Pseudorapidity density and multiplicity distributions of charged particles produced in heavy-ion collisions at the BNL AGS have been studied. The multiplicity distributions and pseudorapidity ...distributions of shower particles in Au-induced interactions are presented and compared with model predictions from RQMD, FRITIOF and VENUS. It is shown that the widths of the pseudorapidity distributions of produced particles in central collisions are independent of the interacting system. The results from EMU01 have been compared, and found to agree, with the results from two other heavy-ion experiments, E802 and E814.
EMU01 experiments tracking high energy heavy-ion interactions with nuclear emulsion detectors are performed at the BNL AGS and the CERN SPS. Some unique measurements are presented. As an illustration ...impact parameter selections, projectile fragmentation and particle production are discussed. Recent results from gold nucleus reactions at 11 A GeV are given.
Experimental results on peripheral fragmentation of relativistic \(^{11}\)B nuclei are presented. In the experiment the emulsions exposured to \(^{11}\)B beam with momentum 2.75 A GeV/c at the JINR ...Nuclotron are used. The relative probability of various fragmentation channels for nucleus breakups (class A) and more violent peripheral interactions (class B) have been determined. For classes under investigations the sum of the fragment charges in narrow forward cone is equal to the projectile charge, but in the events of class A there are no secondary particles and in the events of class B there are. In both classes the main channels is \(^{11}\)B\(\to\)2He+X: 62% and 50%, corresponding. The main channel \(^{11}\)B\(\to\)2(Z\(_{fr}\)=2)+(Z\(_{fr}\)=1) was investigated in details. Momentum measurements of single-charged fragments have been done to determine number of p, d and t in the channel. This way it was found that the ratio N\(_{p}\) : N\(_{d}\) : N\(_{t}\) is about 1:1:1 for \(^{11}\)B nuclei dissociation and about 15:5:1 for peripheral interactions of \(^{11}\)B nuclei.
Angular distributions of charged particles produced in
16O and
32S collisions with nuclear track emulsion were studied at momenta 4.5 and 200 A GeV/c. Comparison with the angular distributions of ...charged particles produced in proton-nucleus collisions at the same momentum allows to draw the conclusion, that the angular distributions in nucleus-nucleus collisions can be seen as superposition of the angular distributions in nucleon-nucleus collisions taken at the same impact parameter
b
NA
, that is mean impact parameter between the participating projectile nucleons and the center of the target nucleus
