Phase transition dynamics for hot nuclei

Borderie, B.; Neindre, N. Le; Rivet, M. F.; Désesquelles, P.; Bonnet, É.; Bougault, R.; Chbihi, A.; Dell’Aquila, D.; Fable, Q.; Frankland, J.D.; Galichet, E.; Gruyer, D.; Guinet, D.; Commara, M. La; Lombardo, I.; Lopez, O.; Manduci, L.; Napolitani, P.; Pârlog, M.; Rosato, E.; Roy, R.; St-Onge, P.; Verde, G.; Vient, E.; Vigilante, M.; Wieleczko, J. P.

doi:10.1016/j.physletb.2018.05.040

Cited by 30 publications

(34 citation statements)

References 42 publications

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“…These data were shown elsewhere to be consistent with predictions based on the coexistence region of the nuclear phase diagram, not the critical point, i.e. spinodal decomposition [148,151,243,244], negative heat capacity [188,219], and, for the Au quasi-projectile data, bimodality of the order parameter [210]. Therefore for experimental data as for models, behaviour such as Fisher scaling of fragment yields, power laws, etc.…”

Section: Criticality and Correlation Lengthsupporting

confidence: 83%

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Liquid–Gas phase transition in nuclei

Borderie

Frankland

2019

Progress in Particle and Nuclear Physics

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Section: Criticality and Correlation Lengthsupporting

confidence: 83%

“…The colour/grey scale for CFs has a maximum value for 1.6 which corresponds to dark red/dark grey. From [244].…”

Section: Connecting Nuclear Matter To Open Systemsmentioning

confidence: 99%

Liquid–Gas phase transition in nuclei

Borderie

Frankland

2019

Progress in Particle and Nuclear Physics

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“…However, even though the exit channels with multiple fragments may suggest similarities between the deep-inelastic and the Fermi-energy domains, these regimes are related to rather different conditions. In fact, fragmentation processes at Fermi energy [20][21][22] are mainly determined by mechanical (isoscalar) instabilities at low density [23][24][25][26] and characterised by isospin drifts issued from a combination of density and isospin gradients [27,28], all this producing several fragments of comparable size in central collisions [29,30] or neck fragmentation [31][32][33][34][35][36][37][38][39] in peripheral collisions. The same density and excitation conditions are unreachable at lower energy.…”

Section: Introductionmentioning

confidence: 99%

Dynamic description of ternary and quaternary splits of heavy nuclear systems in the deep-inelastic regime

2019

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Colliding heavy nuclear systems in the deep-inelastic regime may undergo partitioning into multiple fragments when fusion can not be achieved. While multiple breakups are common at Fermi energy, they are rather exotic in the deep-inelastic regime, where density, excitation and, in general, transport conditions, are expected to be different. Abundant ternary and quaternary splits have been observed in recent experiments, for instance in symmetric semi-central and semi-peripheral collisions with heavy systems, like 197 Au + 197 Au at 15 MeV per nucleon. In these conditions, we undertook a microscopic description of the reaction dynamics. Relying on the full solution of the Boltzmann-Langevin equation implemented in the BLOB approach, we could follow in time the development of instabilities along deformation.

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“…In the Fermi energy regime (30-60 AMeV ), different reaction mechanisms are explored, according to the reaction centrality, in heavy ion collisions, ranging from (incomplete) fusion and deep-inelastic binary processes, up to fragmentation of the projectile-target overlap region (the neck region) and multifragment production. In very central collisions, the degree of stopping is such as to lead to the formation of a unique composite source [106,107,108,73] with a temperature in the range of T≈ 3-5 MeV, which eventually breaks up into many pieces, as a result of thermal effects and of the compressionexpansion dynamics. Indeed, as a quite interesting feature, this process is also accompanied by the development of a radial flow, which characterizes the kinematical properties of the reaction products [12,109].…”

Section: Reaction Dynamics At Medium Energy: Central Collisionsmentioning

confidence: 99%

“…[115]. A more refined analysis, based on event-by-event fragment correlations would be needed to disentangle among possible different fragmentation scenarios [107].…”

Section: Multifragment Emissionmentioning

confidence: 99%

Collision dynamics at medium and relativistic energies

Colonna

2020

Progress in Particle and Nuclear Physics

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Recent results connected to nuclear collision dynamics, from low up to relativistic energies, are reviewed. Heavy ion reactions offer the unique opportunity to probe the complex nuclear manybody dynamics and to explore, in laboratory experiments, transient states of nuclear matter under several conditions of density, temperature and charge asymmetry. From the theoretical point of view, transport models are an essential tool to undertake these investigations and make a connection betwen the nuclear effective interaction and sensitive observables of experimental interest. In this article, we mainly focus on the description of results of transport models for a selection of reaction mechanisms, also considering comparisons of predictions of different approaches. This analysis can help understanding the impact of the interplay between mean-field and correlation effects, as well as of in-medium effects, on reaction observables, which is an essential point also for extracting information on the nuclear Equation of State. A special emphasis will be given to the review of recent studies aimed at constraining the density behavior of the nuclear symmetry energy. For reactions at medium (Fermi) energies, we will describe light particle and fragment emission mechanisms, together with isospin transport effects. Collective effects characterizing nuclear collision dynamics, such as transverse and elliptic flows, will be discussed for relativistic heavy ion reactions, together with meson production and isotopic ratios.

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Phase transition dynamics for hot nuclei

Cited by 30 publications

References 42 publications

Liquid–Gas phase transition in nuclei

Liquid–Gas phase transition in nuclei

Dynamic description of ternary and quaternary splits of heavy nuclear systems in the deep-inelastic regime

Collision dynamics at medium and relativistic energies

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