The in-medium nucleon-nucleon cross section and BUU simulations of heavy-ion reactions

Alm, T.; Röpke, G.; Bauer, Wolfgang; Daffin, F.; Schmidt, Martin

doi:10.1016/0375-9474(95)00026-w

Cited by 51 publications

(44 citation statements)

References 29 publications

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“…[127]. The effect of the pairing correlations on the cross sections yields a cusp-like behavior around k F reminiscent of the enhancement of the cross sections obtained by the Rostock group at finite temperature [119,126]…”

Section: In-medium Cross Sections and Phase Shiftsmentioning

confidence: 69%

Self-consistent Green's function method for nuclei and nuclear matter

Dickhoff

Barbieri

2004

Progress in Particle and Nuclear Physics

500

599

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Recent results obtained by applying the method of self-consistent Green's functions to nuclei and nuclear matter are reviewed. Particular attention is given to the description of experimental data obtained from the (e,e ′ p) and (e,e ′ 2N) reactions that determine one and two-nucleon removal probabilities in nuclei since the corresponding amplitudes are directly related to the imaginary parts of the single-particle and two-particle propagators. For this reason and the fact that these amplitudes can now be calculated with the inclusion of all the relevant physical processes, it is useful to explore the efficacy of the method of self-consistent Green's functions in describing these experimental data. Results for both finite nuclei and nuclear matter are discussed with particular emphasis on clarifying the role of short-range correlations in determining various experimental quantities. The important role of long-range correlations in determining the structure of lowenergy correlations is also documented. For a complete understanding of nuclear phenomena it is therefore essential to include both types of physical correlations. We demonstrate that recent experimental results for these reactions combined with the reported theoretical calculations yield a very clear understanding of the properties of all protons in the nucleus. We propose that this knowledge of the properties of constituent fermions in a correlated many-body system is a unique feature of nuclear physics.

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Section: In-medium Cross Sections and Phase Shiftsmentioning

confidence: 69%

Self-consistent Green's function method for nuclei and nuclear matter

Dickhoff

Barbieri

2004

Progress in Particle and Nuclear Physics

500

599

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“…This indicates the need for an in-medium reduction of the NN cross section. This type of reduction was first found to be needed in studies of the disappearance of flow [16] and later also in theoretical studies based on thermodynamic T -matrix theory at finite temperature [17]. These results were obtained by algorithm with closest approach techniques.…”

Section: Results and Conclusionmentioning

confidence: 99%

Nuclear flow in consistent Boltzmann algorithm models

Kortemeyer¹,

Daffin²,

Bauer³

1996

Physics Letters B

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We investigate the stochastic Direct Simulation Monte Carlo method (DSMC) for numerically solving the collision-term in heavy-ion transport theories of the Boltzmann-Uehling-Uhlenbeck (BUU) type. The first major modification we consider is changes in the collision rates due to excluded volume and shadowing/screening effects (Enskog theory). The second effect studied by us is the inclusion of an additional advection term. These modifications ensure a non-vanishing second virial and change the equation of state for the scattering process from that of an ideal gas to that of a hard-sphere gas. We analyse the effect of these modifications on the calculated value of directed nuclear collective flow in heavy ion collisions, and find that the flow slightly increases.

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“…[87,93,[395][396][397][398][399][400][401][402][403][404][405][406][407][408][409][410][411]. Most of theses studies are carried out for symmetric nuclear matter at zero temperature, and the results vary considerably.…”

Section: Theoretical Predictions and Experimental Information On Nn Cmentioning

confidence: 99%

Recent progress and new challenges in isospin physics with heavy-ion reactions

2008

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The ultimate goal of studying isospin physics via heavy-ion reactions with neutron-rich, stable and/or radioactive nuclei is to explore the isospin dependence of in-medium nuclear effective interactions and the equation of state of neutron-rich nuclear matter, particularly the isospin-dependent term in the equation of state, i.e., the density dependence of the symmetry energy. Because of its great importance for understanding many phenomena in both nuclear physics and astrophysics, the study of the density dependence of the nuclear symmetry energy has been the main focus of the intermediate-energy heavy-ion physics community during the last decade, and significant progress has been achieved both experimentally and theoretically. In particular, a number of phenomena or observables have been identified as sensitive probes to the density dependence of the nuclear symmetry energy. Experimental studies have confirmed some of these interesting isospin-dependent effects and allowed us to constrain relatively stringently the symmetry energy at sub-saturation densities. The impacts of this constrained density dependence of the symmetry energy on the properties of neutron stars have also been studied, and they were found to be very useful for the astrophysical community. With new opportunities provided by the various radioactive beam facilities being constructed around the world, the study of isospin physics is expected to remain one of the forefront research areas in nuclear physics. In this report, we review the major progress achieved during the last decade in isospin physics with heavy ion reactions and discuss future challenges to the most important issues in this field.Key words: Equation of state of asymmetric nuclear matter, Nuclear symmetry energy, Heavy-ion reactions with neutron-rich nuclei, Neutron skin thickness of heavy nuclei, Neutron stars Constraining the Skyrme effective interactions and the neutron skin thickness of heavy nuclei using terrestrial nuclear laboratory data 216 8

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The in-medium nucleon-nucleon cross section and BUU simulations of heavy-ion reactions

Cited by 51 publications

References 29 publications

Self-consistent Green's function method for nuclei and nuclear matter

Self-consistent Green's function method for nuclei and nuclear matter

Nuclear flow in consistent Boltzmann algorithm models

Recent progress and new challenges in isospin physics with heavy-ion reactions

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