Published July 2015 | Version v1
Journal article

Emitted in Relativistic Heavy Ion Collisions with Ag Br Target Nuclei

  • 1. Physics Department, Faculty of Education, Ain Shams University, Cairo (Egypt)
  • 2. Physics Department, Faculty of Science, Fayoum University, Fayoum (Egypt)

Description

In this work, the behavior and properties of medium energy protons with kinetic energy in the range 26-400 MeV is derived from measurements of the particle yields and spectra in the final state of relativistic heavy ion collisions (16O-Ag Br interactions at 60u and 200 A GeV and 32S-Ag Br interactions at 3.7 A and 200 A GeV) and their interpretation in terms of the low order moments. The multiplicity distributions have fitted well with the Gaussian distribution function. The data also are compared with the predictions of the modified FRITIOF model showing that FRITIOF does not reproduce the trend and the magnitude of the data. The measurements of the ratio of variance to mean show that the production of target fragments at high energies cannot be considered a statistically independent process. However, the deviation of each multiplicity distribution from a Poisson is law gives an evidence for correlations. The KNO scaling behavior of two types of scaling (Koba-Nielsen-Olesen (KNO)-scaling and Hegyi scaling) functions in terms of the multiplicity distribution is investigated. A simplified universal function has been used in each scaling to display the experimental data.The examination of the relationship between the entropy, the average multiplicity, and the KNO function is performed. Entropy production and subsequent scaling in nucleus-nucleus collisions is carried out by analyzing the experimental data over a wide energy range (Dubna and SPS). It is interesting to point out that the data points corresponding to various energies overlap and fall on a single curve, indicating the presence of a kind of entropy scaling

Additional details

Publishing Information

Journal Title
Arab Journal of Nuclear Sciences and Applications
Journal Volume
48
Journal Issue
3
Journal Page Range
p. 86-94
ISSN
1110-0451
CODEN
AJNADV

INIS