Stopping and Radial Flow in Central 58Ni + 58Ni Collisions between 1 and 2 AGeV

Abstract

The production of charged pions, protons and deuterons has been studied in central collisions of 58Ni on 58Ni at incident beam energies of 1.06, 1.45 and 1.93 AGeV. The dependence of transverse-momentum and rapidity spectra on the beam energy and on the centrality of the collison is presented. It is shown that the scaling of the mean rapidity shift of protons established for AGS and SPS energies is valid down to 1 AGeV. The degree of nuclear stopping is discussed; the IQMD transport model reproduces the measured proton rapidity spectra for the most central events reasonably well, but does not show any sensitivity between the soft and the hard equation of state (EoS). A radial flow analysis, using the midrapidity transverse-momentum spectra, delivers freeze-out temperatures T and radial flow velocities beta_r which increase with beam energy up to 2 AGeV; in comparison to existing data of Au on Au over a large range of energies only beta_r shows a system size dependence.

References in corpus (10)

• Thermal Equilibration and Expansion in Nucleus-Nucleus Collision at the AGS
• Thermal and Hadrochemical Equilibration in Nucleus-Nucleus Collisions at the SPS
• Central Collisions of Au on Au at 150, 250 and 400 A MeV
• Effects of Compression and Collective Expansion on Particle Emission from Central Heavy-Ion Reactions
• On the transverse momentum distribution of strange hadrons produced in relativistic heavy ion collisions
• Azimuthal correlations of pions in relativistic heavy ion collisions at 1 GeV/nucl.
• Radial Flow in Au+Au Collisions at E=0.25-1.15 A GeV
• Subthreshold kaon production and the nuclear equation of state
• Abundance of Delta Resonances in 58Ni+58Ni Collisions between 1 and 2 AGeV
• Charged pions from Ni on Ni collisions between 1 and 2 AGeV

Cited by in corpus (27)

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• Systematics of central heavy ion collisions in the 1A GeV regime
• Influence of Impact Parameter on Thermal Description of Relativistic Heavy Ion Collisions at GSI/SIS
• Isospin-tracing: A probe of non-equilibrium in central heavy-ion collisions
• Baryon Rapidity Loss in Relativistic Au+Au Collisions
• Strangeness Production in the HSD Transport Approach from SIS to SPS energies
• Deuteron production from phase-space coalescence in the UrQMD approach
• Invariant-Mass Spectroscopy for Condensed Single- and Double-\kbar Nuclear Clusters to be Formed as Residues in Relativistic Heavy-Ion Collisions
• Kaons and antikaons in hot and dense hadronic matter
• Neutral Pions and Eta Mesons as Probes of the Hadronic Fireball in Nucleus-Nucleus Collisions around 1A GeV
• Hadronic Particle Production in Nucleus-Nucleus Collisions
• K^0 and Λproduction in Ni + Ni collisions near threshold
• $K^{-}/K^{+}$ ratios in relativistic heavy-ion collisions
• Azimuthal Emission Patterns of $K^{+}$ and of $K^{-}$ Mesons in Ni + Ni Collisions near the Strangeness Production Threshold
• Sub-threshold phi-meson yield in central 58Ni+58Ni collisions
• Charged pion production in ${}_{44}^{96}$Ru+${}_{44}^{96}$Ru collisions at 400A and 1528A MeV
• From fusion to total disassembly: global stopping in heavy-ion collisions
• Continuous Decoupling of Dynamically Expanding Systems
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• Proton stopping in C+C, d+C, C+Ta and d+Ta collisions at 4.2A GeV/c
• Transport Model Comparison Studies of Intermediate-Energy Heavy-Ion Collisions