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Reassessment of the...
Reassessment of the dissociative recombination of n2h+ at cryring
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- Vigren, Erik (author)
- Stockholms universitet,Fysikum
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- Zhaunerchyk, Vitali (author)
- Stockholms universitet,Fysikum
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- Hamberg, Mathias (author)
- Stockholms universitet,Fysikum
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Kaminska, M. (author)
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Semaniak, J. (author)
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- af Ugglas, Magnus (author)
- Stockholms universitet,Fysikum
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- Larsson, Mats (author)
- Stockholms universitet,Fysikum
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- Thomas, Richard (author)
- Stockholms universitet,Fysikum
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- Geppert, Wolf D. (author)
- Stockholms universitet,Fysikum
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(creator_code:org_t)
- 2012
- 2012
- English.
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In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 757:1, s. 34-
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The dissociative recombination (DR) of N2H+ has been reinvestigated at the heavy ion storage ring CRYRING at the Manne Siegbahn Laboratory in Stockholm, Sweden. Thermal rate coefficients for electron temperatures between 10 and 1000 K have been deduced. We show that electron recombination is expected to play an approximately equally important role as CO in the removal of N2H+ in dark interstellar clouds. We note that a deeper knowledge on the influence of the ions' rotational temperature in the DR of N2H+ would be helpful to set further constraints on the relative importance of the different destruction mechanisms for N2H+ in these environments. The branching fractions in the DR of N2H+ have been reinvestigated at similar to 0 eV relative kinetic energy, showing a strong dominance of the N-2 + H production channel (93(-2)(+4)%) with the rest leading to NH + N. These results are in good agreement with flowing afterglow experiments and in disagreement with an earlier measurement at CRYRING.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- astrochemistry
- molecular processes
Publication and Content Type
- ref (subject category)
- art (subject category)
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