dorsal/arxiv
View SchemaIsospin dependent thermodynamics of fragmentation
| Authors | Ad. R. Raduta, F. Gulminelli |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0611056 |
| URL | https://arxiv.org/abs/nucl-th/0611056 |
| DOI | 10.1103/PhysRevC.75.044605 |
| Journal | Phys.Rev.C75:044605,2007 |
| License | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
Abstract
The thermal and phase properties of a multifragmentation model which uses clusters as degrees of freedom, are explored as a function of isospin. A good qualitative agreement is found with the phase diagram of asymmetric nuclear matter as established by different mean-field models. In particular, from the convexity properties of the nuclear entropy, we show that uncharged finite nuclei display first and second order liquid-gas-like phase transitions. Different quantities are examined to connect the thermal properties of the system to cluster observables. In particular we show that fractionation is only a loose indication of phase coexistence. A simple analytical formula is proposed and tested to evaluate the symmetry (free) energy from the widths of isotopic distributions. Assuming that one may restore the isotopic composition of break-up fragments, it is found that some selected isotopic observables can allow to quantitatively access the freeze-out symmetry energy in multifragmentation experiments.
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"abstract": "The thermal and phase properties of a multifragmentation model which uses\nclusters as degrees of freedom, are explored as a function of isospin. A good\nqualitative agreement is found with the phase diagram of asymmetric nuclear\nmatter as established by different mean-field models. In particular, from the\nconvexity properties of the nuclear entropy, we show that uncharged finite\nnuclei display first and second order liquid-gas-like phase transitions.\nDifferent quantities are examined to connect the thermal properties of the\nsystem to cluster observables. In particular we show that fractionation is only\na loose indication of phase coexistence. A simple analytical formula is\nproposed and tested to evaluate the symmetry (free) energy from the widths of\nisotopic distributions. Assuming that one may restore the isotopic composition\nof break-up fragments, it is found that some selected isotopic observables can\nallow to quantitatively access the freeze-out symmetry energy in\nmultifragmentation experiments.",
"arxiv_id": "nucl-th/0611056",
"authors": [
"Ad. R. Raduta",
"F. Gulminelli"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.75.044605",
"journal_ref": "Phys.Rev.C75:044605,2007",
"license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
"title": "Isospin dependent thermodynamics of fragmentation",
"url": "https://arxiv.org/abs/nucl-th/0611056"
},
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