Data Production
and Evaluation at CRAAMD
Jun Yan
Institute of Applied Physics and
Computational Mathematics, Beijing 100088, China
IAEA CM, Feb. 7-9, NIFS, Japan
CRAAMD: Founded in 1987
China Research Association of Atomic and Molecular Data
Objective: Data production & evaluation; Promoting the AMP in China
Association of Physicists and their Groups:
1. Yan Jun(颜君), IAPCM
2. Ma Xin-Wen(马新文), Institute of Modern Physic, CAS
3. Qu Yi-Zhi(屈一至), Graduate School of CAS
4. Dong Chen-Zhong(董晨钟), Northwest Normal University
5. Chen Chong-Yang(陈重阳), Fudan University
6. An Zhu(安竹), Sichuan University
7. Ding Da-Jun(丁大军), Jilin University
8. Shan Xu(单旭), Science and Technology University of China
9. Zhu Lin-Fan(朱林繁), Science and Technology University of China
10. Yuan Jian-Min(袁建民), National University of Defense technology
11. Mo Yu-Xiang(莫宇翔), Tsinghua University
12. Liang Gui-Yun(梁贵云), National Astronomical Observatories, CAS
CRAAMD Database
Http://www.camdb.ac.cn/e/ Http://www.camdb.ac.cn/nsdc/
j j
jjiijii NRRN
dt
dNRate equation
Collisional-
Radiative model
Systemic atomic data include: energy level,
cross section and rate coefficient of:
photo-excitation
photo-ionization
electron impact excitation
electron impact ionization
autoionization
and their inverse
processes
Motivation
Collisional Data: Practical importance in many fields
S.D. Loch, et. al. PRE69,
066405(2004)
Collisional Data Evaluation
Collisional Data Evaluation
S.D. Loch, et. al. PRE69,
066405(2004)
Collisional Data Evaluation
Bad?
Good?
Evaluation can answer
How good? which are
Necessary and Important
but are difficulty in general
勿以善小而不为
Recent CRAAMD activities
On Collisional Data collection, production & evaluation
Dr. Zhu Lin-Fan’s group
Inert atoms (He, Ne, Ar, Kr and Xe ): elastic and inelastic
scattering differential cross section, Generalized oscillator
strength, (as well as some photo-absorption cross section)
Dr. Chen Chong-yang’s group
Cu and Gd ions (from H- to Ca-like): electron impact
excitation cross section and rate coefficient including
resonance excitations, (as well as energy levels and
radiative transition rates).
Recent CRAAMD activities
On Collisional Data collection, production & evaluation
Dr. Liang Gui-Yun
Data for electron impact excitation (collision strength,
cross section and rate coefficient):
He-like ions (C3+-Kr34+); Li-like ions (Be+-Kr33+);
F-like ions (Ne+-Kr27+); Ne-like ions (Na+-Kr26+);
Na-like ions (Mg+-Kr25+);
Si9+, Fe13+, S8+-S10+;
Recent CRAAMD activities
On Collisional Data collection, production & evaluation
Dr. Yan Jun’s group
Heavy particle collision
Stopping power
electron collision broadening
Electron impact excitation and ionization with Au ions
Heavy Particle Collision
• AOCC, QMOCC: Excitation, Ionization,
Charge transfer, in debye plasma
– H++Li(2p0, ±1)→H(nl)+Li+
– Be2, 3++H →Be1, 2+(nl)+H+
– B3, 4++H →B2, 3+(nl)+H+
– N5++He→N4+(nl)+He+
– O6++He→O5+(nl)+He+
– H++He(1s2s 1,3S)→H(nl)+He+
– N5++H→N4+(nl)+H+
– O6++H→O5+(nl)+H+
,
Phys. Rev. A 84, 032710 (2011)
Cross sections for electron capture to 2l states of H
from Li(2pσ) and Li(2pπ±) initial states.
Charge transfer data for N5+-H, O6+-H
J. Phys. B 45, 015202 (2012)
Electron impact ionization with Au ions
103
104
105
10-15
10-14
10-13
10-12
10-11
rate
co
eff
icie
nt
(cm
3/s
)
T (eV)
4p is ionized
FAC
AA
1s22s
22p
63s
23p
63d
104p
Li
103
104
105
1E-13
1E-12
1E-11
rate
coeff
icie
nt(
cm
3/s
)
T(eV)
4s is ionized
AA
FAC
1s22s
22p
63s
23p
63d
104s
24p
64d
10
Electron impact ionization with Au ions
103
104
105
1E-16
1E-15
1E-14
1E-13
1E-12
1E-11
rate
co
eff
icie
nt
(cm
3/s
)
T (eV)
3p is ionized
FAC
AA
1s22s
22p
63s
23p
63d
104s
24p
64d
10
103
104
105
1E-17
1E-16
1E-15
1E-14
1E-13
1E-12
rate
coeff
icie
nt
(cm
3/s
)
T(eV)
2s is ionized
AA
FAC
1s22s
22p
63s
23p
63d
104s
24p
64d
10
Electron impact excitation with Au ions
102
103
104
0.01
0.1
1
10
100
T (eV)
FAC
AA
rate
coeff
icie
nt
(10
-10cm
3/s
)
Li
Fang
102
103
104
10-3
10-2
10-1
100
101
Li
T (eV)
rate
co
eff
icie
nt
(10
-13cm
3/s
)
AA
FAC
Au50+ 4s-4p Au50+ 4p-6s
Electron impact excitation with Au ions
102
103
104
105
106
1E-16
1E-15
1E-14
1E-13
1E-12
FAC
AA
rate
co
eff
icie
nt
(cm
3/s
)
T (eV)
3d-5p
Li
Au51+ 3d-5p
102
103
104
0.1
1
10
100
rate
coeff
icie
nt
(10
-12cm
3/s
)
T (eV)
AA
Li
FAC
FangAu50+ 4s-5p
Difficulties of collisional data evaluation
AM data evaluations:
Structures Dynamical processes
Difficulties come from:
non-scientific aspects
scientific aspects:
Large-scale data (most are from calculation)
Many processes (direct, resonances)
Wide energy range
Many methods (experimental & theoretical)
Large discrepancy may exist
Few bench-mark data relatively
Not well-understood physics
Model dependant data
……
Precise calculation of Na GOS(D)
The GOS’s for the
3s-3p transition
X.Y. Han et al., PRA78 052702(2008)
Heavy particle collision
Total (left) and state-selective (right)
rate coefficients in charge transfer of
C3+(1s22s 2S) with He as a function of
temperatur.
Total cross section in charge transfer of
C3+(1s22s 2S) with He.
Y. Wu, et al., PRA80, 022715(2009)
Theory may give more details,
but the agreements with
measurements are often not very good
等离子体屏蔽效应对氢原子结构的影响
Oscillator strength 1s-2p Transition
Wavelength(Ǻ) Our results Ref[1] Ref[2]
1215.03(Coulomb) 0.416197 0.4162 0.4162
1227.88(Debye) 0.401819 0.40175 0.4000
注明: 20 . .D a u
1214.22(多体关联模型) 0.402732 ------- -------
注明: 20 . .D a u 0.02489 0.006803
200eV,9.86747×1021
/cm3 (Ideal plasma)
1358.7(多体关联模型) 0.400462 ------- -------
注明: 20 . .D a u 0.183417 0.136057
10eV,4.93374×1020
/cm3 (Non-ideal plasma)
Ref[1]:PRA 80, 032502 (2009)
Ref[2]:Astron. Astrophys. 396, 337 (2002)
2/
( ) DrZeV r e
r
Debye–Hückel:
长程多体关联势: Phys. plasmas 11,5049(2001)
0 4
2 /( )Be ak T
2 /( )D Be r k T
1/3
3/(4 )a n
Atoms in (non-perturbative) environments
Zeng Si-Liang’s doctoral thesis
0.740 0.742 0.744 0.746 0.748 0.750 0.752 0.7540.0
0.2
0.4
1.0
1.2
Colls
ion S
trength
(a
2 0R
yd)
Incident Energy (Ryd)
No Screening
D=80 D=60
D=48 D=45
D=40 D=34
D=30 D=29
D=28 D=27
D=26 D=25
D=24 D=23
D=22 D=21
D=20
1s-2s excitation(a)
10 100
-0.25
-0.20
-0.15
-0.10
-0.05
0.00
Eig
en E
nerg
ies
(Ryd
)Debye Length (a.u.)
2s
2p
0.70 0.71 0.72 0.73 0.74 0.750.0
0.5
1.0
1.5
2.0
2.5
Co
llsio
n S
tre
ng
th (
a2 0R
yd)
Incident Energy (Ryd)
D=19 D=18 D=17 D=16 D=15 D=14 D=13 D=12 D=11 D=10 D=9 D=8
1s-2s excitation(b)
0.735 0.740 0.745 0.750
0.2
0.3
0.4
Electron impact excitation in Debye plasma
S. B. Zhang et al., Phys. Rev. Lett. 104, 023303 (2010)
Charge exchange spectra
L.Liu et al., Phys. Rev. A 79, 052702(2009)
O8+ + H → O7+(nl) + H+
O7+(nl) → O7+(n’l’) + hv
Data evaluation collaboration
勿以善小而不为
Organization:
Range: what to be evaluated?
together with production ?!
Methods: Standard procedure?
Benchmark problem?
Domestic & International (IAEA)
(Benchmark measurements)
Share experience and results
Funding problem?
Thank you
谢 谢