Determination of neutron-skin thickness using configurational information entropy

Ma, Chun-Wang; Liu, Yipu; Wei, Hui-Ling; Pu, Jie; Cheng, Kaixuan; Wang, Yuting

doi:10.1007/s41365-022-00997-0

Cited by 17 publications

(4 citation statements)

References 42 publications

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“…4(b)]. In neutron-rich nuclei, the symmetry energy within the nucleus leads to an increased difference in density distribution between neutrons and protons, resulting in the formation of a neutron skin or neutron halo [39]. Recently, new methods have been developed for studying the neutron or proton skin and density distribution of the nuclei [40−42].…”

Section: 64mentioning

confidence: 99%

Isoscaling properties for neutron-rich fragments in highly asymmetric heavy ion collision systems*

Peng 彭,

Ma 马,

Qiao 乔

et al. 2024

Chinese Phys. C

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Historically, isoscaling has often been understood and applied under the grand canonical ensemble, assuming that the fragments are produced after the statistical equilibrium state is achieved. However, the influence of the symmetry energy may lead to differences in the neutron and density distribution in neutron-rich nuclei, potentially impacting the isoscaling parameters (usually denoted by $\alpha$ and $\beta$. We study the isoscaling properties for neutron-rich fragments produced in very asymmetric systems on inverse kinematics, namely $^{40,48}$Ca and $^{58,64}$Ni + $^{9}$Be at 140 MeV per nucleon. We evaluate the $\alpha$ and $\beta$ value and sort them as a function of the neutron excess $I \equiv N-Z$. The significant differences in $\alpha$ extracted from fragments within different range of $I$ emphasize the importance of understanding the isoscaling parameters dependence of fragments produced in different collision regions. Furthermore, the $|\beta(N)| / \alpha(Z)$ value for a specific fragment in small size and highly isospin asymmetry systems can serve as a probe to detect the variations of neutron density and proton density in different regions of the nucleus and point out the limitations of theoretical models in investigating these issues.

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Section: 64mentioning

confidence: 99%

Isoscaling properties for neutron-rich fragments in highly asymmetric heavy ion collision systems*

Peng 彭,

Ma 马,

Qiao 乔

et al. 2024

Chinese Phys. C

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“…For constraining the isospin asymmetric EOS, the usually used observables in nuclear structure studies are the neutron skin, electric dipole polarizability, isovector giant dipole resonance (IVGDR) and isoscalar giant quadrupole resonance (ISGQR), binding energy, charge radius and breathing mode energy. Among them, the neutron skin thickness ∆r np [131][132][133][134] in heavy nuclei was known as one of the most sensitive terrestrial probes of the symmetry energy around 2/3 of the saturation density, i.e., 2/3ρ 0 . In Ref.…”

Section: Eos and Symmetry Energy From Nuclear Structurementioning

confidence: 99%

Machine learning in nuclear physics at low and intermediate energies

He¹,

Li²,

Ma³

et al. 2023

Preprint

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“…Relativistic heavy ion collisions, especially isobar collisions, have been employed to study nuclear shape deformation [5][6][7][8][9][10], neutron skin thickness [11][12][13], the nucleon-nucleon correlation [14], and the α clustering structure inside the nucleus [12,[15][16][17][18][19][20][21]. Both the RHIC and LHC are planning to collect data for collisions, which is a medium-sized system [17,22] that can serve as a control group for the peripheral collisions of large nuclei and high multiplicity and events in small systems.…”

Section: Introductionmentioning

confidence: 99%

“…Nuclear lattice ef-fective field theory (NLEFT) also suggests that nucleons in oxygen cluster together like α particles. 12…”

Section: Introductionmentioning

confidence: 99%

Signals of α clusters in ¹⁶O+¹⁶O collisions at the LHC from relativistic hydrodynamic simulations*

Ding¹,

Pang²,

Zhang³

et al. 2023

Chinese Phys. C

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In relativistic heavy ion collisions, the fluctuations of initial entropy density convert to correlations of final state hadrons in momentum space, through collective expansion of the strongly interacting QCD matter. We ask by using a (3+1)D viscous hydrodynamic program CLVisc whether the nuclear structure, which provides initial state fluctuations as well as correlations, can affect the final state of heavy ion collisions, whether one can find signals of α cluster structure in Oxygen using the final state observables in 16O + 16O collisions at the CERN Large Hadron Collider (LHC). For the initial nucleon distributions in Oxygen nuclei, we have compared 3 different configurations, the tetrahedral structure with four-α clusters, the deformed Woods-Saxon distribution as well as a spherical symmetric Woods-Saxon distribution. Our results show that the charged multiplicity as a function of centrality and the elliptic flow at most central collisions using 4-α structure differs from Woods-Saxon and deformed Woods-Saxon distributions, which may help to identify the α clustering structures in Oxygen nuclei.

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Determination of neutron-skin thickness using configurational information entropy

Cited by 17 publications

References 42 publications

Isoscaling properties for neutron-rich fragments in highly asymmetric heavy ion collision systems*

Isoscaling properties for neutron-rich fragments in highly asymmetric heavy ion collision systems*

Machine learning in nuclear physics at low and intermediate energies

Signals of α clusters in ¹⁶O+¹⁶O collisions at the LHC from relativistic hydrodynamic simulations*

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Determination of neutron-skin thickness using configurational information entropy

Cited by 17 publications

References 42 publications

Isoscaling properties for neutron-rich fragments in highly asymmetric heavy ion collision systems*

Isoscaling properties for neutron-rich fragments in highly asymmetric heavy ion collision systems*

Machine learning in nuclear physics at low and intermediate energies

Signals of α clusters in 16O+16O collisions at the LHC from relativistic hydrodynamic simulations*

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Product

Resources

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Signals of α clusters in ¹⁶O+¹⁶O collisions at the LHC from relativistic hydrodynamic simulations*