Journal ArticleDOI
Reactions of Ba Atoms with NO2, O3 and Cl2: Dynamic Consequences of the Divalent Nature of Barium
H. Floyd Davis,Arthur G. Suits,Hongtao Hou,Yuan T. Lee +3 more
- Vol. 94, Iss: 11, pp 1193-1201
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TLDR
The role of the divalent nature of barium atoms in chemical reactivity was explored using crossed molecular beams in this article, which indicated the existence of long-lived collision intermediates despite very large reaction exothermicities.Abstract:
The role of the divalent nature of barium atoms in chemical reactivity was explored using crossed molecular beams. Angular and velocity distributions of products from reactions of Ba(1S) with NO2 and O3 indicate the existence of long lived collision intermediates despite very large reaction exothermicities. The existence of these intermediates results from barriers to transfer of the second electron necessary to form ground state products. Although BaO was the dominant product in both reactions, two previously unknown channels were observed: Ba + N02 BaON + O and Ba + O3 BaO2 + O. We obtained bond dissociation energies of D0(Ba–ON) = 270 ± 80 kJ/mol and D0(Ba – O2) = 500 ± 80 kJ/mol for these molecules. The dependence of the cross sections for the ion channels, Ba(1P) + Cl2 Ba+ + Cl−2 and Ba(1P) + Cl2 BaCl+ + Cl− on Ba(1P) orbital alignment and collision energy was used to probe the course of the reaction through intersections between the ionic and covalent potential energy surfaces.read more
Citations
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Journal ArticleDOI
Transition state in metal atom reactions
TL;DR: In this paper, the transition state in metal molecule reactions has been approached by several experimental methods, crossed beams, transition state spectroscopy and more briefly via time dependent femtosecond localization.
Journal ArticleDOI
Alkali-hydrogen reactions
King-Chuen Lin,Raymond Vetter +1 more
TL;DR: In this article, a series of heat-pipe oven and crossed-beam experiments have been carried out over the Li + H 2, Na+H 2, K+H2, Rb +H 2 and Cs +H2 reactions, in which high resolution optical techniques have been used for reagent excitation and product characterization.
Journal ArticleDOI
Dynamics of reactive collisions by optical methods
A. González Ureña,R. Vetter +1 more
TL;DR: In this article, a review of recent developments in the study of reactive collisions using optical methods is presented, focusing on the conceptual and theoretical aspects of the physics underlying modern reaction dynamics.
Journal ArticleDOI
Reactive collisions with excited-state atoms
A. Gonzalez‐Urena,R. Vetter +1 more
TL;DR: In this paper, a review of recent developments in the study of reactive collisions with excited-state atoms, under single-collision conditions provided by crossed-beam and low-pressure gas cell experiments is presented.
Journal ArticleDOI
Cluster isolated chemical reactions : evidence for the formation of ba2o in oxidation reactions of barium dimers
TL;DR: In this article, the authors used the cluster isolated chemical reaction (CICR) technique to study the reaction Ba2 + N2O on (N2)8000 clusters and the reaction BA2 + CO2 on (Ar)5500 clusters.
References
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Journal ArticleDOI
Binding Energy and Dipole Moment of Alkali Halide Molecules
TL;DR: In this article, a simple theory of alkali halide gas molecules in the spirit of Born-Mayer lattice theory is presented, where each molecule is constituted of ions, each of which is polarized by the electrostatic field of the other.
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Exchange reactions of alkali atoms with alkali halides: a collision complex mechanism
TL;DR: In this article, a mass spectrometer with a surface ionization filament was used to detect the reaction of Cs and K with RbCl and the reverse reaction of reverse reactions.
Journal ArticleDOI
Molecular beam studies of the F+H2 reaction
TL;DR: In this article, the dynamics of the F+H/sub 2/ reaction have been investigated in a high resolution crossed molecular beam study, and the results strongly suggest that dynamical resonances play a significant role in the reaction dynamics.
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Molecular Beam Reactive Scattering Apparatus with Electron Bombardment Detector
TL;DR: In this article, a crossed-beam detector for thermal energy neutral-neutral reactions is described, which consists of a high efficiency electron bombardment ionizer, quadrupole mass filter, scintillation ion counter, and gated scalers synchronized with the beam modulation.
Journal ArticleDOI
Long-range configuration interaction of ionic and covalent states
R. Grice,Dudley R. Herschbach +1 more
TL;DR: A simple approximation based on asymptotic wavefunctions is used to calculate the splitting ΔV(R c) between the pair of adiabatic potential energy curves that arise from pseudo-crossing of ionic and covalent states of a diatomic molecule at a large internuclear distance R c as discussed by the authors.