Ion-Molecule Collisions, Electron Molecule Collisions, Excitation and Ionization of Atoms
Abstract
Corrected values of the dissociative recombination rate coefficient for N2(+)(v) have been deduced from an analysis of published experimental data. The theory of the dissociative recombination of polyatomic ions has been developed with particular reference to the branching ratios of the exothermic channels. The role of single-electron transitions in dissociative recombination has been discussed and it has been shown that the radiationless transition probability is indeed very high. Research on the dissociative recombination of CHO(+), H3(+) and D3(+) has led to the discovery of a new mechanism for dissociative recombination, characterized by the radiationless transition being of the single-electron type and by the absence of any crossing. It takes place through a multi-step process and is generally very rapid. Despite having been discovered only recently, it is of common occurrence. Extensive calculations on tidal termolecular ionic recombination have been performed. The discrepancies between the various results on CH3(+) + H2 and CH3(+) + D2 association have been discussed. The emission of the 557.7 nm line of OI, the Herzberg I bands of O2 and the Atmospheric bands of O2 have been satisfactorily explained. Rocket results on the emission of the 557.7 nm and 630.0 nm lines of OI from the nocturnal F-region have been analysed. A new theory of the nightglow's green continuum has been proposed: metastable oxygen molecules collide with the ambient gas molecules to form complexes that dissociate by allowed radiative transitions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 08, 1994
- Accession Number
- ADA284584
Entities
People
- Kenneth L. Bell
- Robert H. Reid
Organizations
- Queen's University Belfast