Isotopic compositions and scalings

Colonna, M.; Tsang, M. B.

doi:10.1007/978-3-540-46496-9_14

Cited by 4 publications

(6 citation statements)

References 54 publications

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“…However, for lower C sym values, the α(final) are larger than α(primary). As discussed in [42], this trend is different from those observed in dynamical calculations. A detailed understanding of the effects of sequential decays on the isoscaling parameters α, the temperature T , and the proton fraction Z i /A i [45] is necessary before symmetry energy information can be extracted by applying Eq.…”

Section: Isoscalingcontrasting

confidence: 68%

“…When isoscaling was first observed in experimental data [21,38], it was demonstrated through statistical model calculations that isoscaling could be preserved through sequential decays [38,39]. More importantly, statistical models relate the isoscaling phenomenon to the symmetry energy [38,39,40,41], which is of fundamental interest to general nuclear properties as well as astrophysical interests [42].…”

Section: Isoscalingmentioning

confidence: 98%

“…More importantly, statistical models relate the isoscaling phenomenon to the symmetry energy [38,39,40,41], which is of fundamental interest to general nuclear properties as well as astrophysical interests [42].…”

Section: Isoscalingmentioning

confidence: 99%

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Comparisons of statistical multifragmentation and evaporation models for heavy-ion collisions

et al. 2006

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The results from ten statistical multifragmentation models have been compared with each other using selected experimental observables. Even though details in any single observable may differ, the general trends among models are similar. Thus these models and similar ones are very good in providing important physics insights especially for general properties of the primary fragments and the multifragmentation process. Mean values and ratios of observables are also less sensitive to individual differences in the models. In addition to multifragmentation models, we have compared results from five commonly used evaporation codes. The fluctuations in isotope yield ratios are found to be a good indicator to evaluate the sequential decay implementation in the code. The systems and the observables studied here can be used as benchmarks for the development of statistical multifragmentation models and evaporation codes.

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Section: Isoscalingcontrasting

confidence: 68%

Section: Isoscalingmentioning

confidence: 98%

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Comparisons of statistical multifragmentation and evaporation models for heavy-ion collisions

et al. 2006

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“…This relation is a simple fit to several mean field calculations, see also [15]. As discussed by Li et al [16] and by Colonna and Tsang [17] in the chapter on isospin properties of this book, the power γ can be deduced from HI data involving observables such as isoscaling and isospin diffusion. Finally we mention a recent review article which discusses the symmetry energy in astrophysics [18].…”

Section: The Parity Radius Experiments and The Low Density Eosmentioning

confidence: 84%

Links between heavy ion and astrophysics

Horowitz

2006

Eur. Phys. J. A

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Heavy ion experiments provide important data to test astrophysical models. The high density equation of state can be probed in HI collisions and applied to the hot protoneutron star formed in core collapse supernovae. The Parity Radius Experiment (PREX) aims to accurately measure the neutron radius of 208 Pb with parity violating electron scattering. This determines the pressure of neutron rich matter and the density dependence of the symmetry energy. Competition between nuclear attraction and coulomb repulsion can form exotic shapes called nuclear pasta in neutron star crusts and supernovae. This competition can be probed with multifragmentation HI reactions. We use large scale semiclassical simulations to study nonuniform neutron rich matter in supernovae. We find that the coulomb interactions in astrophysical systems suppress density fluctuations. As a result, there is no first order liquid vapor phase transition. Finally, the virial expansion for low density matter shows that the nuclear vapor phase is complex with significant concentrations of alpha particles and other light nuclei in addition to free nucleons.

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“…The drop to low density also triggers the occurrence of isospin effects [26,36,37,38,39] both in the jet formation and in the neck mechanism. The average isospin content < N/Z > of A 1 , A 2 and of the lighter fragments (A 3 ...) is tracked in Fig.…”

Section: Resultsmentioning

confidence: 99%

Nuclear jets in heavy-ion collisions

Napolitani

Colonna

2019

Physics Letters B

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Head-on collisions between nuclei of different size at Fermi energies may give rise to extremely deformed dynamical regimes and patterns. Those latter, may suddenly turn into a stream of nuclear clusters, resembling collimated jets. Because the underlying instabilities are inadequately described by usual modelling approaches based on equilibrium approximations, this mechanism resulted rather unnoticed, even though it should be frequently registered in experiments. We employ the Boltzmann-Langevin equation to specifically address out-of-equilibrium conditions and handle dynamical fluctuations. An interesting interplay between surface and volume instabilities is discussed for the first time. Stable and rather regular patterns of streaming clusters arise from these conditions. Counterintuitively, we find that these clustered structures are not triggered by cohesive forces and they recall the granular flow of a stream of dry sand.

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Isotopic compositions and scalings

Cited by 4 publications

References 54 publications

Comparisons of statistical multifragmentation and evaporation models for heavy-ion collisions

Comparisons of statistical multifragmentation and evaporation models for heavy-ion collisions

Links between heavy ion and astrophysics

Nuclear jets in heavy-ion collisions

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