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Peripheral fragmentation of 7 Li, 7 Be and 8,10,11 B relativistic nuclei in

Peripheral fragmentation of 7 Li, 7 Be and 8,10,11 B relativistic nuclei in nuclear track emulsion P. I. Zarubin (JINR, Dubna) for BECQUEREL Collaboration.

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Peripheral fragmentation of 7 Li, 7 Be and 8,10,11 B relativistic nuclei in

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  1. Peripheral fragmentation of 7Li, 7Be and 8,10,11B relativistic nuclei in nuclear track emulsion P. I. Zarubin (JINR, Dubna) for BECQUEREL Collaboration

  2. Clustering building blocks: more than one nucleon bound, stable & no exited states below particle decay thresholds – deuteron, triton, 4He, and 3He nuclei

  3. Toward stability frontier =1.58 MeV 11N =0.23 MeV 8C =1.4 MeV 7B =0.092 MeV 6Be =1.5 MeV 5Li

  4. Pure 3He Nucleus Clustering in Light Nuclei ? 9C 8B 7Be 6Be

  5. 6Be, 0.092 MeV +12 MeV 9C, 126.5 ms +16 MeV + 10C, 19.2 s 12O, 0.4 MeV 10B +38 MeV +

  6. 11B 11C, 20.38 m + 14O, 70.6 s 14N 17Ne, 109 s 20Mg, 95 ms

  7. 7Be, 53 days 10C, 19.2 s 13O, 8.58 ms 13N, 10 min 13C + + 14N 16Ne, 0.122 MeV 14O, 0.122 MeV +

  8. 10B 9Be 12C 7Li 8B 9C 7Be 3He Emulsion stacks are exposed in «beamcocktails» of 9C&8He,9Be& 7Li, and 8B &7Benuclei produced via primary 12C and 10B fragmentation.

  9. Deuteron-Alpha Clustering in Light Nuclei 14N (99.634%) 10B (19.9%) 6Li (7.5%) 2H (0.015%)

  10. 4.5A GeV/c6Li

  11. About 7% of all inelastic interactions of 7Li nuclei are “white” stars -80 events. 7Li →α+t - 40 events.

  12. Scintillation counter in front of emulsion stack: Amplitude spectrum Strobe&1H 3He 7Be Li

  13. 1.2A GeV 7Be

  14. MeV 1.6 1.2A GeV 7Be 6.9 25.3 21.2 5.6

  15. 1.0A GeV 10B 10B→2He+H 70% of “white”stars. H – deuteron in40% (like6Li). 10В9Bep – 3%

  16. 1.2A GeV 10B 8B

  17. Q B Be Li He H Ntf Nws 1.2A GeV 8B

  18. Protons vsPTin «white» stars8B→7Be+pandPT*in c.m.s7Be+p. <PT>=52 MeV/c <PT>=73 MeV/c

  19. PT (8B) in “white” stars 7Be+p

  20. Azimuthal angle εi n “white” stars 7Be+p

  21. 1.2A GeV 8B

  22. Yields of 11В Fragments A. Vokalova and S. Vokal, J. Vrlakova, M. Karabova Семинар посвященый 90-летию со дня рождения К.Д.Толстова “Исследование процессов фрагментации релятивистских ядер на Нуклотроне методом ядерных фотоэмульсий” Дубна, 4-5 октября 2005г.

  23. Among 116 stars Nh=0 и Ns=0 (Nh=Ng+Nb) AVI MOV

  24. 11C 11B 10B 10C AVI MOV 10B 9Be 9C

  25. http://becquerel.jinr.ru/

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