Fast helium production in interactions of 3.7 A GeV 24Mg with emulsion nuclei



We have studied the properties of the relativistic helium fragments emitted from the projectile in the interactions of 24Mg ions accelerated at an energy of 3.7 A GeV with emulsion nuclei. The total, partial nuclear cross-sections and production rates of helium fragmentation channels in relativistic nucleus-nucleus collisions and their dependence on the mass and energy of the incident projectile nucleus are investigated. The yields of multiple helium projectile fragments disrupted from the interactions of 24Mg projectile nuclei with hydrogen H, light CNO and heavy AgBr groups of target emulsion nuclei are discussed and they indicate that the breakup mechanism of the projectile seems to be independent of the target mass. Limiting fragmentation behavior of fast-moving helium fragments is observed in both the projectile and target nuclei. The multiplicity distributions of helium projectile fragments emitted in the interactions of 24Mg projectile nuclei with the different target nuclei of the emulsion are well described by the KNO scaling presentation. The mean multiplicities of the different charged secondary particles, normally defined shower, grey and black ( 〈ns〉, 〈ng〉 and 〈nb〉) emitted in the interactions of 3.7 A GeV 24Mg with the different groups of emulsion nuclei at different ranges of projectile fragments are decreasing when the number of He fragments stripped from projectile increases. These values of 〈ni〉 ( i = s, g, b and h particles) in the events where the emission of fast helium fragments were accompanied by heavy fragments having Z ⩾ 3 seem to be constant as the He multiplicity increases, and exhibit a behavior independent of the He multiplicity.


29.40.Rg Nuclear emulsions 25.75.-q Relativistic heavy-ion collisions 25.70.Mn Projectile and target fragmentation 25.70.Pq Multifragment emission and correlations 


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  1. 1.
    P.L. Jain, G. Singh, A. Mukhopadhyay, Phys. Rev. C 50, 1085 (1994).CrossRefGoogle Scholar
  2. 2.
    G. Singh, P.L. Jain, Phys. Rev. C 54, 3185 (1996) and references therein.CrossRefGoogle Scholar
  3. 3.
    M.A. Jilany, Phys. Rev. C 70, 014901 (2004).CrossRefGoogle Scholar
  4. 4.
    K.A. Chikin, V.L. Korotkih, A.P. Kryukov, L.I. Sarycheva, I.A. Pshenichnov, J.P. Bondorf, I.N. Mishustin, Eur. Phys. J. A 8, 537 (2000).CrossRefGoogle Scholar
  5. 5.
    J. Hüfner, Phys. Rep. 125, 129 (1985).CrossRefGoogle Scholar
  6. 6.
    D.H.E. Gross, Rep. Prog. Phys. 53, 605 (1990) and references therein.CrossRefGoogle Scholar
  7. 7.
    J. Bondorf, Phys. Rep. 257, 133 (1995)CrossRefGoogle Scholar
  8. 8.
    M.I. Adamovich, Eur. Phys. J. A 5, 429 (1999) and references therein.Google Scholar
  9. 9.
    Y.D. Kim, Phys. Rev. Lett. 63, 494 (1989).CrossRefGoogle Scholar
  10. 10.
    C.A. Ogivie, Phys. Rev. Lett. 67, 1214 (1991).CrossRefGoogle Scholar
  11. 11.
    M.L. Cherry, Eur. Phys. J. C 5, 641 (1998).CrossRefGoogle Scholar
  12. 12.
    M.L. Cherry, Phys. Rev. C 52, 2652 (1995).CrossRefGoogle Scholar
  13. 13.
    D.G. d’Enterria, Phys. Rev. C 52, 3179 (1995).CrossRefGoogle Scholar
  14. 14.
    W. Trautmann, Preprint nucl-ex/9611002.Google Scholar
  15. 15.
    J. Lee, A.Z. Mekjian, Nucl. Phys. A 730, 514 (2004) and references therein.CrossRefGoogle Scholar
  16. 16.
    G.F. Bertsch, S. Das Gupta, Phys. Rep. 160, 189 (1988).CrossRefGoogle Scholar
  17. 17.
    G. Peilert, Phys. Rev. C 39, 1402 (1989)CrossRefGoogle Scholar
  18. 18.
    A. Aranda, C.O. Dorso, V. Furci, J.A. Lopez, Phys. Rev. Lett. 52, 3217 (1995).Google Scholar
  19. 19.
    M.I. Adamovich, Nucl. Phys. A 593, 535 (1995) and references therein.CrossRefGoogle Scholar
  20. 20.
    Z. Koba, H.B. Nielsen, P. Olesen, Nucl. Phys. B 40, 317 (1972).CrossRefGoogle Scholar
  21. 21.
    H.E. Stanley, Introduction to Phase Transitions and Critical Phenomena (Clarendon Press, 1971).Google Scholar
  22. 22.
    M.A. Jilany, Nucl. Phys. A 705, 477 (2002) and references therein.CrossRefGoogle Scholar
  23. 23.
    B.K. Singh, S.K. Tuli, Nuovo Cimento A 112, 1093 (1999).Google Scholar
  24. 24.
    M. El-Nadi, M.S. El-Nagdy, N. Ali-Mossa, A. Abdelsalam, A.M. Abdalla, A.A. Hamed, J. Phys. G 25, 1169 (1999).Google Scholar
  25. 25.
    H.L. Bradt, B. Peters, Phys. Rev. 77, 54 (1950).CrossRefGoogle Scholar
  26. 26.
    M. El-Nadi, A. Abdelsalam, M.S. El-Nagdy, E.A. shaat, N. Ali-Mossa, Z. Abou-Moussa, S. Kamel, N. Rashed, M.E. Hafiz, B. Badawy, Proceedings of the 27th International Cosmic Ray Conference, Hamburg, Germany, 7-15 August 2001 (Copernicus Gesellschaft, Katlenburg-Lindau, 2001) p. 1366.Google Scholar
  27. 27.
    M. El-Nadi, A. Abdelsalam, N. Ali-Mossa, Z. Abou-Moussa, Kh. Abdel-Waged, W. Osman, B. Badawy, Nuovo Cimento A 111, 1243 (1998).Google Scholar
  28. 28.
    M. Nabil. Yasin, M.M. Sherif, S.M. Abd El-Halim, M.A. Jilany, Sov. Phys JETP 84, 635 (1997).CrossRefGoogle Scholar
  29. 29.
    M.I. Adamovich, Sov. J. Nucl. Phys. 29, 52 (1979).Google Scholar
  30. 30.
    M.I. Adamovich, Phys. Rev. Lett. 62, 2801 (1989).CrossRefGoogle Scholar
  31. 31.
    Alma-Ata-Bucharest-Gatchina-Dubna-Dushanbe-Erevan- Kosice-Krakow-Leningrad-Moscow-Rzezz-Tashkent- Tbilisi-Ulaan-Bator Collaboration, Sov. J. Nucl. Phys. 45, 78 (1987).Google Scholar
  32. 32.
    M.I. Adamovich, Z. Phys. A 351, 311 (1995)Google Scholar
  33. 33.
    S.Y.Bahk, Phys. Rev. C 43, 1410 (1991).CrossRefGoogle Scholar
  34. 34.
    A. Abdelsalam, E.A. Shaat, N. Ali-Mossa, Z. Abou-Moussa, O.M. Osman, N. Rashed, W. Osman, B.M. Badawy, E. El-Falaky, J. Phys. G 28, 1375 (2002).Google Scholar
  35. 35.
    G. Baroni, Nucl. Phys. A 516, 673 (1990).CrossRefGoogle Scholar
  36. 36.
    M. El-Nadi, M.S. El-Nagdy, N. Ali-Mossa, A. Abdelsalam, A.M. Abdalla, S.M. Abdel-Halim, J. Phys. G 28, 1251 (2002).Google Scholar
  37. 37.
    G. Singh, A.Z.M. Ismail, P.L. Jain, Phys. Rev. C 43 , 2417 (1991)CrossRefGoogle Scholar
  38. 38.
    S. Kamel, Nuovo Cimento A 112, 733 (1999).Google Scholar
  39. 39.
    Fu-Hu Liu, Y.A. Panebratsev, Nuovo Cimento A 111, 1219 (1998)Google Scholar
  40. 40.
    M. El-Nadi, M.M. Sherif, A. Abd El-salam, M.N. Yasin, A. Bakr, M.S. El-Nagdy, M.A. Jilany, Int. J. Mod. Phys. E 2, 381 (1993). CrossRefGoogle Scholar
  41. 41.
    P.L. Jain, M.M. Aggarwal, Phys. Rev. C 33, 1970 (1986).CrossRefGoogle Scholar
  42. 42.
    L.S. Liu, T.C. Meng, Phys. Rev. D 27, 2640 (1983).CrossRefGoogle Scholar
  43. 43.
    A.H. Muller, Phys. Rev. D 4, 150 (1971).CrossRefGoogle Scholar

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© Società Italiana di Fisica and Springer-Verlag 2004

Authors and Affiliations

  1. 1.South Valley UniversitySohagEgypt

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