Dissociative Recombination Measurements of NH+ Using an Ion Storage Ring

Novotný, O.; Berg, M. H.; Bing, D.; Buhr, H.; Geppert, W.; Grieser, M.; Grussie, F.; Krantz, C.; Mendes, M. B.; Nordhorn, C.; Repnow, R.; Schwalm, D.; Yang , B.; Wolf, A.; Savin, D. W.

doi:10.1088/0004-637X/792/2/132

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Dissociative Recombination Measurements of NH⁺ Using an Ion Storage Ring

MPS-Authors

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Berg, M. H.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Bing, D.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Buhr, H.
Prof. Dirk Schwalm, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Grieser, M.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Grussie, F.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Krantz, C.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Mendes, M. B.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Nordhorn, C.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Repnow, R.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Schwalm, D.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

Yang , B.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Wolf, A.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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https://iopscience.iop.org/article/10.1088/0004-637X/792/2/132/pdf
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Citation

Novotný, O., Berg, M. H., Bing, D., Buhr, H., Geppert, W., Grieser, M., et al. (2014). Dissociative Recombination Measurements of NH⁺ Using an Ion Storage Ring. The Astrophysical Journal, 792(2): 132. doi:10.1088/0004-637X/792/2/132.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0025-690F-F

Abstract

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_pl = 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.