Physics International

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

Manoj Kumar Singh, Arun Kumar Soma, Ramji Pathak and Venktesh Singh

DOI : 10.3844/pisp.2010.95.101

Physics International

Volume 1, Issue 2

Pages 95-101


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.


© 2010 Manoj Kumar Singh, Arun Kumar Soma, Ramji Pathak and Venktesh Singh. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.