Rotational distributions from photodissociations. I. Linear triatomic molecules
The generalized Franck--Codon theory of the collinear dissociation of linear triatomic molecules is presented, including a proper description of the bending vibrations in the initial bound electronic state and of the rotational motions on both the initial and the final repulsive electronic surface. The nonseparable multidimensional bound--continuum Franck--Condon integrals are reduced to a rapidly convergent series of products of one dimensional integrals. Analytical expressions are derived for rotational and orbital angular momentum distributions of the products, for scalar coupling (as in predissociations), as well as parallel and perpendicular transitions (as in direct photodissociation). This fully quantum mechanical theory makes explicit the separate and interrelated roles played by angular momentum and energy conservation. The present work is applied in a separate paper to the photodissociation of ICN, and qualitative agrement with experiment is obtained.
- Research Organization:
- James Franck Institute and Department of Chemistry, University of Chicago, Chicago, Illinois 60637
- OSTI ID:
- 6135832
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 70:8; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics
74 ATOMIC AND MOLECULAR PHYSICS
AMPLITUDES
COLLISIONS
DISSOCIATION
ENERGY
ENERGY LEVELS
EXCITED STATES
MOLECULE COLLISIONS
MOLECULES
PHOTON COLLISIONS
PHOTON-MOLECULE COLLISIONS
POLYATOMIC MOLECULES
POTENTIAL ENERGY
ROTATIONAL STATES
TRANSITION AMPLITUDES