Leifels, Y. (2016) Probing the nuclear symmetry energy at high densities with nuclear reactions. Il nuovo cimento C, 39 (6). pp. 1-10. ISSN 1826-9885
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Abstract
The nuclear equation of state is a topic of highest current interest in nuclear structure and reactions as well as in astrophysics. The symmetry energy is the part of the equation of state which is connected to the asymmetry in the neutron/proton content. During recent years a multitude of experimental and theoretical efforts on different fields have been undertaken to constraint its density dependence at low densities but also above saturation density (ρ0 =0 .16fm−3). Conventionally the symmetry energy is described by its magnitude Sv and the slope parameter L, both at saturation density. Values of L = 44–66MeV and Sv = 31– 33MeV have been deduced in recent compilations of nuclear structure, heavy-ion reaction and astrophysics data. Apart from astrophysical data on mass and radii of neutron stars, heavy-ion reactions at incident energies of several 100MeV are the only means do access the high density behaviour of the symmetry energy. In particular, meson production and collective flows upto about 1 AGeV are predicted to be sensitive to the slope of the symmetry energy as a function of density. From the measurement of elliptic flow of neutrons with respect to charged particles at GSI, a more stringent constraint for the slope of the symmetry energy at supra-saturation densities has been deduced. Future options to reach even higher densities will be discussed.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 16 Nov 2020 20:56 |
| Last Modified: | 16 Nov 2020 20:56 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/19732 |
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