-
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
[email protected]
September 14, 2015
-
Introduction Main work Future work
Contents
1 Introduction
2 Main workRh-like WPd-like WAg-like W
3 Future work
-
Introduction Main work Future work
DR Process
-
Introduction Main work Future work
DR Process
-
Introduction Main work Future work
Important stages
-
Introduction Main work Future work
1. DR of Rh-like W
-
Introduction Main work Future work
Published work
-
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.
-
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.
-
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.
-
Introduction Main work Future work
n dependence
Figure: The DR rate coefficients where an incident electron is
capturedto the different orbitals of W.
-
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.
-
Introduction Main work Future work
Recombination process
-
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.
-
Introduction Main work Future work
2. DR of Pd-like W†Bowen Li et al. in preparing
-
Introduction Main work Future work
Earlier work
-
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.
-
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.
-
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.
-
Introduction Main work Future work
3. DR of Ag-like W†Bowen Li et al. in preparing, without
extrapolation
-
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
)
-
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
)
-
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
-
Introduction Main work Future work
DR rate
-
Introduction Main work Future work
Future work
Check the Pd-like W data.
Finish the calculations on Ag-like W.
...
-
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.
-
Introduction Main work Future work
Thank you for your attention!
IntroductionMain workRh-like WPd-like WAg-like W
Future work
