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          Institute: MPI für Kernphysik     Collection: Precision Spectroscopy and Ultracold Ensembles     Display Documents

ID: 498908.0, MPI für Kernphysik / Precision Spectroscopy and Ultracold Ensembles
Photoionization of N3+ and Ar8+ in an electron beam ion trap by synchrotron radiation
Authors:Simon, M. C.; Schwarz, M.; Epp, S. W.; Beilmann, C.; Schmitt, B. L.; Harman, Z.; Baumann, T. M.; Mokler, P. H.; Bernitt, S.; Ginzel, R.; Higgins, S. G.; Keitel, C. H.; Klawitter, R.; Kubicek, K.; Mäckel, V.; Ullrich, J.; Crespo López-Urrutia, J. R.
Date of Publication (YYYY-MM-DD):2010-03-09
Title of Journal:Journal of Physics B: Atomic, Molecular and Optical Physics
Journal Abbrev.:J. Phys. B: At. Mol. Opt. Phys.
Issue / Number:6
Start Page:1
End Page:11
Sequence Number of Article:065003
Copyright:© 2010 IOP Publishing Ltd
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Photoionization (PI) of multiply and highly charged ions was studied using an electron beam
ion trap and synchrotron radiation at the BESSY II electron storage ring. The versatile new
method introduced here extends the range of ions accessible for PI investigations beyond
current limitations by providing a dense target of ions in arbitrary, i.e. both low and high
charge states. Data on near-threshold PI of N3+ and Ar8+ ions, species of astrophysical and
fundamental interest, show high resolution and accuracy allowing various theoretical models
to be distinguished, and highlight shortcomings of available PI calculations. We compare our
experimental data with our new fully relativistic PI calculations within a multiconfiguration
Dirac–Fock approach and with other advanced calculations and find generally good
agreement; however, detailed examination reveals significant deviations, especially at the
threshold region of Ar8+.
External Publication Status:published
Document Type:Article
Communicated by:vogt
Affiliations:MPI für Kernphysik/Group of J. Ullrich/Electron Beam Ion Trap ( J.R. Crespo Lopez-Urrutia)
MPI für Kernphysik/ Group of C.H. Keitel
External Affiliations:Max Planck Advanced Study Group, Center for Free-Electron Laser Science, Luruper Chaussee 149,
D-22761 Hamburg, Germany
ExtreMe Matter Institute EMMI, Planckstrasse 1, D-64291 Darmstadt, Germany
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