dielectronic recombination computations of rh-, pd- and ag ......section conclusions dielectronic...
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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 UniversitySchool of Physics, University College Dublin
libw@lzu.edu.cn
September 14, 2015
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Introduction Main work Future work
Contents
1 Introduction
2 Main workRh-like WPd-like WAg-like W
3 Future work
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Introduction Main work Future work
DR Process
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Introduction Main work Future work
DR Process
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Introduction Main work Future work
Important stages
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Introduction Main work Future work
1. DR of Rh-like W
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Introduction Main work Future work
Published work
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Introduction Main work Future work
Energy level
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 . 21 09876
5432
1
1 0987654
32
(E c-E 0
)/EI 1
1 = 4 d 8 4 f 22 = 4 d 8 4 f 5 l3 = 4 d 8 5 s 5 l4 = 4 d 8 5 p 5 l5 = 4 d 8 4 f 6 l6 = 4 d 8 5 s 6 l7 = 4 d 8 5 d 5 l8 = 4 d 8 4 f 7 l9 = 4 d 8 5 p 6 l1 0 = 4 d 8 5 f 5 l
G d W
Figure: Energy levels of doubly excited configurations within the 4dcomplexes relative to the first ionization limit EI (565 eV for Gd and1128 eV for W) which is indicated by the dashed line. E0 is the goundstates energy of Pd-like Gd and W.
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Introduction Main work Future work
Energy level
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 . 4W1 098
7
61
543
1
2
1
1 098
7
6
5432
(E c-E 0
)/EI
1 = 4 p 5 4 d 1 0 4 f2 = 4 p 5 4 d 1 0 5 l3 = 4 p 5 4 d 1 0 6 l4 = 4 p 5 4 d 1 0 7 l5 = 4 p 5 4 d 1 0 8 l
6 = 4 p 5 4 d 9 4 f 27 = 4 p 5 4 d 9 4 f 1 5 l8 = 4 p 5 4 d 9 4 f 1 6 l9 = 4 p 5 4 d 9 5 s 21 0 = 4 p 5 4 d 9 5 p 2
1
G d
Figure: Energy levels of doubly excited configurations within the 4pcomplexes relative to the first ionization limit EI (565 eV for Gd and1128 eV for W) which is indicated by the dashed line. E0 is the goundstates energy of Pd-like Gd and W.
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Introduction Main work Future work
4d and 4p complex
1 10 100 100010000
10-13
10-12
10-11
10-10
10-9
1 10 100 100010000
10-14
10-13
10-12
10-11
10-10
4
3
2
Rat
e co
effic
ient
s (c
m3 s
-1)
Te (eV)
1
1 = sum(4d)2 = 4d84fn'l'
3 = 4d85ln'l'
4 = 4d86ln'l'
2
5
4
3
Te (eV)
1 = sum(4p)2 = 4p54d94fn'l'
3 = 4p54d10n'l'
4 = 4p54d95ln'l'
5 = 4p54d96ln'l'
1
Figure: Partial DR rate coefficients for 4d and 4p core excited complexesof W.
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Introduction Main work Future work
n dependence
Figure: The DR rate coefficients where an incident electron is capturedto the different orbitals of W.
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Introduction Main work Future work
DR rate
1 1 0 1 0 0 1 0 0 0 1 0 0 0 0
1 0 - 1 2
1 0 - 1 1
1 0 - 1 0
1 0 - 9Ra
te co
efficie
nts (c
m-3 s-
1 )
6
5
4
3
2
1
5
3
46
1 = T o t a l2 = N R S3 = R S4 = s c a l e5 = s u m ( 4 d )6 = s u m ( 4 p )
T e ( e V )
1
2
Figure: Contributions from the RS and NRS transition as well as differentcore excitations to total DR rate coefficients as a function of Te inRh-like W.
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Introduction Main work Future work
Recombination process
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Introduction Main work Future work
Section conclusions
Dielectronic recombination process is important.
The 4p complexes contribute is aroud 25% to the total DRrate coefficients.
The contributions from NRS transitions are significantlyenhanced for W when compared with Gd as a result oflowering of energy levles relative to the ionization limit.
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Introduction Main work Future work
2. DR of Pd-like W†Bowen Li et al. in preparing
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Introduction Main work Future work
Earlier work
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Introduction Main work Future work
4d and 4p complex
Figure: Contributions from the RS and NRS transition as well as differentcore excitations to total DR rate coefficients as a function of Te inPd-like W.
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Introduction Main work Future work
DR rate
Figure: Contributions from the RS and NRS transition as well as differentcore excitations to total DR rate coefficients as a function of Te inPd-like W.
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Introduction Main work Future work
Section conclusions
Very big discrepancy with Safronova et al..
Need new experiment or other calculations.
∆n = 0 and ∆n = 1 are important.
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Introduction Main work Future work
3. DR of Ag-like W†Bowen Li et al. in preparing, without extrapolation
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Introduction Main work Future work
Energy level
s p d f g h s p d f g h200
300
400
500
600
700
800
900
Configurations
Rel
ativ
e en
ergy
(eV
)
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Introduction Main work Future work
Energy level
s p d f g h s p d f g h s p d f g h s p d f g h200
300
400
500
600
700
800
900
Configurations
Rel
ativ
e en
ergy
(eV
)
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Introduction Main work Future work
Complex
0 . 1 1 1 0 1 0 0 1 0 0 0 1 0 0 0 01 0- 1 3
1 0 - 1 2
1 0 - 1 1
1 0 - 1 0
1 0 - 9
1 0 - 8
Ra
te co
efficie
nts (c
m-3 s-
1 )
T e ( e V )
T o t a l 4 f - c o m p l e x 4 d - c o m p l e x 4 p - c o m p l e x
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Introduction Main work Future work
DR rate
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Introduction Main work Future work
Future work
Check the Pd-like W data.
Finish the calculations on Ag-like W.
...
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Introduction Main work Future work
Acknowledgement
NWNU: Prof. Chenzhong Dong, as well as other members
UCD: Prof. Gerry O’Sullivan
I would like to acknowledge support from the Fundamental ResearchFunds for the Central Universities Grant No. lzujbky-2014-9,International scientific collaboration program by Gansu ProvincialScience and Technology Department Grant No. 144WCGA163 andNational Natural Science Foundation of China Grant No. 11404152as well as financial support from a UCD-CSC scholarship award.
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Introduction Main work Future work
Thank you for your attention!
IntroductionMain workRh-like WPd-like WAg-like W
Future work
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