Isospin dependence of collective flow in heavy-ion collisions at intermediate energies

Abstract

Within the framework of an isospin-dependent Boltzmann-Uehling-Uhlenbeck (BUU) model using initial proton and neutron densities calculated from the nonlinear relativistic mean-field (RMF) theory, we compare the strength of transverse collective flow in reactions ${}^{48}Ca{+}^{58}Fe$ and ${}^{48}Cr{+}^{58}Ni$, which have the same mass number but different neutron/proton ratios. The neutron-rich system (${}^{48}Ca{+}^{58}Fe$) is found to show significantly stronger negative deflection and consequently has a higher balance energy, especially in peripheral collisions. NOTE ADDED IN PROOF: The new phenomenon predicted in this work has just been confirmed by an experiment done by G.D. Westfall et al. using the NSCL/MSU radioactive beam facility and a spartan soccer. A paper by R. Pak et al. is submitted to PRL to report the experimental result.

arXiv commentLatex file, 9 pages, 4 figures availabe upon request; Phys. Rev. Lett. (June 3, 1996) in press

References in corpus (6)

• Transverse momentum analysis of collective motion in relativistic nuclear collisions
• Microscopic Calculation of in-Medium Proton-Proton Cross Sections
• Nuclear Flow Excitation Function
• Momentum--dependent nuclear mean fields and collective flow in heavy ion collisions
• Shell Effects in Nuclei Near Neutron Drip
• Isospin non-equilibrium in heavy-ion collisions at intermediate energies

Cited by in corpus (51)

• Recent Progress and New Challenges in Isospin Physics with Heavy-Ion Reactions
• Reaction Dynamics with Exotic Beams
• Probing the High Density Behaviour of Nuclear Symmetry Energy with High Energy Heavy-Ion Collisions
• Results of the ASY-EOS experiment at GSI: The symmetry energy at suprasaturation density
• Equation of state of asymmetric nuclear matter and collisions of neutron-rich nuclei
• Neutron-Proton Differential Flow as a Probe of Isospin-Dependence of Nuclear Equation of State
• Flow systematics from SIS to SPS energies
• Light cluster production in intermediate energy heavy-ion collisions induced by neutron-rich nuclei
• High Density Behaviour of Nuclear Symmetry Energy and High Energy Heavy-Ion Collisions
• Light clusters production as a probe to the nuclear symmetry energy
• Isospin effects on the energy of vanishing flow in heavy-ion collisions
• Elliptic flow in heavy ion collisions near the balance energy
• Effect of symmetry energy on two-nucleon correlation functions in heavy-ion collisions induced by neutron-rich nuclei
• Mass Dependence of Disappearance of Transverse Flow
• Neutron-proton elliptic flow difference as a probe for the high density dependence of the symmetry energy
• Isospin effects in the disappearance of flow as a function of colliding geometry
• Study of intermediate velocity products in the Ar+Ni collisions between 52 and 95 A.MeV
• Isospin Dependence of Nucleon-Nucleon Elastic Cross Section
• Measurements of sideward flow around the balance energy
• Differential flow in heavy-ion collisions at balance energies
• Influence of momentum-dependent interactions on balance energy and mass dependence
• Isospin effects on two-nucleon correlation functions in heavy-ion collisions at intermediate energies
• Isospin influences on particle emission and critical phenomenon in nuclear dissociation
• Isospin dependence of projectile-like fragment production at intermediate energies
• Probing the Nuclear Symmetry Energy with Heavy-Ion Reactions Induced by Neutron-Rich Nuclei
• Isospin effects on the mass dependence of balance energy
• Systematic study of isoscaling behavior in projectile fragmentation by the statistical abrasion-ablation model
• Entrance channel dependence and isospin dependence of preequilibrium nucleon emission in intermediate energy heavy ion collisions
• Probing Mechanical and Chemical Instabilities in Neutron-Rich Matter
• On the sensitivity of transverse flow to the isospin-dependent cross-section and symmetry energy
• $e^{+}{e}^{-}$ pairs from ${\pi }^{-}$A reactions
• Influence of a momentum dependent interaction on the isospin dependence of fragmentation and dissipation in intermediate energy heavy ion collisions
• Probing the Isospin Dependent In-Medium Nucleon-Nucleon Cross Section by Nucleon Emissions
• Isospin relaxation time in heavy-ion collisions at intermediate energies
• On the participant-spectator matter and thermalization of neutron-rich systems in heavy-ion collisions
• Effect of nucleon effective mass and symmetry energy on the neutrino mean free path in a neutron star
• Role of isospin dependent mean field in pion production in heavy ion reactions
• Experimental balance energies and isospin-dependent nucleon-nucleon cross-sections
• Effects of the high-momentum tail of nucleon momentum distribution on the isospin-sensitive observables
• Influence of medium correction of nucleon nucleon cross section on the fragmentation and nucleon emission
• Reconstruction of Bremsstrahlung $\gamma$-rays Spectrum in Heavy Ion Reactions with Richardson-Lucy Algorithm
• Probing the EOS of dense neutron-rich matter with high-energy radioactive beams
• On the density and temperature of neutron-rich systems at the energy of vanishing flow in heavy-ion collisions
• Medium influence of the nucleon nucleon cross section on the fragmentation
• Isospin Dependence of Mechanical and Chemical Instabilities in Neutron-Rich Matter
• Precise Measurement of Short-Range Correlations in Nuclei from Bremsstrahlung Gamma Ray Emission in Low-Energy Heavy-Ion Collisions
• N/Z and N/A dependence of balance energy as a probe of symmetry energy in heavy-ion collisions
• Probing the high-density behavior of nuclear symmetry energy with high-energy radioactive beams
• Experimental Study of Bremsstrahlung Gamma Ray Emission and Short-Range Correlations in ${}^{124}$Sn+${}^{124}$Sn Collisions at 25 MeV/u
• Impact parameter dependence of the isospin effects and mass dependence of balance energy
• Rearrangements of interacting Fermi liquids