Кластерные особенности легких ядер в процессах релятивистской фрагментации П.И. Зарубин (ОИЯИ)

1. Кластерные особенности легких ядер в процессах релятивистской фрагментации П.И. Зарубин (ОИЯИ) http://becquerel.lhe.jinr.ru/

2. Hammer tracks in cosmic ray events: 8Be produced in β-delayed decay of stopped 8B and 8Li

4. 12N 11 ms 9C 0.13 s 10C 19 s 11C 20 m 12C 99% 8B 0.8 s 11B 80.2% 10B 19.8% 7Be 53 d 9Be 100% 6Li 7.5% 7Li 92.5%

7. CO2 laser SYNCHROPHASOTRON Internal target Experimental hall 205 NUCLOTRON – 6 GeV/n Experimental hall Experimental hall 1B

10. 8B → 7Be + p <PT*>=52 MeV/c <PT>=73 MeV/c

11. 8B → 7Be + p

13. 10С

14. 7Be/10С/12Nexposure

15. 12N 11 ms 9C 0.13 s 10C 19 s 11C 20 m 12C 99% 8B 0.8 s 11B 80.2% 10B 19.8% 7Be 53 d 9Be 100% 6Li 7.5% 7Li 92.5%

16. Z=6 Z=5 Z=7 Z=4

19. Фазовая диаграмма ядерной материи

20. Соотношение долей кластерных состояний и нуклонов в зависимости от барионной плотности симметричной ядерной материи

22. 1A GeV U 10A GeV Au 160A GeV Pb

25. CONCLUDING REMARKS The presented observations serve as an illustration of prospects of the Nuclotron for nuclear physics and astrophysics researches. The relativistic energy scale does not impede investigations of nuclear interactions down to energy scale relevant for nuclear astrophysics, but on the contrary gives advantages for investigation of multi-particle systems. The results of an exclusive study of the interactions of relativistic 9Be and 8B nuclei lead to the conclusion that the known features of their structure are clearly manifested in very peripheral dissociations. Due to a record space resolution the emulsion technique provides unique entirety in studying of light nuclei, especially, neutron-deficient ones. Providing the 3D observation of narrow dissociation vertices this classical technique gives novel possibilities of moving toward more and more complicated nuclear systems. Therefore this technique deserves upgrade, without changes in its detection basics, with the aim to speed up the microscope scanning for rather rare events of peripheral dissociation. The investigations with light nuclei provide a basis for challenging studies of increasinglycomplicated systems He – H - n produced via multifragmentation of heavier relativistic nuclei in the energy scale relevant for nuclear astrophysics. In this respect, the motivated prospects are associated with a detailed analysis of the already observed fragment jets in the events of EM & Diffractive dissociation of Au nuclei at 10.6A GeV and Pb nuclei at 160A GeV.

27. Q’=(M*-M)/A

28. 3.65A GeV 20Ne 2+2+2+2+2

29. Диссоциация 8В → 2Не + Н c энергией 1.2 A ГэВ в периферическом взаимодействии на ядре эмульсии. На верхней фотографии видна вершина взаимодействия и струя фрагментов в узком угловом конусе. При смещении по направлению струи фрагментов (нижняя фотография) можно различить 2 фрагмента He и фрагмент Н (трек в середине).

30. 8B: Total PT (7Be+p) EMD “white”stars nh≠0

32. 4.5А GeV/c “white” stars 12C→3α≈ 1 % of Inelastic Interactions

35. 1.2A GeV 9Be 3.22A GeV 22Ne 10.7A GeV 197Au

36. 22Ne 3.22A GeV 4100 Inelastic Interactions

37. 12B 20 ms 12Be 23 ms 10Be 1510000 y 11Be 13.8 s 8Li 838 ms 9Li 178 ms 11Li 8.5 ms 0+ 0+ 8He 119 ms 6He 807 ms