Dissociative Recombination of CH+ Molecular Ion Induced by Very Low Energy Electrons

We used the multichannel quantum defect theory to compute cross sections and rate coefficients for the dissociative recombination of CH + initially in its lowest vibrational level v i + = 0 with electrons of incident energy below 0.2 eV. We have focused on the contribution of the 2 2 Π state which i...

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Bibliographic Details
Published in:Atoms 2019, Vol.7 (3), p.82
Main Authors: Mezei, Zsolt J., Epée Epée, Michel D., Motapon, Ousmanou, Schneider, Ioan F.
Format: Article
Language:English
Subjects:
Boltzmann distribution
diffuse molecular clouds
dissociative recombination
Eigenvalues
Electrons
Ion recombination
low temperature laboratory plasmas
Mathematical analysis
Molecular ions
multichannel quantum defect theory
Nuclear cross sections
Rotational states
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Summary:We used the multichannel quantum defect theory to compute cross sections and rate coefficients for the dissociative recombination of CH + initially in its lowest vibrational level v i + = 0 with electrons of incident energy below 0.2 eV. We have focused on the contribution of the 2 2 Π state which is the main dissociative recombination route at low collision energies. The final cross section is obtained by averaging the relevant initial rotational states ( N i + = 0 , ⋯ , 10 ) with a 300 K Boltzmann distribution. The Maxwell isotropic rate coefficients for dissociative recombination are also calculated for different initial rotational states and for electronic temperatures up to a few hundred Kelvins. Our results are compared to storage-ring measurements.
ISSN:2218-2004
2218-2004
DOI:10.3390/atoms7030082