Isotope effect on the formation of CN by radiative association reactions
The formation of CN and its isotopologue C15N through radiative association has been investigated. We considered two processes for the collisions of ground state C(3P) and N(4S) atoms (A2Π → X2Σ+ and b4Π → a4Σ+), as well as, for the first time, we investigated the radiative association of ground sta...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2024-03-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0192682 |
| _version_ | 1797227647086886912 |
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| author | L. Giani M. Šimsová née Zámečníková G. Di Genova C. Ceccarelli N. Balucani G. Nyman |
| author_facet | L. Giani M. Šimsová née Zámečníková G. Di Genova C. Ceccarelli N. Balucani G. Nyman |
| author_sort | L. Giani |
| collection | DOAJ |
| description | The formation of CN and its isotopologue C15N through radiative association has been investigated. We considered two processes for the collisions of ground state C(3P) and N(4S) atoms (A2Π → X2Σ+ and b4Π → a4Σ+), as well as, for the first time, we investigated the radiative association of ground state C(3P) and excited N(2D) atoms (B2Σ+ → X2Σ+). The cross-sections for the three processes have been calculated using semi-classical, quantum mechanical, and Breit–Wigner theories. The rate constants, derived from the combination of semi-classical and Breit–Wigner results, have been fitted to the Kooij formula to be used in astrochemical modeling. The rate constant for the B2Σ+ → X2Σ+ process dominates in the investigated temperature range (10–10 000 K), when its own asymptotic energy is used as a reference level. Moreover, the B2Σ+ → X2Σ+ process presents the most pronounced isotope effect on the rate constant. We suggest considering these newly investigated radiative association processes for the formation of CN and C15N in the interstellar medium. |
| first_indexed | 2024-04-24T14:44:07Z |
| format | Article |
| id | doaj.art-ad0b2ae069534b8991155c55e8a6630d |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-24T14:44:07Z |
| publishDate | 2024-03-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-ad0b2ae069534b8991155c55e8a6630d2024-04-02T20:29:17ZengAIP Publishing LLCAIP Advances2158-32262024-03-01143035109035109-1010.1063/5.0192682Isotope effect on the formation of CN by radiative association reactionsL. Giani0M. Šimsová née Zámečníková1G. Di Genova2C. Ceccarelli3N. Balucani4G. Nyman5Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, FranceDepartment of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 40530 Göteborg, SwedenDipartimento di Chimica, Biologia e Biotecnologie, Universita degli Studi di Perugia, Perugia 06123, ItalyUniv. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, FranceUniv. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, FranceDepartment of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 40530 Göteborg, SwedenThe formation of CN and its isotopologue C15N through radiative association has been investigated. We considered two processes for the collisions of ground state C(3P) and N(4S) atoms (A2Π → X2Σ+ and b4Π → a4Σ+), as well as, for the first time, we investigated the radiative association of ground state C(3P) and excited N(2D) atoms (B2Σ+ → X2Σ+). The cross-sections for the three processes have been calculated using semi-classical, quantum mechanical, and Breit–Wigner theories. The rate constants, derived from the combination of semi-classical and Breit–Wigner results, have been fitted to the Kooij formula to be used in astrochemical modeling. The rate constant for the B2Σ+ → X2Σ+ process dominates in the investigated temperature range (10–10 000 K), when its own asymptotic energy is used as a reference level. Moreover, the B2Σ+ → X2Σ+ process presents the most pronounced isotope effect on the rate constant. We suggest considering these newly investigated radiative association processes for the formation of CN and C15N in the interstellar medium.http://dx.doi.org/10.1063/5.0192682 |
| spellingShingle | L. Giani M. Šimsová née Zámečníková G. Di Genova C. Ceccarelli N. Balucani G. Nyman Isotope effect on the formation of CN by radiative association reactions AIP Advances |
| title | Isotope effect on the formation of CN by radiative association reactions |
| title_full | Isotope effect on the formation of CN by radiative association reactions |
| title_fullStr | Isotope effect on the formation of CN by radiative association reactions |
| title_full_unstemmed | Isotope effect on the formation of CN by radiative association reactions |
| title_short | Isotope effect on the formation of CN by radiative association reactions |
| title_sort | isotope effect on the formation of cn by radiative association reactions |
| url | http://dx.doi.org/10.1063/5.0192682 |
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