Enthalpy of the N+ + H2 → NH+ + H Reaction—Experimental Study of the Reverse Process
The formation of nitrogen hydrides in the interstellar medium is initiated by the nearly thermoneutral reaction of N ^+ + H _2 → NH ^+ + H. Here, we experimentally determine the enthalpy of this reaction using the principle of detailed balance from a measurement of the rate coefficient of the revers...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ad0bea |
| _version_ | 1797391440821616640 |
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| author | Štěpán Roučka Serhiy Rednyk Thuy Dung Tran Artem Kovalenko Dmytro Mulin Sunil S. Kumar Petr Dohnal Radek Plašil Juraj Glosík |
| author_facet | Štěpán Roučka Serhiy Rednyk Thuy Dung Tran Artem Kovalenko Dmytro Mulin Sunil S. Kumar Petr Dohnal Radek Plašil Juraj Glosík |
| author_sort | Štěpán Roučka |
| collection | DOAJ |
| description | The formation of nitrogen hydrides in the interstellar medium is initiated by the nearly thermoneutral reaction of N ^+ + H _2 → NH ^+ + H. Here, we experimentally determine the enthalpy of this reaction using the principle of detailed balance from a measurement of the rate coefficient of the reverse reaction NH ^+ + H → N ^+ + H _2 . The measurements were carried out in a linear radiofrequency 22-pole trap combined with an effusive beam source of atomic hydrogen at temperatures between 10 and 100 K. The resulting ground-state energy difference (or reaction enthalpy at 0 K) of Δ E ^0 = (18 ± 4) meV confirms that there are no significant energy barriers on the reaction path. |
| first_indexed | 2024-03-08T23:32:39Z |
| format | Article |
| id | doaj.art-547c4bb46e464e25b193fba167e7e40c |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-08T23:32:39Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-547c4bb46e464e25b193fba167e7e40c2023-12-14T10:13:37ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-01959212710.3847/1538-4357/ad0beaEnthalpy of the N+ + H2 → NH+ + H Reaction—Experimental Study of the Reverse ProcessŠtěpán Roučka0https://orcid.org/0000-0002-2419-946XSerhiy Rednyk1https://orcid.org/0000-0002-0408-0170Thuy Dung Tran2https://orcid.org/0000-0002-9894-1647Artem Kovalenko3https://orcid.org/0000-0001-9521-6821Dmytro Mulin4Sunil S. Kumar5https://orcid.org/0000-0002-1646-0517Petr Dohnal6https://orcid.org/0000-0003-0341-0382Radek Plašil7https://orcid.org/0000-0001-8520-8983Juraj Glosík8https://orcid.org/0000-0002-2638-9435Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University , Prague, V Holešovičkách 2, 180 00, Czech Republic ; stepan.roucka@mff.cuni.czDepartment of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University , Prague, V Holešovičkách 2, 180 00, Czech Republic ; stepan.roucka@mff.cuni.czDepartment of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University , Prague, V Holešovičkách 2, 180 00, Czech Republic ; stepan.roucka@mff.cuni.czDepartment of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University , Prague, V Holešovičkách 2, 180 00, Czech Republic ; stepan.roucka@mff.cuni.czDepartment of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University , Prague, V Holešovičkách 2, 180 00, Czech Republic ; stepan.roucka@mff.cuni.czDepartment of Physics and CAMOST, Indian Institute of Science Education and Research (IISER) Tirupati , Andhra Pradesh 517507, IndiaDepartment of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University , Prague, V Holešovičkách 2, 180 00, Czech Republic ; stepan.roucka@mff.cuni.czDepartment of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University , Prague, V Holešovičkách 2, 180 00, Czech Republic ; stepan.roucka@mff.cuni.czDepartment of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University , Prague, V Holešovičkách 2, 180 00, Czech Republic ; stepan.roucka@mff.cuni.czThe formation of nitrogen hydrides in the interstellar medium is initiated by the nearly thermoneutral reaction of N ^+ + H _2 → NH ^+ + H. Here, we experimentally determine the enthalpy of this reaction using the principle of detailed balance from a measurement of the rate coefficient of the reverse reaction NH ^+ + H → N ^+ + H _2 . The measurements were carried out in a linear radiofrequency 22-pole trap combined with an effusive beam source of atomic hydrogen at temperatures between 10 and 100 K. The resulting ground-state energy difference (or reaction enthalpy at 0 K) of Δ E ^0 = (18 ± 4) meV confirms that there are no significant energy barriers on the reaction path.https://doi.org/10.3847/1538-4357/ad0beaAstrochemistryReaction ratesLaboratory astrophysicsExperimental dataMolecular dataSmall molecules |
| spellingShingle | Štěpán Roučka Serhiy Rednyk Thuy Dung Tran Artem Kovalenko Dmytro Mulin Sunil S. Kumar Petr Dohnal Radek Plašil Juraj Glosík Enthalpy of the N+ + H2 → NH+ + H Reaction—Experimental Study of the Reverse Process The Astrophysical Journal Astrochemistry Reaction rates Laboratory astrophysics Experimental data Molecular data Small molecules |
| title | Enthalpy of the N+ + H2 → NH+ + H Reaction—Experimental Study of the Reverse Process |
| title_full | Enthalpy of the N+ + H2 → NH+ + H Reaction—Experimental Study of the Reverse Process |
| title_fullStr | Enthalpy of the N+ + H2 → NH+ + H Reaction—Experimental Study of the Reverse Process |
| title_full_unstemmed | Enthalpy of the N+ + H2 → NH+ + H Reaction—Experimental Study of the Reverse Process |
| title_short | Enthalpy of the N+ + H2 → NH+ + H Reaction—Experimental Study of the Reverse Process |
| title_sort | enthalpy of the n h2 nh h reaction experimental study of the reverse process |
| topic | Astrochemistry Reaction rates Laboratory astrophysics Experimental data Molecular data Small molecules |
| url | https://doi.org/10.3847/1538-4357/ad0bea |
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