| Autor: |
Štěpán Roučka, Serhiy Rednyk, Thuy Dung Tran, Artem Kovalenko, Dmytro Mulin, Sunil S. Kumar, Petr Dohnal, Radek Plašil, Juraj Glosík |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
The Astrophysical Journal, Vol 959, Iss 2, p 127 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
1538-4357 |
| DOI: |
10.3847/1538-4357/ad0bea |
| Popis: |
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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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