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Contributions of dielectronic, trielectronic, and metastable channels to the resonant intershell recombination of highly charged silicon ions

MPS-Authors
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Baumann,  Thomas M.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;
2National Superconducting Cyclotron Laboratory, Michigan State University, 640 South Shaw Lane, East Lansing, Michigan 48824, USA;

/persons/resource/persons30565

Harman,  Zoltán
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;
ExtreMe Matter Institute EMMI, Planckstrasse 1, 64291 Darmstadt, Germany;

/persons/resource/persons104481

Stark,  Julian
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30291

Beilmann,  Christian
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30816

Mokler,  Paul
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30383

Crespo López-Urrutia,  José R.
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

External Resource

http://journals.aps.org/pra/abstract/10.1103/PhysRevA.90.052704
(Publisher version)

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Citation

Baumann, T. M., Harman, Z., Stark, J., Beilmann, C., Liang, G., Mokler, P., et al. (2014). Contributions of dielectronic, trielectronic, and metastable channels to the resonant intershell recombination of highly charged silicon ions. Physical Review A, 90(5): 052704. doi:10.1103/PhysRevA.90.052704.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-422B-4
Abstract
Intershell, resonant electronic recombination is studied experimentally in an electron-beam ion trap for O-like Si6+ to He-like Si12+ ions at plasma temperatures in the megakelvin range similar to those found in the solar radiative zone and is compared to extended multiconfiguration Dirac-Fock and relativistic configuration-interaction predictions. For this low-Z ion, the higher-order electronic recombination processes are comparable in strength to the first-order one. The ratio of trielectronic to dielectric recombination for B-like species agrees well with predictions, whereas for C-like ions the measured value is only half as large. This difference is explained by the influence of metastable states populated in the recombining plasma.