Issue |
A&A
Volume 692, December 2024
|
|
---|---|---|
Article Number | A121 | |
Number of page(s) | 9 | |
Section | Atomic, molecular, and nuclear data | |
DOI | https://doi.org/10.1051/0004-6361/202451757 | |
Published online | 06 December 2024 |
Measurements and simulations of rate coefficients for the deuterated forms of the H2+ + H2 and H3+ + H2 reactive systems at low temperature
Max Planck Institute for Extraterrestrial Physics,
Gießenbachstraße 1,
85748
Garching,
Germany
★ Corresponding author; pjusko@mpe.mpg.de
Received:
1
August
2024
Accepted:
4
November
2024
The rate coefficients of various isotopic variations of the H2+ + H2 and H3+ + H2 reactions in the 10–250 K temperature range were measured using a cryogenic 22 pole radio frequency ion trap. The processes involving diatomic ions were found to behave close to the Langevin rate, whereas temperature-dependent rate coefficients were obtained for the four isotopic exchange processes with triatomic ions. Fitting the experimental data using a chemical code allowed us in specific cases to constrain rate coefficients that were not directly measured in the ion trap. The reported rate coefficients suggest a more efficient hydrogenation of deuterated H3+ forms than usually assumed in astrochemical models, which might affect deuteration rates in warmer environments.
Key words: astrochemistry / molecular processes / methods: laboratory: molecular / methods: numerical / astronomical databases: miscellaneous / ISM: molecules
© The Authors 2024
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This article is published in open access under the Subscribe to Open model.
Open Access funding provided by Max Planck Society.
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