Low Density In-Medium Effects on Light Clusters from Heavy-Ion Data

Pais, Helena; Bougault, R.; Gulminelli, F.; Providência, Constança; Bonnet, É.; Borderie, B.; Chbihi, A.; Frankland, J.D.; Galichet, E.; Gruyer, D.; Henri, M.; Neindre, N. Le; Lopez, O.; Manduci, L.; Pârlog, M.; Verde, G.

doi:10.1103/physrevlett.125.012701

Cited by 30 publications

(36 citation statements)

References 20 publications

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“…It is important to mention here that huge effort are devoted nowadays to quantify the in-medium modification of light clusters binding energies since it has important implications on the EoS [14,[42][43][44].…”

Section: B In-medium Ac = 3 Clusters Characteristicsmentioning

confidence: 99%

In-medium effects in central heavy ion collisions at intermediate energies

Henri¹,

Lopez²,

Durand³

et al. 2020

Phys. Rev. C

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Energy dissipation and cluster production in central nuclear collisions in the Fermi energy range have been investigated using the large INDRA database. A study of the in-medium nucleon-nucleon cross section, σ * N N , has been performed by comparing the results of a model with the measured isotropy ratio of the kinetic energy distributions of the detected protons. This analysis has been done for a large variety of systems at various incident energies from 20 to 100 MeV/nucleon and confirms nicely previous results with enhanced statistics in a full Monte Carlo treatment. Most importantly, it is found that σ * N N is drastically reduced as compared to the vacuum values, due partly to Pauli blocking but also to in-medium effects for which mean values and uncertainties are given. Concerning the cluster production, a coalescence model has been developed to study the parallel and perpendicular velocity distributions of the light clusters (A ≤ 4). For the AC = 3 (3 H, 3 He), it is found that the mean internal kinetic energy of the nucleons in the cluster is reduced as compared to the vacuum value. These two results shows that any comparison between experimental and theoretical predictions in heavy-ions induced reactions around and above Fermi energy must take into account these in-medium effects.

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Section: B In-medium Ac = 3 Clusters Characteristicsmentioning

confidence: 99%

In-medium effects in central heavy ion collisions at intermediate energies

Henri¹,

Lopez²,

Durand³

et al. 2020

Phys. Rev. C

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“…Related to this, the formation of α-particle clustering from excited expanding self-conjugate nuclei was also revealed in two different constrained self-consistent mean field calculations [8][9][10]. On the experimental side, cluster formation and their in-medium effects have been probed by heavy-ion experiments [11][12][13][14] and alphaclustering was observed in excited expanding self-conjugate nuclei [15][16][17]. The aim of the present paper is to give a benchmark for the temperature and density needed to observe alpha-clustering in self-conjugate nuclei.…”

Section: Introductionmentioning

confidence: 78%

Temperature and Density Conditions for Alpha Clustering in Excited Self-Conjugate Nuclei

et al. 2021

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Starting from experimental studies on alpha-clustering in excited self-conjugate nuclei (from 16O to 28Si), temperature and density conditions for such a clustering are determined. Measured temperatures have been found in the range of 5.5–6.0 MeV, whereas density values of 0.3–0.4 times the saturation density are deduced, i.e., 0.046 to 0.062 fm−3. Such a density domain is also predicted by constrained self-consistent mean field calculations. These results constitute a benchmark for alpha clustering from self-conjugate nuclei in relation to descriptions of stellar evolution and supernovae.

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“…2 H, 3 H, 3 He and 4 He abundance ratios are presented in Figure 1 for Ni + Ni and Ca + Ca systems and in Figure 2 for Au + Au. In Figure 1, the bombarding energy data points are ranging from 32 to 1930 A MeV.…”

Section: Cluster Production: Abundance Ratiosmentioning

confidence: 99%

“…The aim of the present article is to provide experimental data on cluster production to which the model calculations can be directly compared in order to improve our understanding of the Nuclear Equation of State. It is also useful to recall that light nuclear clusters play an important role in the warm and low-density nuclear matter that can be found in core-collapse supernovae and neutron star mergers [3], and therefore, their production mechanism is also important for astrophysics.…”

Section: Introductionmentioning

confidence: 99%

Light Cluster Production in Central Symmetric Heavy-Ion Reactions from Fermi to Gev Energies

et al. 2021

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Correlations and clustering are of great importance in the study of the Nuclear Equation of State. Information on these items/aspects can be obtained using heavy-ion reactions which are described by dynamical theories. We propose a dataset that will be useful for improving the description of light cluster production in transport model approaches. The dataset combines published and new data and is presented in a form that allows direct comparison of the experiment with theoretical predictions. The dataset is ranging in bombarding energy from 32 to 1930 A MeV. In constructing this dataset, we put in evidence the existence of a change in the light cluster production mechanism that corresponds to a peak in deuteron production.

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Low Density In-Medium Effects on Light Clusters from Heavy-Ion Data

Cited by 30 publications

References 20 publications

In-medium effects in central heavy ion collisions at intermediate energies

In-medium effects in central heavy ion collisions at intermediate energies

Temperature and Density Conditions for Alpha Clustering in Excited Self-Conjugate Nuclei

Light Cluster Production in Central Symmetric Heavy-Ion Reactions from Fermi to Gev Energies

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