diatomics, either even or odd changes in M (apse quantization) will be dominant, depending on the e/f symmetry label of the initial and final wave functions. These formal results will be illustrated by close-coupling calculations on collisions of NO(X /sup 2/Pi/sub 1//sub ///sub 2/).
- Research Organization:
- Department of Chemistry, University of Maryland, College Park, Maryland 20742
- OSTI ID:
- 6585412
- Journal Information:
- J. Chem. Phys.; (United States), Vol. 80:9
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ARGON
ATOM-MOLECULE COLLISIONS
NITRIC OXIDE
ENERGY-LEVEL TRANSITIONS
ROTATIONAL STATES
ATOM COLLISIONS
CHALCOGENIDES
COLLISIONS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
GASES
MOLECULE COLLISIONS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RARE GASES
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena