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Study of 7Li + 2H Reaction: Angular Distribution and Cross Section of 8Li Production

This study investigates the nuclear reaction 7Li + 2H → 8Li + 1H, focusing on the angular distribution and cross section for 8Li production. Utilizing a 25 MeV laboratory setup, the research explores mechanisms such as compound nucleus formation and neutron pick-up, employing advanced detection techniques to analyze energy spectra and particle identification in emitted fragments. Key findings contribute to understanding reaction dynamics and nuclear structure, highlighting the significance of both entrance and exit channels in nuclear reactions.

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Study of 7Li + 2H Reaction: Angular Distribution and Cross Section of 8Li Production

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  1. Study of the nuclear reaction 7Li + 2H -> 8Li + 1H E. Vardaci Dipartimento di Scienze Fisiche dell’Università di Napoli and INFN G. De Angelis, M. Cinausero, G. Prete Laboratori Nazionali di Legnaro

  2. 7Li + 2H -> 8Li + 1H Elab = 25MeV C. Rubbia et al., NIM A568 (2006) 475

  3. Questions • What is the angular distribution of 8Li • How big is the cross section for the 8Li production

  4. 8Li 7Li Two possible mechanisms Formation and decay of a compound nucleus 7Li + 2H -> 9Be* -> 8Li + 1H Neutron Pick-up 2H 7Li

  5. Two Body Kinematics 3 Entrance channel CN Exit channel 2 1 Q = E3 + E4 – E1 4 E1 + Q = E3 + E4 Qgg = M1 + M2 – M3 – M4 Qfu = M1 + M2 – MCN ELab = T0 + TCM

  6. TRIGGERS Fission Fragments in ring E/F/G CORSET (E. Kozulin group, FLNR) Evaporation Residues (4 PPAC- PPAC) The 8pLP setup MAX ENERGYWall: up to 64 AMeV Ball : up to 34 AMeV ENERGY THRESHOLDS0.5 AMeV for p and a 2-3 AMeV for 12C

  7. Er DE E- DE Technique

  8. Er DE PSD Technique Used for particles that stop in the first stage of the telescope.

  9. 7Li + 2H -> 8Li + 1H

  10. 7Li + 2H -> 8Li + 1H

  11. 7Li + 2H -> 9Be* -> 8Li + 1H E * = To + Qfu 5.364 T0 5555 -190.749 8Li + 1H 7Li + 2H Qgg = -190.749 22250.7 16886.469 16695.72 Elab = 25MeV

  12. Population of 8Li 9Be* 5364 Sn

  13. Hydrogen pollution in the Target

  14. E-DE Particle Identification DET #72 20.6°

  15. E-DE Particle Identification DET #99 22.2°

  16. Protons Energy Spectra DET #72 20.6°

  17. Protons Energy Spectra DET #308 43.2°

  18. 7Li + 2H -> 1H (Energy)

  19. Furthermore • Normalize X-Sections • Energy Checks for the Excited states • Convert to CM frame • Analyze t and a channels

  20. 7Li + 2H -> 1H (Energy)

  21. 7Li + 2H -> 1H (Energy)

  22. 7Li + 2H -> 1H (Energy)

  23. 7Li + 2H -> 1H (Energy)

  24. Pollution 2+ (g.s.) 3+ (2nd) 1+ (3rd) 1+ (1st)

  25. 7Li + 2H -> 1H Lab Angular Distribution for E1 Preliminary

  26. 2H(7Li,p) 8Li CM Angular Distribution for E1 8 MeV 12 MeV

  27. 7Li + 2H -> 1H Lab Angular Distribution for E2

  28. 7Li + 2H -> 1H Lab Angular Distribution for E3

  29. 7Li + 2H -> 1H Lab Angular Distribution for E4

  30. 7Li + 2H -> 8Li + 1H

  31. 7Li (d, p) 8Li 7Li (d, 3He) 6He 7Li (d, t) 6Li More Channels 7Li + 2H

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