Dissociative Recombination of CH<sup>+</sup> 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<inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mo>+</mo> </msup> </sem...
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MDPI AG
2019-08-01
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| Online Access: | https://www.mdpi.com/2218-2004/7/3/82 |
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| author | Zsolt J. Mezei Michel D. Epée Epée Ousmanou Motapon Ioan F. Schneider |
| author_facet | Zsolt J. Mezei Michel D. Epée Epée Ousmanou Motapon Ioan F. Schneider |
| author_sort | Zsolt J. Mezei |
| collection | DOAJ |
| description | We used the multichannel quantum defect theory to compute cross sections and rate coefficients for the dissociative recombination of CH<inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mo>+</mo> </msup> </semantics> </math> </inline-formula> initially in its lowest vibrational level <inline-formula> <math display="inline"> <semantics> <mrow> <msubsup> <mi>v</mi> <mi>i</mi> <mo>+</mo> </msubsup> <mo>=</mo> <mn>0</mn> </mrow> </semantics> </math> </inline-formula> with electrons of incident energy below <inline-formula> <math display="inline"> <semantics> <mrow> <mn>0.2</mn> </mrow> </semantics> </math> </inline-formula> eV. We have focused on the contribution of the 2 <inline-formula> <math display="inline"> <semantics> <mrow> <msup> <mrow></mrow> <mn>2</mn> </msup> <mo>Π</mo> </mrow> </semantics> </math> </inline-formula> 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 <inline-formula> <math display="inline"> <semantics> <mrow> <mo>(</mo> <msubsup> <mi>N</mi> <mi>i</mi> <mo>+</mo> </msubsup> <mo>=</mo> <mn>0</mn> <mo>,</mo> <mo>⋯</mo> <mo>,</mo> <mn>10</mn> <mo>)</mo> </mrow> </semantics> </math> </inline-formula> 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. |
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| issn | 2218-2004 |
| language | English |
| last_indexed | 2024-12-10T08:56:48Z |
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| spelling | doaj.art-f952734aead94b30baed267d3b0448ea2022-12-22T01:55:24ZengMDPI AGAtoms2218-20042019-08-01738210.3390/atoms7030082atoms7030082Dissociative Recombination of CH<sup>+</sup> Molecular Ion Induced by Very Low Energy ElectronsZsolt J. Mezei0Michel D. Epée Epée1Ousmanou Motapon2Ioan F. Schneider3Institute for Nuclear Research, Hungarian Academy of Sciences, H-4001 Debrecen, HungaryUFD Mathématiques, Informatique Appliquée et Physique Fondamentale, University of Douala, Douala PO Box 24157, CameroonUFD Mathématiques, Informatique Appliquée et Physique Fondamentale, University of Douala, Douala PO Box 24157, CameroonLaboratoire Ondes & Milieux Complexes CNRS-UMR6294, Université du Havre, Normandie Université, F-76058 Le Havre, FranceWe used the multichannel quantum defect theory to compute cross sections and rate coefficients for the dissociative recombination of CH<inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mo>+</mo> </msup> </semantics> </math> </inline-formula> initially in its lowest vibrational level <inline-formula> <math display="inline"> <semantics> <mrow> <msubsup> <mi>v</mi> <mi>i</mi> <mo>+</mo> </msubsup> <mo>=</mo> <mn>0</mn> </mrow> </semantics> </math> </inline-formula> with electrons of incident energy below <inline-formula> <math display="inline"> <semantics> <mrow> <mn>0.2</mn> </mrow> </semantics> </math> </inline-formula> eV. We have focused on the contribution of the 2 <inline-formula> <math display="inline"> <semantics> <mrow> <msup> <mrow></mrow> <mn>2</mn> </msup> <mo>Π</mo> </mrow> </semantics> </math> </inline-formula> 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 <inline-formula> <math display="inline"> <semantics> <mrow> <mo>(</mo> <msubsup> <mi>N</mi> <mi>i</mi> <mo>+</mo> </msubsup> <mo>=</mo> <mn>0</mn> <mo>,</mo> <mo>⋯</mo> <mo>,</mo> <mn>10</mn> <mo>)</mo> </mrow> </semantics> </math> </inline-formula> 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.https://www.mdpi.com/2218-2004/7/3/82dissociative recombinationmultichannel quantum defect theorylow temperature laboratory plasmasdiffuse molecular clouds |
| spellingShingle | Zsolt J. Mezei Michel D. Epée Epée Ousmanou Motapon Ioan F. Schneider Dissociative Recombination of CH<sup>+</sup> Molecular Ion Induced by Very Low Energy Electrons Atoms dissociative recombination multichannel quantum defect theory low temperature laboratory plasmas diffuse molecular clouds |
| title | Dissociative Recombination of CH<sup>+</sup> Molecular Ion Induced by Very Low Energy Electrons |
| title_full | Dissociative Recombination of CH<sup>+</sup> Molecular Ion Induced by Very Low Energy Electrons |
| title_fullStr | Dissociative Recombination of CH<sup>+</sup> Molecular Ion Induced by Very Low Energy Electrons |
| title_full_unstemmed | Dissociative Recombination of CH<sup>+</sup> Molecular Ion Induced by Very Low Energy Electrons |
| title_short | Dissociative Recombination of CH<sup>+</sup> Molecular Ion Induced by Very Low Energy Electrons |
| title_sort | dissociative recombination of ch sup sup molecular ion induced by very low energy electrons |
| topic | dissociative recombination multichannel quantum defect theory low temperature laboratory plasmas diffuse molecular clouds |
| url | https://www.mdpi.com/2218-2004/7/3/82 |
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