Experimental Study on CH+ Formation from Doubly Charged Carbon and Molecular Hydrogen

Autor: Oldřich Novotný, Serhiy Rednyk, Juraj Glosík, Thuy Dung Tran, Radek Plašil, Petr Dohnal, Štěpán Roučka, Artem Kovalenko
Rok vydání: 2021
Předmět:
Zdroj: The Astrophysical Journal. 910:155
ISSN: 1538-4357
0004-637X
DOI: 10.3847/1538-4357/abe86c
Popis: We studied the reaction of doubly charged carbon C2+ (C iii) with molecular hydrogen, a possible source of the high, unexplained abundances of interstellar CH+. The experiment was carried out using the cryogenic linear 22-pole radio frequency ion trap. The measured reaction rate coefficient amounts to (1.5 ± 0.2) × 10−10 cm3 s−1, nearly independently of the covered temperature range from 15 to 300 K. In the product distribution study, the C+ ion was identified as the dominant product of the reaction. For the CH+ production, we determine an upper limit for the reaction rate coefficient at 2 × 10−12 cm3 s−1.
Databáze: OpenAIRE