dorsal/arxiv
View SchemaDynamical aspects of isotopic scaling
| Authors | M. Veselsky |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0607033 |
| URL | https://arxiv.org/abs/nucl-th/0607033 |
| DOI | 10.1103/PhysRevC.74.054611 |
| Journal | Phys.Rev. C74 (2006) 054611 |
Abstract
Investigation of the effect of the dynamical stage of heavy-ion collisions indicates that the increasing width of the initial isospin distributions is reflected by a significant modification of the isoscaling slope for the final isotopic distributions after de-excitation. For narrow initial distributions, the isoscaling slope assumes the limiting value of the two individual initial nuclei while for wide initial isotopic distributions the slope for hot fragments approaches the initial value. The isoscaling slopes for final cold fragments increase due to secondary emissions. The experimentally observed evolution of the isoscaling parameter in multifragmentation of hot quasiprojectiles at E$_{inc}$=50 AMeV, fragmentation of $^{86}$Kr projectiles at E$_{inc}$=25 AMeV and multifragmentation of target spectators at relativistic energies was reproduced by a simulation with the dynamical stage described using the appropriate model (deep inelastic transfer and incomplete fusion at the Fermi energy domain and spectator-participant model at relativistic energies) and the de-excitation stage described with the statistical multifragmentation model. In all cases the isoscaling behavior was reproduced by a proper description of the dynamical stage and no unambiguous signals of the decrease of the symmetry energy coefficient were observed.
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"abstract": "Investigation of the effect of the dynamical stage of heavy-ion collisions\nindicates that the increasing width of the initial isospin distributions is\nreflected by a significant modification of the isoscaling slope for the final\nisotopic distributions after de-excitation. For narrow initial distributions,\nthe isoscaling slope assumes the limiting value of the two individual initial\nnuclei while for wide initial isotopic distributions the slope for hot\nfragments approaches the initial value. The isoscaling slopes for final cold\nfragments increase due to secondary emissions. The experimentally observed\nevolution of the isoscaling parameter in multifragmentation of hot\nquasiprojectiles at E$_{inc}$=50 AMeV, fragmentation of $^{86}$Kr projectiles\nat E$_{inc}$=25 AMeV and multifragmentation of target spectators at\nrelativistic energies was reproduced by a simulation with the dynamical stage\ndescribed using the appropriate model (deep inelastic transfer and incomplete\nfusion at the Fermi energy domain and spectator-participant model at\nrelativistic energies) and the de-excitation stage described with the\nstatistical multifragmentation model. In all cases the isoscaling behavior was\nreproduced by a proper description of the dynamical stage and no unambiguous\nsignals of the decrease of the symmetry energy coefficient were observed.",
"arxiv_id": "nucl-th/0607033",
"authors": [
"M. Veselsky"
],
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"doi": "10.1103/PhysRevC.74.054611",
"journal_ref": "Phys.Rev. C74 (2006) 054611",
"title": "Dynamical aspects of isotopic scaling",
"url": "https://arxiv.org/abs/nucl-th/0607033"
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