The interstellar synthesis of ammonia

The reaction H3+ + N → NH2+ +H has been measured in the laboratory at room temperature for the first time. It is sufficiently fast (k = 4.5 × 10−10 cm3 s−1) to provide a larger source of NH3 in dense interstellar clouds at 10 K than the more widely accepted source N+ + H2. At 50 K, both ion-molecule...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 1997-10, Vol.290 (4), p.636-638
Main Authors: Scott, Graham B. I., Freeman, Colin G., McEwan, Murray J.
Format: Article
Language:English
Subjects:
ISM: abundances
ISM: atoms
ISM: molecules
molecular processes
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Summary:The reaction H3+ + N → NH2+ +H has been measured in the laboratory at room temperature for the first time. It is sufficiently fast (k = 4.5 × 10−10 cm3 s−1) to provide a larger source of NH3 in dense interstellar clouds at 10 K than the more widely accepted source N+ + H2. At 50 K, both ion-molecule mechanisms (H3+ + N and N+ + H2) may provide roughly equivalent sources of NH3.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/290.4.636