Fragmentation mechanisms from three-dimensional wave packet studies: Vibrational predissociation of NeCl sub 2 , HeCl sub 2 , NeICl, and HeICl
- Theoretical Chemistry Group, Chemistry Division, Argonne National Laboratory, Argonne, IL (USA)
- Department of Chemistry, Northern Illinois University, DeKalb, IL (USA)
We present three-dimensional, time-dependent quantum studies on the van der Waals vibrational predissociation reactions of NeCl{sub 2}, HeCl{sub 2}, NeICl, and HeICl. A wave packet/basis set expansion approach is employed. The results for these systems agree reasonably well with experiment and time-independent quantum calculations, where available. The similarities and differences among the four systems are explored by detailed inspection of the propagating wave function. The rotational product distributions can be understood in terms of a unified fragmentation mechanism that depends on the product of the initial probability density with a classical force, and short time dynamics. Quantum interference effects are shown to play an important role in the helium cases. A semiclassical model is also advanced to account for some features of the product distributions.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5852195
- Journal Information:
- Journal of Chemical Physics; (USA), Vol. 94:4; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HELIUM CHLORIDES
PREDISSOCIATION
NEON CHLORIDES
NEON IODIDES
ADDUCTS
DISSOCIATION
FRAGMENTATION
VAN DER WAALS FORCES
VIBRATIONAL STATES
WAVE FUNCTIONS
CHLORIDES
CHLORINE COMPOUNDS
ENERGY LEVELS
EXCITED STATES
FUNCTIONS
HALIDES
HALOGEN COMPOUNDS
HELIUM COMPOUNDS
IODIDES
IODINE COMPOUNDS
NEON COMPOUNDS
RARE GAS COMPOUNDS
400201* - Chemical & Physicochemical Properties