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          Institute: MPI für Kernphysik     Collection: Physics of Cold Molecular Ions and Ultra-Cold Ensembles     Display Documents

ID: 51121.0, MPI für Kernphysik / Physics of Cold Molecular Ions and Ultra-Cold Ensembles
Absolute high-resolution rate coefficients for dissociative recombination of electrons with HD+: Comparison of results from three heavy-ion storage rings
Authors:Al-Khalili, A.; Rosén, S.; Danared, H.; Derkatch, A. M.; Källberg, A.; Larsson, M.; Le Padellec, A.; Neau, A.; Semaniak, J.; Thomas, R.; af Ugglas, M.; Vikor, L.; Zong, W.; van der Zande, W. J.; Urbain, X.; Jensen, M. J.; Bilodeau, R. C.; Heber, O.; Pedersen, H. B.; Safvan, C. P.; Andersen, L. H.; Lange, M.; Levin, J.; Gwinner, G.; Knoll, L.; Scheffel, M.; Schwalm, D.; Wester, R.; Zajfman, D.; Wolf, A.
Date of Publication (YYYY-MM-DD):2003
Title of Journal:Physical Review A
Journal Abbrev.:Phys. Rev. A
Sequence Number of Article:042702
Copyright:©2003 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Experimental data are presented from three different heavy-ion storage rings (ASTRID in Aarhus, CRYRING in Stockholm, and TSR in Heidelberg) to assess the reliability of this experimental tool for the extraction of absolute rate coefficients and cross sections for dissociative recombination (DR). The DR reaction between HD+ and electrons has been studied between 0 and 30 eV on a dense energy grid. HD+ displays two characteristic local maxima in the DR rate around 9 and 16 eV. These maxima influence the data analysis at smaller collision energies. We conclude that resonant structures in the DR cross sections are reproduced among the experiments within the collision energy resolution. The absolute cross sections agree within the systematic experimental errors of 20% related to the measurement of the ion currents. Absolute thermal rate coefficients for HD+ ions are given for an electron temperature range of 50-300 K. Results for the DR cross section and the thermal rate coefficients are compared to recent theoretical calculations including rotational effects, finding satisfactory agreement.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group D. Schwalm/Atomic and Molecular Physics with Stored Ions (A. Wolf)
External Affiliations:Department of Physics, Stockholm University, SCFAB, S-106 91 Stockholm, Sweden
Institute of Physics, Swietokzryska Academy, 25 406 Kielce, Poland
Manne Siegbahn Laboratory, Stockholm University, S-104 05 Stockholm, Sweden
LCAR UMR 5589, Université Paul Sabatier-Toulouse III, 118 route de Narbonne, Batîment III R1B4, 31062 Toulouse Cedex 4, France
FOM-Institute AMOLF, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
Department of Physics and Astronomy, University of Aarhus, DK-8000 Århus C, Denmark
7Department of Particle Physics, Weizmann Institute of Science, 76100 Rehovot, Israel
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