Original scientific paper
Study of relativistic forward-backward hadron production in the interactions of 3He and 4He with emulsion nuclei at Dubna energy
A. Abdelsalam
; Physics Department, Faculty of Science, Cairo University, Egypt
M. S. El-Nagdy
; Physics Department, Faculty of Science, Helwan University, Cairo, Egypt
E. A. Shaat
; Physics Department, Faculty of Science, Cairo University, Egypt
N. Ali-Mossa
; Basic Science Department, Faculty of Engineering, Zagazig University, Shoubra, Egypt
O. M. Osman
; Physics Department, Faculty of Science, Cairo University, Egypt
Z. Abou-Moussa
; Physics Department, Faculty of Science, Cairo University, Egypt
S. Kamel
; Physics Department, Faculty of Education, Ain Shams University, Cairo, Egypt
N. Rashed
; Physics Department, Faculty of Science, Cairo University, El-Fayom Branch, Egypt
W. Osman
; Physics Department, Faculty of Science, Cairo University, Egypt
M. E. Hafiz
; Physics Department, Faculty of Education, Ain Shams University, Cairo, Egypt
B. M. Badawy
; Reactor Physics Department, Nuclear Research Center, Atomic Energy Authority Egypt
S. Magd Eldin
; Physics Department, Faculty of Science, Cairo University, Egypt
Abstract
The experimental results on 3He- and 4He-emulsion interactions accompanied by relativistic (shower) hadrons flying into the backward (θlab ≤ 90◦ ) hemisphere at 4.5 AGeV/c are presented and analyzed. The dependence of the probabilities of these interactions on the different target sizes, impact parameter and projectile spectator charges is studied. An investigation of average values and multiplicity distributions of these hadrons for the interactions with light and heavy emulsion nuclei has been carried out. In addition, the correlations between the multiplicities of different types of the emitted particles are studied. The data show that backward shower particles are a sensitive target parameter. The values of impact parameters can be used as good indicators for selecting events which occured with light or heavy emulsion nuclei. A comparison with the modified cascade model shows a good performance in describing the data produced in the region having less cascading (i.e. interactions with light nuclei). As for the interactions with heavy nuclei, the model overestimates the experimental data.
Keywords
3He- and 4He-emulsion interactions; backward shower particles; multiplicity distributions; modified cascade model
Hrčak ID:
304358
URI
Publication date:
1.3.2006.
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