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Contents
- 1. Introduction
- 2. DR Cross Section & Rate coefficient
- 3. Results & Discussion
- 4. Summary & Outlook
Nuclear Data Center Atomic & Molecular Lab.
Dielectronic Recombination of W 45+ and W 44+ : Configuration Mixing - - PowerPoint PPT Presentation
Dielectronic Recombination of W 45+ and W 44+ : Configuration Mixing - - PowerPoint PPT Presentation
IAEA & KAERI Joint CM Dielectronic Recombination of W 45+ and W 44+ : Configuration Mixing and Channels Duck-Hee Kwon and Wonwook Lee Nuclear Data Center Korea Atomic Energy Research Institute KAERI, Korea 14-16 Sept. 2015 Contents 1.
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Introduction
Nuclear Data Center Atomic & Molecular Lab.
DR cross sections and rate coefficients have been calculated for W45+ and W44+ based on an IPIR-DW approximation using flexible atom code (fac). Effects
- f
configuration mixing (CM) involving double electron core excitation and non-resonant stabilizations + decay to autoionizing levels possibly followed by cascades (DAC) on DR are investigated.
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Introduction
Nuclear Data Center Atomic & Molecular Lab.
1 2 3 4 5 6 W W2+ W4+ W6+ W8+ W10+ W12+ W14+ W16+ W18+ W20+ W22+ W24+ W26+ W28+ W30+ W32+ W34+ W36+ W38+ W40+ W42+ W44+ W46+ W48+ W50+ W52+ W54+ W56+ W58+ W60+ W62+ W64+ W66+ W68+ W70+ W72+ W74+
Dielectronic recombination
Experimental data is available
- nly for these ions.
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Introduction
Nuclear Data Center Atomic & Molecular Lab.
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DR cross section and rate coefficient
Nuclear Data Center Atomic & Molecular Lab.
. h A A A e
* ) q ( f * * ) q ( j q i
1 1
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Calculated energies for W45+ and W44+
Nuclear Data Center Atomic & Molecular Lab. Excellent agreement with the recommanded NIST data (0.001 ~ 0.5 %)
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Nuclear Data Center Atomic & Molecular Lab.
W45+ : 3d+e- → 4l4l’ (CM & NRS+DAC)
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Nuclear Data Center Atomic & Molecular Lab.
W45+ : 3d+e- → 4l4l’ (CM & NRS+DAC)
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Nuclear Data Center Atomic & Molecular Lab.
W45+ : 3p+e- → 4l4l’ (CM & NRS+DAC)
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Nuclear Data Center Atomic & Molecular Lab.
W45+ : 3p+e- → 4l4l’ (CM & NRS+DAC)
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Nuclear Data Center Atomic & Molecular Lab.
W45+ : 3d → 4l core excitation rate coeff.
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Nuclear Data Center Atomic & Molecular Lab.
W45+ : 3p → 4l core excitation rate coeff.
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Nuclear Data Center Atomic & Molecular Lab.
W45+ : 4s → 4l core excitation
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Nuclear Data Center Atomic & Molecular Lab.
W45+ : 4s → 5l core excitation
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Nuclear Data Center Atomic & Molecular Lab.
W45+ : Total Rate Coefficient
Submitted.
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Nuclear Data Center Atomic & Molecular Lab.
W45+ : Total Rate Coefficient
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Resonance profile (dense states)
Nuclear Data Center Atomic & Molecular Lab. j → sp =10 eV
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W45+:Resonance profile (dense states)
Nuclear Data Center Atomic & Molecular Lab.
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Nuclear Data Center Atomic & Molecular Lab.
W44+ : 4s → 4l core excitation
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DR computation challenges
Nuclear Data Center Atomic & Molecular Lab.
Long running time for branching ratio calculation due to so many resonance levels
- r NRS+DAC consideration as more CM is
considered
- r
ion stage with complex configuration structure is treated. Parallel algorithms are needed for the AI or RD transition rate calculation.
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Summary & Outlook
Our calculated energies for W45+ and W44+ are in excellent agreement with the recommended NIST data. (0.001 ~ 0.5 %) CM affects
- n
DR rate coefficient significantly specially at low energies near threshold due to appearance
- f
new resonances or resonance energy shift. Accurate DR rate coefficient
- f
W45+ counting all contributable resonances was provided. Density effect , GCR and state resolved DR are our future works.
Nuclear Data Center Atomic & Molecular Lab.