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Journal Article

Dissociative Recombination Measurements of HCl+ Using an Ion Storage Ring

MPS-Authors
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Becker,  Arno
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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

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Kreckel,  H.
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;
Institut für Atom- und Molekülphysik, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany ;

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Spruck,  Kaija
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Stützel,  J
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USA ;

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

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Citation

Novotný, O., Becker, A., Buhr, H., Domesle, C., Geppert, W., Grieser, M., et al. (2013). Dissociative Recombination Measurements of HCl+ Using an Ion Storage Ring. The Astrophysical Journal, 777(1): 54. doi:10.1088/0004-637X/777/1/54.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0014-A555-0
Abstract
We have measured dissociative recombination (DR) of HCl+ 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 the measured absolute merged beams recombination rate coefficient for collision energies from 0 to 4.5 eV. We have also developed a new method for deriving the cross section from the measurements. Our approach does not suffer from approximations made by previously used methods. The cross section was transformed to a plasma rate coefficient for the electron temperature range from T = 10 to 5000 K. We show that the previously used HCl+ DR data underestimate the plasma rate coefficient by a factor of 1.5 at T = 10 K and overestimate it by a factor of three at T = 300 K. We also find that the new data may partly explain existing discrepancies between observed abundances of chlorine-bearing molecules and their astrochemical models.