Interactions of 10.6 GeV/n gold nuclei with light and heavy target nuclei in nuclear emulsion

Cherry, M.L. ; Dabrowska, A. ; Deines-Jones, P. ; et al.
Z.Phys.C 63 (1994) 549-556, 1994.
Inspire Record 1385260 DOI 10.17182/hepdata.14108

We have investigated the particle production and fragmentation of nuclei participating in the interactions of 10.6 GeV/n gold nuclei in nuclear emulsions. A new criterion has been found to distinguish between the interactions of these gold nuclei with the light (H,C,N,O) and heavy (Ag, Br) target nuclei in the emulsion. This has allowed separate analyses of the multiplicity and pseudo-rapidity distributions of the singly charged particles emitted in Au-(H,C,N,O) and Au-(Ag,Br) interactions, as well as of the modes of breakup of the projectile and target nuclei. The pseudo-rapidity distributions show strong forward asymmetries, particularly for the interactions with the light nuclei. Heavy target nuclei produce a more severe breakup of the projectile gold nucleus than do the lighter targets. A negative correlation between the number of fragments emitted from the target nuclei and the degree of centrality of the collisions has been observed, which can be attributed to the total destruction of the relatively light target nuclei by these very heavy projectile nuclei.

4 data tables

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Evidence for a nuclear phase transition in target nuclei after relativistic nuclear interactions

The KLM collaboration Dabrowska, A. ; Holynski, R. ; Olszewski, A. ; et al.
Z.Phys.C 59 (1993) 399-404, 1993.
Inspire Record 355033 DOI 10.17182/hepdata.40646

The degree of excitation of the emulsion target nuclei due to nuclear interactions of oxygen and sulfur projectiles at 200 GeV/nucleon incident energy has been investigated. Using the plausible assumption that the numberNb of slow particles emitted from the struck target nucleus can be interpreted as a measure of the temperatureT of the residual nucleus, we have found that there exists a critical temperatureTc of the excited target nucleus. For Ag and Br target nuclei this temperature corresponds to <Nb>≌12 and it is attained when the impact parameters are less than about 4 fm.

2 data tables

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Particle production in interactions of 200-GeV/nucleon oxygen and sulfur nuclei in nuclear emulsion

The KLM collaboration Dabrowska, A. ; Holynski, R. ; Jurak, A. ; et al.
Phys.Rev.D 47 (1993) 1751-1761, 1993.
Inspire Record 338512 DOI 10.17182/hepdata.40446

Oxygen and sulfur nuclei with energies of 200 GeV/nucleon have been allowed to interact in nuclear emulsions exposed at CERN. These emulsions have been scanned with a minimum bias so that essentially all the interactions occurring were detected. Nearly 1000 interactions of each projectile have been analyzed. We present results on the multiplicity distributions, the pseudorapidity distributions, and the fragmentation of the projectile and target nuclei. It is shown that the mean number of intranuclear collisions in each interaction, calculated from a superposition model, provides a useful parameter for organizing the data. We conclude that there are no significant deviations even at these energies from models, such as the venus model, describing the interactions as being the superposition of individual nucleon-nucleon collisions.

3 data tables

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