Bibliographies thématiques / Neutron-proton equilibration

Littérature scientifique sur le sujet « Neutron-proton equilibration »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Neutron-proton equilibration"

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McIntosh, Alan B., et Sherry J. Yennello. « Interplay of neutron–proton equilibration and nuclear dynamics ». Progress in Particle and Nuclear Physics 108 (septembre 2019) : 103707. http://dx.doi.org/10.1016/j.ppnp.2019.06.001.

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DI TORO, M., M. COLONNA, V. GRECO, G. FERINI, C. RIZZO, J. RIZZO, V. BARAN et al. « CONSTRAINING THE SYMMETRY ENERGY : A JOURNEY IN THE ISOSPIN PHYSICS FROM COULOMB BARRIER TO DECONFINEMENT ». International Journal of Modern Physics E 17, no 09 (octobre 2008) : 1799–814. http://dx.doi.org/10.1142/s0218301308010799.

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Heavy Ion Collisions (HIC) represent a unique tool to probe the in-medium nuclear interaction in regions away from saturation. In this work we present a selection of reaction observables in dissipative collisions particularly sensitive to the isovector part of the interaction, i.e.to the symmetry term of the nuclear Equation of State (EoS). At low energies the behavior of the symmetry energy around saturation influences dissipation and fragment production mechanisms. We will first discuss the recently observed Dynamical Dipole Radiation, due to a collective neutron-proton oscillation during the charge equilibration in fusion and deep-inelastic collisions. Important Iso - EOS are stressed. Reactions induced by unstable 132 Sn beams appear to be very promising tools to test the sub-saturation Isovector EoS. New Isospin sensitive observables are also presented for deep-inelastic, fragmentation collisions and Isospin equilibration measurements (Imbalance Ratios). The high density symmetry term can be derived from isospin effects on heavy ion reactions at relativistic energies (few AGeV range), that can even allow a "direct" study of the covariant structure of the isovector interaction in the hadron medium. Rather sensitive observables are proposed from collective flows and from pion/kaon production. The possibility of the transition to a mixed hadron-quark phase, at high baryon and isospin density, is finally suggested. Some signatures could come from an expected "neutron trapping" effect. The importance of studying violent collisions with radioactive beams from low to relativistic energies is finally stressed.
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DI TORO, M., M. COLONNA, C. RIZZO et V. BARAN. « THE DYNAMICAL DIPOLE RADIATION IN DISSIPATIVE COLLISIONS WITH EXOTIC BEAMS ». International Journal of Modern Physics E 17, no 01 (janvier 2008) : 110–19. http://dx.doi.org/10.1142/s0218301308009604.

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Heavy Ion Collisions (HIC) represent a unique tool to probe the in-medium nuclear interaction in regions away from saturation. In this work we present a selection of reaction observables in dissipative collisions particularly sensitive to the isovector part of the interaction, i.e. to the symmetry term of the nuclear Equation of State (EoS). At low energies the behavior of the symmetry energy around saturation influences dissipation and fragment production mechanisms. We will first discuss the recently observed Dynamical Dipole Radiation, due to a collective neutron-proton oscillation during the charge equilibration in fusion and deep-inelastic collisions. We will review in detail all the main properties, yield, spectrum, damping and angular distributions, revealing important isospin effects. Reactions induced by unstable 132Sn beams appear to be very promising tools to test the sub-saturation Isovector EoS. Predictions are also presented for deep-inelastic and fragmentation collisions induced by neutron rich projectiles. The importance of studying violent collisions with radioactive beams at low and Fermi energies is finally stressed.
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Li, Bao-An, Che Ming Ko et Wolfgang Bauer. « Isospin Physics in Heavy-Ion Collisions at Intermediate Energies ». International Journal of Modern Physics E 07, no 02 (avril 1998) : 147–229. http://dx.doi.org/10.1142/s0218301398000087.

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In nuclear collisions induced by stable or radioactive neutron-rich nuclei a transient state of nuclear matter with an appreciable isospin asymmetry as well as thermal and compressional excitation can be created. This offers the possibility to study the properties of nuclear matter in the region between symmetric nuclear matter and pure neutron matter. In this review, we discuss recent theoretical studies of the equation of state of isospin-asymmetric nuclear matter and its relations to the properties of neutron stars and radioactive nuclei. Chemical and mechanical instabilities as well as the liquid-gas phase transition in asymmetric nuclear matter are investigated. The in-medium nucleon-nucleon cross sections at different isospin states are reviewed as they affect significantly the dynamics of heavy ion collisions induced by radioactive beams. We then discuss an isospin-dependent transport model, which includes different mean-field potentials and cross sections for the proton and neutron, and its application to these reactions. Furthermore, we review the comparisons between theoretical predictions and available experimental data. In particular, we discuss the study of nuclear stopping in terms of isospin equilibration, the dependence of nuclear collective flow and balance energy on the isospin-dependent nuclear equation of state and cross sections, the isospin dependence of total nuclear reaction cross sections, and the role of isospin in preequilibrium nucleon emissions and subthreshold pion production.
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Ball, Philip. « Proton-Neutron Equilibration Takes Just 0.3 Zeptoseconds ». Physics 10 (10 février 2017). http://dx.doi.org/10.1103/physics.10.16.

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Jedele, A., A. B. McIntosh, K. Hagel, M. Huang, L. Heilborn, Z. Kohley, L. W. May et al. « Characterizing Neutron-Proton Equilibration in Nuclear Reactions with Subzeptosecond Resolution ». Physical Review Letters 118, no 6 (10 février 2017). http://dx.doi.org/10.1103/physrevlett.118.062501.

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Rodriguez Manso, A., A. B. McIntosh, A. Jedele, K. Hagel, L. Heilborn, Z. Kohley, L. W. May, A. Zarrella et S. J. Yennello. « Detailed characterization of neutron-proton equilibration in dynamically deformed nuclear systems ». Physical Review C 95, no 4 (5 avril 2017). http://dx.doi.org/10.1103/physrevc.95.044604.

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Jedele, A., K. Hagel, M. Q. Sorensen, B. Harvey, A. Abbott, J. Gauthier, A. Hannaman et al. « Investigating the time dependence of neutron-proton equilibration using molecular dynamics simulations ». Physical Review C 107, no 2 (1 février 2023). http://dx.doi.org/10.1103/physrevc.107.024601.

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May, L. W., A. Wakhle, A. B. McIntosh, Z. Kohley, S. Behling, A. Bonasera, G. Bonasera et al. « Neutron-proton equilibration in 35 MeV/ u collisions of 64,70 Zn + 64,70 Zn and 64 Zn, 64 Ni + 64 Zn, 64 Ni quantified using triplicate probes ». Physical Review C 98, no 4 (3 octobre 2018). http://dx.doi.org/10.1103/physrevc.98.044602.

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Thèses sur le sujet "Neutron-proton equilibration"

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Camaiani, Alberto, Giovanni Casini et Andrea Stefanini. « Complete isotopic characterization of projectile fragments in Ca+Ca reactions at Fermi energies with the FAZIA array ». Doctoral thesis, 2020. http://hdl.handle.net/2158/1204443.

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This thesis is part of the studies that the international FAZIA collaboration is performing on heavy-ion collision experiments using the new setup of telescopes developed in the last decade, capable of excellent capabilities in terms of ion identification. In this thesis, we analyzed the data of Ca+Ca reactions, collected in one of the first experiments using the new FAZIA telescopes. The beams were accelerated at 35 MeV/u, well within the so-called Fermi energy range. The main goal of the experiment was an accurate study of the semi-peripheral collisions, in particular from the point of view of the mechanisms that intervene in the neutron-to-proton equilibration, accessing for the first time to the neutron content of the quasi-projectile remnant.
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Actes de conférences sur le sujet "Neutron-proton equilibration"

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Jedele, Andrea, Alan McIntosh, Kris Hagel, Lauren Heilborn, Zach Kohley, Ellen McCleskey, Alis Rodriguez Manso, Michael Youngs, Andrea Zarrella et Sherry Yennello. « Equilibration chronometry : characterizing neutron-proton equilibration within a strongly deformed nuclear system with sub-zeptosecond resolution ». Dans The 26th International Nuclear Physics Conference. Trieste, Italy : Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.281.0229.

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