7 research outputs found
Analysis of hadron production in nucleus-nucleus interactions up to and out of kinematical limit of free NN-collisions in the frame of FRITIOF model
In the framework of the modified FRITIOF model, the inclusive spectra of the
cumulative -, -mesons and protons produced in the
nucleus-nucleus interactions at 4.5 GeV/c/nucleon and 4.2 GeV/c/nucleon are
calculated. It is shown that the model reproduces qualitatively, and in some
cases quantitatively the main experimental regularities of -mesons
production, and "soft" part of the proton spectra. According to the model the
production of the cumulative particles is connected with the mechanism of the
"soft" nucleon-nucleon interaction.Comment: 12 pages, 11 figure
Central events in the interactions of and with heavy emulsion targets
Data on the multiplicity of secondaries in central events of
(14.6 AGeV) and (3.7 AGeV) interactions with AgBr emulsion
nuclei have been compiled and studied. The dependence of the multiplicities
of the outgoing charged stripping particles on the number of interacting
nucleons and therefore on the impact parameter, as indicated by the target
size, and consequently, on the degree of centrality is investigated. The
resultant multiplicity distribution of the produced pions for each studied
case is fitted by both Negative Binomial (NB) and Poisson distributions. The
NB distribution is valid for most of the considered cases. The transparency
of the target for a projectile was found to become more pronounced as the
incident energy increased
Backward slow protons production in the inelastic interactions of Li and Li nuclei with emulsion nuclei at Dubna energy
We report the experimental measurements on the multiplicity of slow
target associated particles, in the forward () and backward () hemispheres,
and the different correlations between the backward slow protons and
the production of hadrons in both hemispheres in the
interactions of 3.7 A GeV) and 2.2 A GeV) with
emulsion nuclei. The study of the number of backward slow protons
( and ) indicates that while
the number of backward black particles, , is a good factor
representing the purely target fragments, the number of backward grey
particles, , can be considered as an accurate experimental
factor for the impact parameter dependence of the collision. It is
also shown that the most central collisions are events having
and . We confront the data with a multiple
scattering model incorporating both binary cascading and evaporation
of residual nucleus. The model applies well in the region of limited
cascading (backward hemisphere). As for the forward hemisphere,
where cascading becomes more branched, the model becomes less applicable