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  Dissociative Recombination Measurements of HCl+ Using an Ion Storage Ring

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.

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Novotný, O.1, Autor
Becker, Arno2, Autor           
Buhr , H.1, Autor
Domesle, C.2, Autor           
Geppert, W.3, Autor
Grieser, M.2, Autor           
Krantz, C.2, Autor           
Kreckel, H.2, Autor           
Repnow, R.2, Autor           
Schwalm, D2, 4, Autor           
Spruck, Kaija2, Autor           
Stützel, J1, 2, Autor           
Yang , B.1, 5, Autor
Wolf, A.2, Autor           
Savin, D. W.1, Autor
Affiliations:
1 Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USA , ou_persistent22              
2Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society, ou_904548              
3Department of Physics, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden , ou_persistent22              
4 Institut für Atom- und Molekülphysik, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany , ou_persistent22              
5 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China , ou_persistent22              

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 Zusammenfassung: 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.

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 Datum: 2013-10-17
 Publikationsstatus: Online veröffentlicht
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 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1088/0004-637X/777/1/54
 Art des Abschluß: -

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Titel: The Astrophysical Journal
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Chicago, IL : University of Chicago Press for the American Astronomical Society
Seiten: - Band / Heft: 777 (1) Artikelnummer: 54 Start- / Endseite: - Identifikator: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_3