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23 April 2024 |
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Dissociative recombination measurements of HCl+ using an ion storage ring | | O. Novotný
; A. Becker
; H. Buhr
; C. Domesle
; W. Geppert
; M. Grieser
; C. Krantz
; H. Kreckel
; R. Repnow
; D. Schwalm
; K. Spruck
; J. Stützel
; B. Yang
; A. Wolf
; D. W. Savin
; | | Date: |
11 Jul 2013 | | Abstract: | We have measured dissociative recombination of HCl+ with electrons using a
merged beams configuration at the heavy-ion storage ring TSR 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 3.0 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. | | Source: | arXiv, 1307.2995 | | Services: | Forum | Review | PDF | Favorites | |
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