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New Contributions to A+M Databases for Plasma Modeling R.K. Janev Macedonian Academy of Sciences and Arts, Skopje, Macedonia IAEA RCM on A+M data for plasma.

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Presentation on theme: "New Contributions to A+M Databases for Plasma Modeling R.K. Janev Macedonian Academy of Sciences and Arts, Skopje, Macedonia IAEA RCM on A+M data for plasma."— Presentation transcript:

1 New Contributions to A+M Databases for Plasma Modeling R.K. Janev Macedonian Academy of Sciences and Arts, Skopje, Macedonia IAEA RCM on A+M data for plasma modeling, Nov , 2008

2 Outline: Electron impact processes: - Excitation of A, B, C, electronic states of CH; - Dissociative electron attachment on H 2 (v) in the 14 eV energy region State-selective electron capture in H(1s) – fully stripped ion collisions Electron loss cross sections of Li q+, Be q+, B q+ and C q+ ions colliding with H and H +

3 e-impact excitation of A 2 ∆,B 2 Σ -,C 2 Σ - states of CH: 0-0 transitions (collaboration with R. Celiberto and D. Reiter) Cross sections: ** E ≤ 10 eV: R-Matrix (Baluja, Msezane, J.Phys.B: 34, 3157 (2001)) ** E ≥ 20 eV: Bethe –Born ** 10 eV ≤ E ≤ 20 eV: interpolation

4 Basis for Bethe-Born calculations: Potential energy curves, excitation energies, dipole transition moments: X 2 Π → A 2 ∆ : Larsson, JCP (1983) X 2 Π → B 2 Σ -,C 2 Σ - : Dishoeck, JCP (1986)

5 Potential energy curves

6 Dipole transition moments

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13 v-v’ transitions: scaling σ X,F v,v’ (x) ~ (1/x )(1/∆E X,F v,v’ ) M X,F v,v’ (Born) x = E/∆E X,F v,v’, M X,F v,v’ = | | 2 σ X,F v,v’ =(∆E 0,0’ /∆E v,v’ ) X,F (M v,v’ / M 0,0’ ) X,F σ X,F 0,0’ (x) F = A, B, C

14 Dissociative electron attachment on H 2 (v) near 14 eV (collaboration with R. Celiberto, J. Wadehra and A. Laricchiuta) e + H 2 (X;v) → H 2 − ( 2 Σ g + ) → H − (1s 2 ) + H(2s) ** Feshbach resonance with a, c triplets and C, EF singlets as parent states; ** E r (R)and Γ(R) determined by Stibbe, Tennyson (J.Phys.B, 1998) for R ≤ 4a 0

15 Method: Resonace theory with local complex potential; Exrapolation of S&T data for R ≥ 4a 0 ; RVE calculations with this extrapolation gave good agreement with Gomer and Read exp. data

16 Potential energy curves

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20 V=5

21 V=10

22 State-selective electron capture in H(1s) - A Z+ and He 2+ -He + collisions (collaboration with J.G. Wang and L. Liu, Beijing) A Z+ = H +, He 2+, C 6+, O 8+ He + = He + (1s), He + (2s) Method: AOCC with extremely large expansion basis (the largest to date)

23 Atomic-orbital close-coupling method

24 Cross sections for excitation, capture and ionization Initial conditions Close-coupling equations

25 Used AO basis sets H + + H: 10P/156H (excitation) (icludes 99ps) 156P/10 H (charge exchange) He 2+ + H: 20P/156H (exc); 156P/20 (CX) C 6+ + H: 120P/4H (CX) (before: 35P/1H) O 8+ + H: 84P/4H (CX) (before: 45P/1H)

26 Part Ⅰ : H + +H(1s) collision system Electron capture to 1s, 2s and 2p states of H

27 Energy behavior of 2s excitation cross section.

28 Energy behavior of 2p excitation cross section

29 Energy behavior of 3s excitation cross section

30 Energy behavior of 3p excitation cross section

31 Energy behavior of 3d excitation cross section

32 Part Ⅱ : He 2+ + H(1s) collision system: Energy dependence of state-selective cross sections for electron capture to 1s, 2l, 3l and 4l states of He +.

33 Partial electron capture cross sections to He + (n), n = 1, 2, 3, 4.

34 Total charge transfer cross section for He 2+ +H (1s) collision

35 Energy behavior of 2p excitation cross section

36 Energy behavior of 3p excitation cross section

37 Part Ⅲ : C 6+ + H(1s) collision system

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42 Partial electron capture cross section to C 5+ (n=5)

43 Partial electron capture cross section to C 5+ (n=4)

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45 Total electron capture cross sections for C 6+ +H (1s) collisions

46 Part Ⅳ : O 8+ +H(1s) collision system Partial electron capture cross sections to O 7+ (n), n=4, 5, 6.

47 Energy dependence of state-selective cross sections for electron capture to 4l states of O 7+

48 State-selective cross sections for electron capture to 5l states of O 7+

49 State-selective cross sections for electron capture to 6l states of O 7+.

50 Total charge transfer cross sections for O 8+ +H (1s) collisions

51 Part Ⅴ : He 2+ + He + (1s), He + (2s) collision systems State-selective cross sections for He 2+ +He + (1s)→ He + (nl) +He 2+.

52 Partial charge transfer cross sections for He 2+ +He + (1s)→ He + (n) +He 2+, n=1, 2, 3.

53 Total electron-capture cross section for He 2+ +He + (1s) → He + +He 2+

54 State-selective cross sections for He 2+ +He + (2s)→ He + (nl) +He 2+

55 Partial charge transfer cross sections for He 2+ +He + (2s)→ He + (n) +He 2+, n = 1, 2, 3, 4.

56 Total electron capture cross section for He 2+ +He + (2s)→ He + + He 2+

57 Cross sections for 2l and 3l excitation He 2+ +He + (2s) collisions

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