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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 731545.0, MPI für Astronomie / Publikationen_mpia
Ultra-low-temperature reactions of carbon atoms with hydrogen molecules
Authors:Krasnokutski, S. A.; Kuhn, M.; Renzler, M.; Jäger, C.; Henning, T.; Scheier, P.
Date of Publication (YYYY-MM-DD):2016
Title of Journal:The Astrophysical Journal Letters
Volume:818
Issue / Number:2
Start Page:id. L31 (5 pp)
Audience:Not Specified
Abstract / Description:The reactions of carbon atoms with dihydrogen have been investigated in liquid helium droplets at T = 0.37 K. A calorimetric technique was applied to monitor the energy released in the reaction. The barrierless reaction between a single carbon atom and a single dihydrogen molecule was detected. Reactions between dihydrogen clusters and carbon atoms have been studied by high-resolution mass spectrometry. The formation of hydrocarbon cations of the type {{{C}}}m{{{{H}}}n}+ with m = 1–4 and n = 1–15 was observed. With enhanced concentration of dihydrogen, the mass spectra demonstrated the main “magic” peak assigned to the {{{CH}}5}+ cation. A simple formation pathway and the high stability of this cation suggest its high abundance in the interstellar medium.
Free Keywords:astrochemistry; ISM: atoms; ISM: molecules; methods: laboratory: molecular
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X
URL:http://cdsads.u-strasbg.fr/abs/2016ApJ...818L..31K
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