Research Article Open Access

Two Source Emission Behavior of Helium Projectile Fragments in 84Kr Interactions at Around 1 GeV per nucleon

Manoj Kumar Singh1, Arun Kumar Soma2, Ramji Pathak1 and Venktesh Singh2
  • 1 Tilakdhari Postgraduate College, India
  • 2 Banaras Hindu University,, India
Physics International
Volume 1 No. 2, 2010, 95-101

DOI: https://doi.org/10.3844/pisp.2010.95.101

Submitted On: 22 September 2010 Published On: 31 December 2010

How to Cite: Singh, M. K., Soma, A. K., Pathak, R. & Singh, V. (2010). Two Source Emission Behavior of Helium Projectile Fragments in 84Kr Interactions at Around 1 GeV per nucleon. Physics International, 1(2), 95-101. https://doi.org/10.3844/pisp.2010.95.101

Abstract

Problem statement: The emission of helium projectile fragments has been studied in 84Kr interactions with nuclei of the nuclear emulsion detector at relativistic energies below 2 GeV per nucleon. Approach: The angular distribution of helium projectile fragments in terms of transverse momentum could not be explained by a straight and clean-cut collision geometry hypothesis of Participant-Spectator (PS) Model. Results: Therefore, it has been assumed that helium projectile fragments were produced from two separate sources that belong to the projectile spectator region differing drastically in their temperatures. It has also been clearly observed that the emissions of helium projectile fragments were from two different sources. The contribution of helium projectile fragments from contact layer or hot source was few percent of the total emission of helium projectile fragments. Conclusion: Most of the helium projectile fragments were emitted from the cold source.

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Keywords

  • Helium projectile fragment
  • nucleus-nucleus collisions
  • multiplicity and transverse momentum