Il Nuovo Cimento (1955-1965)

, Volume 18, Issue 5, pp 982–1002 | Cite as

Analysis of some nuclear interactions of energies (1012÷1014)eV/nucleon

  • P. K. Malhotra
  • Y. Tsuzuki


Five nuclear interactions produced by nuclei with values of chargeZ=1, 2, 6, 7 and 14 and with energies between 1012 and 1014 eV/nucleon are described. The angular distributions and the momentum distributions of the secondary particles produced in these jets have been studied. Assuming transverse momentum to be constant, the momentum spectrum in the C.M. system in the case of each of the three jets with energies between (1013÷1014) eV/nucleon is found to be of the formP−2dP. Twenty nuclear interactions produced by secondary particles arising in two of the jets which involve energies of about 1014 eV/nucleon have also been analyzed. The ratio of the number of secondary interactions produced by neutral to that produced by charged particles is found to be 0.23±0.15. The energies of the particles responsible for 16 of the secondary interactions have been determined. The transverse momentum distribution of the secondary particles, produced in nucleon-nucleus and nucleus-nucleus collisions at ∼1014 eV/nucleon and emitted at small angles (i.e. belonging to the inner cone), is found to be consistent, in the cases studied here, with that observed in nucleon-nucleon collisions at this energy. The observations indicate that nucleon-nucleus and nucleus-nucleus collisions at energies of about (1013÷1014) eV/nucleon are, in general, similar to nucleon-nucleon collisions.


Si descrivono cinque interazioni nucleari prodotte da nuclei con valori di caricaZ=1, 2, 6, 7 e 14 e con energie fra 1012 e 1014 eV/nucleone. Si sono studiate le distribuzioni angolari e le distribuzioni di momento delle particelle secondarie prodotte in questi getti. Supposto che il momento trasversale sia costante, si trova che lo spettro del momento nel sistema del c.m. nel caso di ciascuno dei tre getti aventi energie fra (103÷1014) eV/nucleone è della formaP−2dP. Si sono anche esaminate venti interazioni nucleari prodotte da particelle secondarie che sorgono in due dei getti, che coinvolgono energie di circa 1014 eV/nucleone. Il rapporto fra il numero di interazioni secondarie prodotte da particelle neutre e il numero di quelle prodotte da particelle con carica risulta essere 0.25±0.15. Si sono determinate le energie delle particelle che provocano 16 delle interazioni secondarie. Si è riscontrato che la distribuzione del momento trasversale delle particelle secondarie, prodotte in collisione nucleone-nucleo e nucleo-nucleo di 1014 eV/nucleone ed emesse con piccolo angolo (cioè, appartenenti al cono interno), corrisponde, nei casi qui studiati, a quella osservata in collisioni nucleone-nucleone di pari energia. Le osservazioni indicano che le collisioni nucleone-nucleo e nucleo-nucleo aventi un’energia di circa (1013÷1014)eV/nucleone sono, in generale, simili alle collisioni nucleone-nucleone.


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Copyright information

© Società Italiana di Fisica 1960

Authors and Affiliations

  • P. K. Malhotra
    • 1
  • Y. Tsuzuki
    • 1
  1. 1.Tata Institute of Fundamental ResearchBombay

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