CHARACTERISTICS OF RELATIVISTIC CHARGED PARTICLES PRODUCED IN 24Mg–EMULSION INTERACTIONS AT 4.5A GeV/C

2001 ◽  
Vol 10 (01) ◽  
pp. 55-68 ◽  
Author(s):  
N. N. ABD ALLAH ◽  
S. A. H. ABOU-STEIT ◽  
M. MOHERY ◽  
S. S. ABDEL-AZIZ
Keyword(s):  
Charged Particles ◽  
Heavy Ion ◽  
Scaling Behavior ◽  
Final State ◽  
Azimuthal Correlations ◽  
Ion Interactions ◽  
Multiplicity Distributions ◽  
Pseudorapidity Distributions ◽  
Relativistic Particles

The interactions of 4.5A GeV/c 24 Mg nuclei with emulsion have been studied. The multiplicity distributions of all the produced target protons from 24 Mg –emulsion interactions has been found to obey the KNO scaling behavior. The angular characteristics of the relativistic charged particles have been investigated and their dependence on the multiplicity of the relativistic shower particles has been studied. The results reveal that increasing the multiplicity of the shower particles, leads to a shift of the peak of the pseudorapidity distributions towards the lower values of the pseudorapidity and also to a decrease of the average pseudorapidity. The study of the rapidity dispersion of the relativistic charged particles shows that the clusterization effect is significant among the final state of the relativistic particles produced in the heavy-ion interactions. Azimuthal correlations in the angles of the relativistic charged particles have been investigated.

Some Results on Angular Characteristics of Relativistic Charged Particles Produced in 12C-emulsion Interactions at 4.5 A GeV/c

1998 ◽  
Vol 07 (06) ◽  
pp. 659-667 ◽  
Author(s):  
Prithipal Singh ◽  
H. Khushnood
Keyword(s):  
Charged Particles ◽  
Heavy Ion ◽  
Angular Distributions ◽  
Final State ◽  
Angular Characteristic ◽  
Ion Interactions ◽  
Singly Charged ◽  
Relativistic Particles

An attempt has been made to study the angular characteristic of relativistic charged particles produced in 4.5 A GeV/c 12C-emulsion collisions. The dependence of these characteristics on the multiplicity of the relativistic particles, Ns, has also been investigated. The results reveal that the angular distributions of relativistic particles do not depend on Ns, except at small angles where contribution of singly charged particles fragments enhances the number of relativistic charged particles. It is also observed that the maximum of pseudorapidity, η and <η> distributions, shifts towards the lower value of η with increasing multiplicity of Ns. The study of the rapidity dispersion of relativistic charged particles reveals that the clusterization effect occurs significantly among the final state relativistic particles produced in heavy ion interactions.

The multiplicity characteristics of 7Li-Em interactions as a function of noninteracting projectile nucleons

2020 ◽  
Vol 29 (08) ◽  
pp. 2050063
Author(s):  
M. Mohery ◽  
E. M. Sultan ◽  
N. N. Abdallah ◽  
M. H. Farghaly
Keyword(s):  
Impact Parameter ◽  
Charged Particles ◽  
Heavy Ion ◽  
The Other ◽  
Total Charge ◽  
Secondary Particles ◽  
Ion Interactions ◽  
Charged Secondary ◽  
The Impact ◽  
Relativistic Particles

In this work, the interactions of 7Li nuclei with emulsion at 3 A GeV/c were studied. Multiplicity of the charged secondary particles as well as the charge of the outgoing projectile fragments were measured, while correlations among them are discussed. The values of the total charge of the noninteracting projectile nucleons and the average number of interacting projectile nucleons are estimated. The dependence of the secondary particles on the number of heavily-ionized tracks is analyzed. The results show that interactions of 7Li nuclei with emulsion nuclei exhibit a number of regularities, which had been noted in experiments with lighter nuclei. The absorption of relativistic particles, while increasing the degree of target destruction, is observed. The average multiplicities of the secondary charged particles depend on the impact parameter, as their values increase, while decreasing the impact parameter. The number of secondary charged particles in the heavy-ion interactions depends on the degree of disintegration of the target nuclei. This dependence is not observed in the case of the interaction of hadron with emulsion. The experimental data of the interaction of 7Li are systematically compared with the other interactions at different energies. The results agree with the corresponding results at nearly the same energy.

scholarly journals Multiplicity and pseudorapidity distributions of charged particles from32S induced heavy ion interactions at 200A GeV

1992 ◽  
Vol 55 (4) ◽  
pp. 539-548 ◽  
Author(s):  
R. Albrecht ◽  
T. C. Awes ◽  
C. Baktash ◽  
P. Beckmann ◽  
F. Berger ◽  
...  
Keyword(s):  
Charged Particles ◽  
Heavy Ion ◽  
Ion Interactions ◽  
Pseudorapidity Distributions

THE HYDRODYNAMIC DESCRIPTION OF THE ENERGY AND CENTRALITY DEPENDENCES OF THE PSEUDORAPIDITY DISTRIBUTIONS OF THE PRODUCED CHARGED PARTICLES IN Au+Au COLLISIONS

2013 ◽  
Vol 22 (09) ◽  
pp. 1350069 ◽  
Author(s):  
ZHIJIN JIANG ◽  
QINGGUANG LI ◽  
GUANXIANG JIANG
Keyword(s):  
Hydrodynamic Model ◽  
Charged Particles ◽  
Heavy Ion ◽  
High Energy ◽  
Hydrodynamic Description ◽  
Gaussian Form ◽  
Ion Collisions ◽  
Phobos Collaboration ◽  
Rapidity Distributions ◽  
Pseudorapidity Distributions

By using the revised Landau hydrodynamic model and taking into account the effect of leading particles, we discuss the pseudorapidity distributions of produced charged particles in high energy heavy-ion collisions. The charged particles resulted from the freeze-out of the matter produced in collisions possess the Gaussian-like rapidity distributions. The leading particles are assumed having the rapidity distributions of the Gaussian form with the normalization constant being equal to the number of participants, which can be figured out in theory. It is found that the results from the revised Landau hydrodynamic model together with the contributions from leading particles are well consistent with the experimental data carried out by BNL-RHIC-PHOBOS Collaboration in different centrality Au + Au collisions at energies of [Formula: see text], 130 and 62.4 GeV , respectively.

scholarly journals A Description of Pseudorapidity Distributions of Charged Particles Produced in Au+Au Collisions at RHIC Energies

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Z. J. Jiang ◽  
Dongfang Xu ◽  
Yan Huang
Keyword(s):  
Phase Transition ◽  
Heavy Ion Collisions ◽  
Charged Particles ◽  
Dense Matter ◽  
Heavy Ion ◽  
High Energy ◽  
Low Energy ◽  
Ion Collisions ◽  
Rapidity Distributions ◽  
Pseudorapidity Distributions

In heavy ion collisions, charged particles come from two parts: the hot and dense matter and the leading particles. In this paper, the hot and dense matter is assumed to expand according to the hydrodynamic model including phase transition and decouples into particles via the prescription of Cooper-Frye. The leading particles are as usual supposed to have Gaussian rapidity distributions with the number equaling that of participants. The investigations of this paper show that, unlike low energy situations, the leading particles are essential in describing the pseudorapidity distributions of charged particles produced in high energy heavy ion collisions. This might be due to the different transparencies of nuclei at different energies.

VALIDITY OF NAKAMURA-KUDO SCALING OF CHARGED PARTICLE PSEUDORAPIDITY DISTRIBUTION IN RELATIVISTIC HEAVY ION INTERACTIONS

1990 ◽  
Vol 05 (30) ◽  
pp. 2485-2489 ◽  
Author(s):  
DIPAK GHOSH ◽  
AMITABHA MUKHOPADHYAY ◽  
SHARMILA SARKAR ◽  
RANJAN SENGUPTA ◽  
ANIT GHOSH ◽  
...  
Keyword(s):  
Charged Particle ◽  
Heavy Ion ◽  
Scaling Behavior ◽  
Pseudorapidity Distribution ◽  
Ion Interactions ◽  
Scaling Variables ◽  
Remarkable Agreement

This letter reports an analysis of our own emulsion data in terms of charged particle pseudorapidity distribution in the cases of 12 C-Ag/Br , 24 Mg-Ag/Br at 4.5 A GeV/c, and 16 O-Ag/Br at 2.1 A GeV. The data are compared with the analyses using two scaling variables recently proposed by Kenju Mori et al. and Nakamura and Kudo. In all cases the data show a remarkable agreement with the scaling behavior of Nakamura and Kudo. The data obtained for 16 O + AgBr interactions at 14.6 A GeV, 60 A GeV, and 200 A GeV are also in favor of the Nakamura-Kudo scaling.

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