Isotopic Scaling in Nuclear Reactions

Tsang, M. B.; Friedman, William A.; Gelbke, C. K.; Lynch, W. G.; Verde, G.; Xu, H. S.

doi:10.1103/physrevlett.86.5023

Cited by 337 publications

(462 citation statements)

References 23 publications

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“…In recent years isospin effects on fragment production have been discussed in terms of an isoscaling behaviour, revealed first in multifragmentation data [74,170]. It was experimentally observed that comparing two different reactions, one neutron rich (label 2) and one neutron poor (label 1), the ratio between the yields of a given N, Z isotope R 21 = Y 2 (N, Z)/Y 1 (N, Z) follows the relation:…”

Section: Isoscaling Analysismentioning

confidence: 99%

“…This effect is certainly present but it appears overestimated within the grand canonical picture. In the same scheme the isoscaling parameters, being related to the difference of neutron and proton chemical potentials, can provide an evaluation of the symmetry term of the EOS in dilute matter [170,120]. Very low values are deduced, with a large uncertainty due to the determination of the temperature of the equilibrated source.…”

Section: Isospin Distillation and Isoscalingmentioning

confidence: 99%

“…of MSU at the beam energy E beam = 50AMeV , [74,170]. The Isospin Distillation in central collisions was observed and analysed using an approach aimed to reduce as much as possible the effects of sequential decays by normalizing the isotopic yield from different Sn + Sn systems to that of the more charge-symmetric case.…”

Section: Isospin Distillation and Isoscalingmentioning

confidence: 99%

“…In particular we report on a study of the 50AMeV collisions of the systems 124 Sn+ 124 Sn 112 Sn+ 112 Sn and 124 Sn + 112 Sn, [55], where data are available from NSCL − MSU exps. for fragment production and isospin diffusion, [74,170,198].…”

Section: Theoretical Interpretation: Overviewmentioning

confidence: 99%

“…obey an Isoscaling law: its logarithm is a linear function on the number of neutrons and protons, with the slope given by the the isoscaling parameter α and β respectively, [74,170].…”

Section: Isospin Distillation and Isoscalingmentioning

confidence: 99%

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Reaction dynamics with exotic nuclei

et al. 2005

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Iste magistrorum locus est simul et puerorum, mittunt quando volunt hic res quas perdere nolunt [1]. AbstractWe review the new possibilities offered by the reaction dynamics of asymmetric heavy ion collisions, using stable and unstable beams. We show that it represents a rather unique tool to probe regions of highly Asymmetric Nuclear Matter (AN M ) in compressed as well as dilute phases, and to test the in-medium isovector interaction for high momentum nucleons. The focus is on a detailed study of the symmetry term of the nuclear Equation of State (EOS) in regions far away from saturation conditions but always under laboratory controlled conditions. Thermodynamic properties of AN M are surveyed starting from nonrelativistic and relativistic effective interactions. In the relativistic case the role of the isovector scalar δ-meson is stressed. The qualitative new features of the liquid-gas phase transition, "diffusive" instability and isospin distillation, are discussed. The results of ab-initio simulations of n-rich, n-poor, heavy ion collisions, using stochastic isospin dependent transport equations, are analysed as a function of beam energy and centrality. The isospin dynamics plays an important role in all steps of the reaction, from prompt nucleon emissions to the final fragments. The isospin diffusion is also of large interest, due to the interplay of asymmetry and density gradients. In relativistic collisions, the possibility of a direct study of the covariant structure of the effective nucleon interaction is shown. Results are discussed for particle production, collective flows and iso-transparency.Perspectives of further developments of the field, in theory as well as in experiment, are presented.

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Section: Isoscaling Analysismentioning

confidence: 99%

Section: Isospin Distillation and Isoscalingmentioning

confidence: 99%

Section: Isospin Distillation and Isoscalingmentioning

confidence: 99%

Section: Theoretical Interpretation: Overviewmentioning

confidence: 99%

“…obey an Isoscaling law: its logarithm is a linear function on the number of neutrons and protons, with the slope given by the the isoscaling parameter α and β respectively, [74,170].…”

Section: Isospin Distillation and Isoscalingmentioning

confidence: 99%

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Reaction dynamics with exotic nuclei

et al. 2005

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Infinite nuclear matter characteristics of the finite nuclei within relativistic mean‐field formalism

2019

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We investigate the mass dependence of the nuclear structure and the effective symmetry energy for the Kr and Ba nuclei. The axially deformed self-consistent relativistic mean field with the nonlinear NL3* parameter set is used in the analysis. The coherent density fluctuation model is adopted to formulate the nuclear matter observables such as symmetry energy, neutron pressure, and symmetry energy curvature of finite nuclei as a function of the radius. We found a notable signature of the shell/subshell closure at N = 50 and 82 for the isotopic chains of Kr and Ba nuclei, respectively.KEYWORDS coherent density fluctuation model -neutron separation energy -relativistic mean field -shell closure -symmetry energy 1

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

Tsang¹,

Bougault²,

Charity³

et al. 2006

Dynamics and Thermodynamics With Nuclear Degrees of Freedom

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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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Isotopic Scaling in Nuclear Reactions

Cited by 337 publications

References 23 publications

Reaction dynamics with exotic nuclei

Reaction dynamics with exotic nuclei

Infinite nuclear matter characteristics of the finite nuclei within relativistic mean‐field formalism

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

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