Dielectronic recombination computations of Rh-, Pd- and Ag-like W - - PowerPoint PPT Presentation
Introduction Main work Future work Dielectronic recombination computations of Rh-, Pd- and Ag-like W with the FAC code Bowen Li School of Nuclear Science and Technology, Lanzhou University School of Physics, University College Dublin
Introduction Main work Future work
Bowen Li
School of Nuclear Science and Technology, Lanzhou University School of Physics, University College Dublin libw@lzu.edu.cn
September 14, 2015
Introduction Main work Future work
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Introduction
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Main work Rh-like W Pd-like W Ag-like W
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Future work
Introduction Main work Future work
Introduction Main work Future work
Introduction Main work Future work
Introduction Main work Future work
Introduction Main work Future work
Introduction Main work Future work
0.0 0.2 0.4 0.6 0.8 1.0 1.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2
10 9 8 7 6 5 4 3 2 1 10 9 8 7 6 5 4 3 2 (Ec-E0)/EI 1 1=4d
84f 2
2=4d
84f5l
3=4d
85s5l
4=4d
85p5l
5=4d
84f6l
6=4d
85s6l
7=4d
85d5l
8=4d
84f7l
9=4d
85p6l
10=4d
85f5l
Gd W
Figure: Energy levels of doubly excited configurations within the 4d complexes relative to the first ionization limit EI (565 eV for Gd and 1128 eV for W) which is indicated by the dashed line. E0 is the gound states energy of Pd-like Gd and W.
Introduction Main work Future work
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
W
10 9 8 7 6 1 5 4 3 1 2 1 10 9 8 7 6 5 4 3 2 (Ec-E0)/EI 1=4p
54d 104f
2=4p
54d 105l
3=4p
54d 106l
4=4p
54d 107l
5=4p
54d 108l
6=4p
54d 94f 2
7=4p
54d 94f 15l
8=4p
54d 94f 16l
9=4p
54d 95s 2
10=4p
54d 95p 2
1
Gd
Figure: Energy levels of doubly excited configurations within the 4p complexes relative to the first ionization limit EI (565 eV for Gd and 1128 eV for W) which is indicated by the dashed line. E0 is the gound states energy of Pd-like Gd and W.
Introduction Main work Future work
Figure: Partial DR rate coefficients for 4d and 4p core excited complexes
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Figure: The DR rate coefficients where an incident electron is captured to the different orbitals of W.
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1 10 100 1000 10000 10
10
10
10
Rate coefficients (cm
6 5 4 3 2 1 5 3 4 6 1 = Total 2 = NRS 3 = RS 4 = scale 5 = sum(4d) 6 = sum(4p)
Te (eV)
1 2
Figure: Contributions from the RS and NRS transition as well as different core excitations to total DR rate coefficients as a function of Te in Rh-like W.
Introduction Main work Future work
Introduction Main work Future work
Dielectronic recombination process is important. The 4p complexes contribute is aroud 25% to the total DR rate coefficients. The contributions from NRS transitions are significantly enhanced for W when compared with Gd as a result of lowering of energy levles relative to the ionization limit.
Introduction Main work Future work
†Bowen Li et al. in preparing
Introduction Main work Future work
Introduction Main work Future work
Figure: Contributions from the RS and NRS transition as well as different core excitations to total DR rate coefficients as a function of Te in Pd-like W.
Introduction Main work Future work
Figure: Contributions from the RS and NRS transition as well as different core excitations to total DR rate coefficients as a function of Te in Pd-like W.
Introduction Main work Future work
Very big discrepancy with Safronova et al.. Need new experiment or other calculations. ∆n = 0 and ∆n = 1 are important.
Introduction Main work Future work
†Bowen Li et al. in preparing, without extrapolation
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s p d f g h s p d f g h 200 300 400 500 600 700 800 900
Configurations Relative energy (eV)
Introduction Main work Future work
s p d f g h s p d f g h s p d f g h s p d f g h 200 300 400 500 600 700 800 900
Configurations Relative energy (eV)
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0.1 1 10 100 1000 10000 10
10
10
10
10
10
Rate coefficients (cm
Te (eV)
Total 4f-complex 4d-complex 4p-complex
Introduction Main work Future work
Introduction Main work Future work
Check the Pd-like W data. Finish the calculations on Ag-like W. ...
Introduction Main work Future work
NWNU: Prof. Chenzhong Dong, as well as other members UCD: Prof. Gerry O’Sullivan I would like to acknowledge support from the Fundamental Research Funds for the Central Universities Grant No. lzujbky-2014-9, International scientific collaboration program by Gansu Provincial Science and Technology Department Grant No. 144WCGA163 and National Natural Science Foundation of China Grant No. 11404152 as well as financial support from a UCD-CSC scholarship award.
Introduction Main work Future work