Dissociative recombination and vibrational excitation of CO+: model calculations and comparison with experiment. (29th April 2015)

• Record Type: Journal Article
• Authors: Mezei, J Zs; Backodissa-Kiminou, R D; Tudorache, D E; Morel, V; Chakrabarti, K; Motapon, O; Dulieu, O; Robert, J; Tchang-Brillet, W-Ü L; Bultel, A; Urbain, X; Tennyson, J; Hassouni, K; Schneider, I F
• Is Part Of: Plasma sources science & technology. Volume 24:Number 3(2015:Jun.)
• Publication Date: 2015-04-29
• Subjects: dissociative recombination -- electron impact vibrational excitation -- vibrationally excited -- multichannel quantum defect theory; Plasma (Ionized gases) -- Periodicals; 530.44
• DOI: 10.1088/0963-0252/24/3/035005
• Languages: English
• ISSNs: 0963-0252

Abstract

Abstract: The latest molecular data—potential energy curves and Rydberg/valence interactions—characterizing the super-excited electronic states of CO are reviewed, in order to provide inputs for the study of their fragmentation dynamics. Starting from this input, the main paths and mechanisms for CO + dissociative recombination are analyzed; its cross sections are computed using a method based on multichannel quantum defect theory. Convoluted cross sections, giving both isotropic and anisotropic Maxwellian rate coefficients, are compared with merged-beam and storage-ring experimental results. The calculated cross sections underestimate the measured ones by a factor of two, but display a very similar resonant shape. These facts confirm the quality of our approach for the dynamics, and call for more accurate and more extensive molecular structure calculations.