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DISSOCIATIVE RECOMBINATION MEASUREMENTS OF NH+ USING AN ION STORAGE RING
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Number of Authors: 152014 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 792, no 2, article id 132Article in journal (Refereed) Published
Abstract [en]

We have investigated dissociative recombination (DR) of NH+ with electrons using a merged beams configuration at the TSR heavy-ion storage ring located at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. We present our measured absolute merged-beams recombination rate coefficient for collision energies from 0 to 12 eV. From these data, we have extracted a cross section, which we have transformed to a plasma rate coefficient for the collisional plasma temperature range from T-p1 = 10 to 18,000 K. We show that the NH+ DR rate coefficient data in current astrochemical models are underestimated by up to a factor of approximately nine. Our new data will result in predicted NH+ abundances lower than those calculated by present models. This is in agreement with the sensitivity limits of all observations attempting to detect NH+ in interstellar clouds.

Place, publisher, year, edition, pages
2014. Vol. 792, no 2, article id 132
Keywords [en]
astrochemistry, ISM: clouds, ISM: molecules, methods: laboratory: molecular, molecular data, molecular processes
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-169683DOI: 10.1088/0004-637X/792/2/132ISI: 000341172200050OAI: oai:DiVA.org:su-169683DiVA, id: diva2:1324354
Available from: 2019-06-13 Created: 2019-06-13 Last updated: 2019-06-13Bibliographically approved

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Novotný, O.Geppert, WolfYang, B.Wolf, A.Savin, D. W.
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