State selected ion-molecule reactions by a TESICO technique. VIII. Vibronic-state dependence of the cross sections in the reaction NO+(a 3Σ+, ν; b 3Π, ν)

DOI: 10.1063/1.445779

Source and publish data:

Journal of Chemical Physics p. 5969 - 5974 (1983)

Update date:2022-08-16

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Authors:

Kato, Tatsuhisa

Tanaka, Kenichiro

Koyano, Inosuke

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Article abstract of DOI:10.1063/1.445779

Charge transfer reactions NO⁺ + Ar -> Ar⁺ + NO (1) have been studied by selecting the vibronic states of NO⁺ using the threshold electron-secondary ion coincidence (TESICO) technique.The vibronic states selected were a ³Σ⁺, ν = 0-5 and b ³Π, ν = 0, for each of which the relative cross sections have been determined at two collision energies 1.4 and 5.8 eV.The cross section for the a ³Σ⁺ state has been found to show a resonancelike enhancement at ν = 2.This feature is reproduced fairly well by the simple two-state theory of Rapp and Francis combined with the consideration of the Franck-Condon factors.However, a closer comparison of the theoretical and experimental results over the entire range of ν reveals that the reaction cross sections for the a ³Σ⁺ reactant ion state consist of two components, one in which the vibrational-state dependence is determined simply by the energy defects and Franck-Condon factors, and the other in which the vibrational-state dependence cannot be interpreted by those factors.The cross section for the b ³Π, ν = 0 state has been found to be much smaller than those for the exoergic reactions of the a ³Σ⁺ state (ν = 1-5).This has been attributed to the difference in the nature of the molecular orbitals that play primary roles in the a ³Σ⁺ and b ³Π reactions.

Full text of DOI:10.1063/1.445779

State selected ion–molecule reactions by a TESICO technique. VIII. Vibronicstate

dependence of the cross sections in the reaction NO+(a 3Σ+,v ; b 3Π,v)+Ar→NO+Ar+

Tatsuhisa Kato, Kenichiro Tanaka, and Inosuke Koyano

Citation: The Journal of Chemical Physics 79 , 5969 (1983); doi: 10.1063/1.445779

View online: http://dx.doi.org/10.1063/1.445779

View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/79/12?ver=pdfcov

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