Data Production

and Evaluation at CRAAMD

Jun Yan

Institute of Applied Physics and

Computational Mathematics, Beijing 100088, China

yan_jun@iapcm.ac.cn

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