Quasiclassical model for resonance widths in quantal collinear reactive scattering

Journal Article · Tue Jun 15 04:00:00 EDT 1982 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.442983· OSTI ID:5287439

Pollak, E

A quasiclassical model with no adjustable parameters is proposed for analysis of resonance widths of collinear atom--diatom reactions. We find two important contributions to the widths. One comes from tunneling through adiabatic exit channel barriers. The other involves the stability frequency of resonant periodic orbits. This frequency, if it is imaginary, is a measure of the nonadiabatic coupling in the system. We find that the resonances of the H+HH exchange reaction are determined by this nonadiabatic coupling. The higher lying resonances of the H+MuH system are controlled by the tunneling mechanism. We find that the resonant periodic orbit of the HMuH reaction is stable over a large energy range. The implications of this stability on analysis of quantal computations are discussed in detail.

• Research Organization: Department of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel
• OSTI ID: 5287439
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 76:12; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640303 -- Atomic
Molecular & Chemical Physics-- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CHEMICAL REACTIONS
COLLISIONS
ELEMENTS
HYDROGEN
MATHEMATICAL MODELS
MESIC MOLECULES
MOLECULE COLLISIONS
MOLECULES
MUONIC MOLECULES
NONMETALS
PROBABILITY