Journalartikel

Jahr der Veröffentlichung: 2013

Zeitschrift: The Astrophysical Journal

Bandnummer: 777

Heftnummer: 1

ISSN: 0004-637X

eISSN: 1538-4357

Open Access Status: Green

DOI Link: https://doi.org/10.1088/0004-637X/777/1/54

Verlag: American Astronomical Society

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.

Harvard-Zitierstil: Novotny, 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), Article 54. https://doi.org/10.1088/0004-637X/777/1/54

APA-Zitierstil: Novotny, O., Becker, A., Buhr, H., Domesle, C., Geppert, W., Grieser, M., Krantz, C., Kreckel, H., Repnow, R., Schwalm, D., Spruck, K., Stuetzel, J., Yang, B., Wolf, A., & Savin, D. (2013). DISSOCIATIVE RECOMBINATION MEASUREMENTS OF HCl⁺ USING AN ION STORAGE RING. The Astrophysical Journal. 777(1), Article 54. https://doi.org/10.1088/0004-637X/777/1/54