Data Production and Evaluation at CRAAMD

Transcription

1 Data Production and Evaluation at CRAAMD Jun Yan Institute of Applied Physics and Computational Mathematics, Beijing , China IAEA CM, Feb. 7-9, NIFS, Japan

2 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

3 CRAAMD Database

4 Motivation Collisional Data: Practical importance in many fields Rate equation Collisional- Radiative model dn dt i N i j R ij j R ji N j 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

5 Collisional Data Evaluation S.D. Loch, et. al. PRE69, (2004)

6 Collisional Data Evaluation S.D. Loch, et. al. PRE69, (2004)

7 Collisional Data Evaluation Evaluation can answer which are Bad? Good? How good? Necessary and Important but are difficulty in general 勿以善小而不为

8 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).

9 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 (C 3+ -Kr 34+ ); Li-like ions (Be + -Kr 33+ ); F-like ions (Ne + -Kr 27+ ); Ne-like ions (Na + -Kr 26+ ); Na-like ions (Mg + -Kr 25+ ); Si 9+, Fe 13+, S 8+ -S 10+ ;

10 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

11 Heavy Particle Collision AOCC, QMOCC: Excitation, Ionization, Charge transfer, in debye plasma H + +Li(2p 0, ±1 ) H(nl)+Li + Be 2, 3+ +H Be 1, 2+ (nl)+h + B 3, 4+ +H B 2, 3+ (nl)+h + N 5+ +He N 4+ (nl)+he + O 6+ +He O 5+ (nl)+he + H + +He(1s2s 1,3 S) H(nl)+He + N 5+ +H N 4+ (nl)+h + O 6+ +H O 5+ (nl)+h +

12 Cross sections for electron capture to 2l states of H from Li(2pσ) and Li(2pπ ± ) initial states., Phys. Rev. A 84, (2011)

13 Charge transfer data for N 5+ -H, O 6+ -H J. Phys. B 45, (2012)

14 rate coefficient (cm 3 /s) rate coefficient(cm 3 /s) Electron impact ionization with Au ions p is ionized 4s is ionized s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4p 1E-11 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 4d Li FAC AA 1E-12 AA FAC T (ev) 1E T(eV)

15 rate coefficient (cm 3 /s) rate coefficient (cm 3 /s) Electron impact ionization with Au ions 1E-11 3p is ionized 1E-12 2s is ionized 1E-12 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 4d 10 1E-13 1E-13 1E-14 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 4d 10 1E-14 1E-15 1E-15 FAC AA 1E-16 AA FAC 1E E T (ev) T(eV)

16 rate coefficient (10-10 cm 3 /s) rate coefficient (10-13 cm 3 /s) Electron impact excitation with Au ions AA FAC Li 0.1 Au 50+ 4s-4p AA FAC Li Fang 10-2 Au 50+ 4p-6s T (ev) T (ev)

17 rate coefficient (cm 3 /s) rate coefficient (10-12 cm 3 /s) Electron impact excitation with Au ions 100 1E-12 3d-5p 1E E-14 1E-15 Au 51+ 3d-5p Li FAC AA 1 Au 50+ 4s-5p AA FAC Li Fang 1E T (ev) T (ev)

18 Difficulties of collisional data evaluation AM data evaluations: Structures Difficulties come from: Dynamical processes scientific aspects: Large-scale data (most are from calculation) Not well-understood physics Model dependant data non-scientific aspects Many processes (direct, resonances) Wide energy range Many methods (experimental & theoretical) Large discrepancy may exist Few bench-mark data relatively

19 Precise calculation of Na GOS(D) The GOS s for the 3s-3p transition X.Y. Han et al., PRA (2008)

20 Heavy particle collision Theory may give more details, but the agreements with measurements are often not very good Total cross section in charge transfer of C 3+ (1s 2 2s 2 S) with He. Total (left) and state-selective (right) rate coefficients in charge transfer of C 3+ (1s 2 2s 2 S) with He as a function of temperatur. Y. Wu, et al., PRA80, (2009)

21 Atoms in (non-perturbative) environments 等离子体屏蔽效应对氢原子结构的影响 1s-2p Transition Oscillator strength Wavelength(Ǻ) Our results Ref[1] Ref[2] (Coulomb) (Debye) 注明 : 20 au.. D ( 多体关联模型 ) 注明 : 20 au D 200eV, /cm 3 (Ideal plasma) ( 多体关联模型 ) 注明 : 20 au D 10eV, /cm 3 (Non-ideal plasma) Ref[1]:PRA 80, (2009) Debye Hückel: 2 Ze r / D V () r e r 长程多体关联势 : Phys. plasmas 11,5049(2001) 0 4 a 3/(4 n) 1/3 e 2 /( akbt ) e 2 /( r k T) D B Ref[2]:Astron. Astrophys. 396, 337 (2002) Zeng Si-Liang s doctoral thesis

22 Eigen Energies (Ryd) Collsion Strength ( a 2 0 Ryd) Collsion Strength ( a 2 0 Ryd) Electron impact excitation in Debye plasma (a) 1s-2s excitation 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= (b) 1s-2s excitation D=19 D=18 D=17 D=16 D=15 D=14 D=13 D=12 D=11 D=10 D=9 D= Debye Length (a.u.) 2s 2p Incident Energy (Ryd) Incident Energy (Ryd) S. B. Zhang et al., Phys. Rev. Lett. 104, (2010)

23 Charge exchange spectra O 8+ + H O 7+ (nl) + H + O 7+ (nl) O 7+ (n l ) + hv L.Liu et al., Phys. Rev. A 79, (2009)

24 Data evaluation collaboration 勿以善小而不为 Range: what to be evaluated? together with production?! Methods: Standard procedure? Benchmark problem? Organization: Domestic & International (IAEA) (Benchmark measurements) Share experience and results Funding problem?

25 Thank you 谢谢