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Journal articles on the topic 'Isospin diffusion'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

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1

Mallik, S., F. Gulminelli, and D. Gruyer. "Constraining the density dependence of the symmetry energy: the isospin transport ratio revisited." Journal of Physics G: Nuclear and Particle Physics 49, no. 1 (2021): 015102. http://dx.doi.org/10.1088/1361-6471/ac3473.

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Abstract The isospin diffusion of the quasi-projectile formed in the Ni 64 , 58 on Ni 64 , 58 reactions in the Fermi energy domain is investigated in the framework of the Boltzmann–Uehling–Uhlenbeck transport model. The well known isospin transport ratio observable is revisited, with the aim of insuring an optimal comparison between experimental data and theoretical calculations and reducing the present uncertainties in the extraction of empirical equation of state parameters. We show that isospin transport ratios are sensitive to all the low order isovector parameters (E sym, L sym and K sym,

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2

TSANG, M. B., YINGXUN ZHANG, P. DANIELEWICZ, et al. "CONSTRAINTS ON THE DENSITY DEPENDENCE OF THE SYMMETRY ENERGY." International Journal of Modern Physics E 19, no. 08n09 (2010): 1631–38. http://dx.doi.org/10.1142/s0218301310016041.

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Collisions involving 112 Sn and 124 Sn nuclei have been calculated with the ImQMD transport model in order to place constraints on the density dependences of the nuclear symmetry energy. Consistent constraints on the symmetry energy at sub-saturation density have been obtained by comparing these transport calculations to measurements of isospin diffusion and to the ratios of neutron and proton spectra. New isospin diffusion results from E/A = 35 MeV are also presented.

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3

Tsang, Betty. "Isospin diffusion in heavy ion collisions." Nuclear Physics A 734 (April 2004): 605–8. http://dx.doi.org/10.1016/j.nuclphysa.2004.01.112.

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4

Tsang, Betty, and Lijun Shi. "Isospin diffusion in heavy ion collisions." Nuclear Physics A 738 (June 2004): 115–21. http://dx.doi.org/10.1016/j.nuclphysa.2004.04.019.

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5

GALICHET, E., M. F. RIVET, B. BORDERIE, et al. "THE ISOSPIN DIFFUSION IN 58Ni-INDUCED REACTIONS AT INTERMEDIATE ENERGIES." International Journal of Modern Physics E 19, no. 08n09 (2010): 1534–44. http://dx.doi.org/10.1142/s021830131001593x.

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Isospin diffusion is probed as a function of the dissipated energy by studying two systems 58 Ni +58 Ni and 58 Ni +197 Au , over the incident energy range 52-74A MeV. Experimental data are compared with the results of a microscopic transport model with two different parameterizations of the symmetry energy term. A better overall agreement between data and simulations is obtained when using a symmetry term with a potential part linearly increasing with nuclear density. The isospin equilibration time at 52 A MeV is estimated to 130 ± 10 fm/c.

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6

Ciampi, C., S. Piantelli, G. Casini, et al. "Nuclear symmetry energy at work in heavy ion reactions: new results from the INDRA-FAZIA apparatus." Journal of Physics: Conference Series 2586, no. 1 (2023): 012039. http://dx.doi.org/10.1088/1742-6596/2586/1/012039.

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Abstract The recently coupled INDRA-FAZIA apparatus offers unique opportunities to investigate heavy ion collisions at Fermi energies by combining the optimal identification capabilities of FAZIA and the large angular coverage of INDRA. We present a selection of the results of the analysis of the first experimental campaign performed with INDRA-FAZIA, in which the four reactions 58,64Ni+58,64Ni have been studied at two different beam energies (32 and 52 MeV/nucleon) in the intermediate energy regime. The present work is focused on the isospin diffusion effects in semiperipheral and peripheral

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7

ZHANG, YINGXUN, M. B. TSANG, ZHUXIA LI, P. DANIELEWICZ, W. G. LYNCH, and XIAOHUA LU. "PROBING THE DENSITY DEPENDENCE OF SYMMETRY ENERGY AT SUBSATURATION DENSITY WITH HICs." International Journal of Modern Physics E 19, no. 08n09 (2010): 1639–46. http://dx.doi.org/10.1142/s0218301310016053.

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The reaction mechanism of the central collisions and peripheral collisions for 112,124 Sn + 112,124 Sn at E/A = 50 MeV is investigated within the framework of the Improved Quantum Molecular Dynamics model. The results show that multifragmentation process is an important mechanism at this energy region, and the influence of the cluster emission on the double n / p ratios and the isospin transport ratio is important. Furthermore, three observables, double n / p ratios, isospin diffusion and the rapidity distribution of the ratio R7 for 112,124 Sn +112,124 Sn at E/A = 50 MeV are analyzed with the

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8

CHEN, LIE-WEN, CHE MING KO, and BAO-AN LI. "CONSTRAINING THE SKYRME EFFECTIVE INTERACTIONS AND THE NEUTRON SKIN THICKNESS OF NUCLEI USING ISOSPIN DIFFUSION DATA FROM HEAVY ION COLLISIONS." International Journal of Modern Physics E 15, no. 07 (2006): 1385–95. http://dx.doi.org/10.1142/s0218301306004946.

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Recent analysis of the isospin diffusion data from heavy-ion collisions based on an isospin- and momentum-dependent transport model with in-medium nucleon-nucleon cross sections has led to the extraction of a value of L = 88 ± 25 MeV for the slope of the nuclear symmetry energy at saturation density. This imposes stringent constraints on both the parameters in the Skyrme effective interactions and the neutron skin thickness of heavy nuclei. Among the 21 sets of Skyrme interactions commonly used in nuclear structure studies, the 4 sets SIV, SV, Gσ, and Rσ are found to give L values that are con

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9

SCHMIDT, K. E., A. SARSA, and S. FANTONI. "A CONSTRAINED PATH MONTE CARLO METHOD FOR NUCLEON SYSTEMS." International Journal of Modern Physics B 15, no. 10n11 (2001): 1510–18. http://dx.doi.org/10.1142/s0217979201005994.

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By combining diffusion Monte Carlo for the spatial degrees of freedom and auxiliary field Monte Carlo to separate the spin-isospin operators, we can solve for the ground state of many-nucleon systems. We use a path constraint to control the fermion sign problem and apply the method to neutron systems interacting with the Argonne v′8 two nucleon potential and the Urbana IX three-nucleon potential. We compare our results with fermion hypernetted chain calculations.

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10

XU, JUN, CHE MING KO, LIE-WEN CHEN, BAO-AN LI, and HONG-RU MA. "TRANSITION DENSITY AND PRESSURE AT THE INNER EDGE OF NEUTRON STAR CRUSTS." International Journal of Modern Physics E 19, no. 08n09 (2010): 1705–11. http://dx.doi.org/10.1142/s0218301310016120.

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Using the nuclear symmetry energy that has been recently constrained by the isospin diffusion data in intermediate-energy heavy ion collisions, we have studied the transition density and pressure at the inner edge of neutron star crusts, and they are found to be 0.040 fm -3 ≤ ρt ≤ 0.065 fm -3 and 0.01 MeV / fm 3 ≤ Pt ≤ 0.26 MeV / fm 3, respectively, in both the dynamical and thermodynamical approaches. We have also found that the widely used parabolic approximation to the equation of state of asymmetric nuclear matter gives significantly higher values of core-crust transition density and press

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11

KASMUDIN and A. SULAKSONO. "IMPACTS OF PARAMETERS ADJUSTMENT OF RELATIVISTIC MEAN FIELD MODEL ON NEUTRON STAR PROPERTIES." International Journal of Modern Physics E 20, no. 05 (2011): 1271–85. http://dx.doi.org/10.1142/s0218301311018320.

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Analysis of the parameters adjustment effects in isovector as well as in isoscalar sectors of effective field based relativistic mean field (E-RMF) model in the symmetric nuclear matter and neutron-rich matter properties has been performed. The impacts of the adjustment on slowly rotating neutron star are systematically investigated. It is found that the mass–radius relation obtained from adjusted parameter set G2** is compatible not only with neutron stars masses from 4U 0614+09 and 4U 1636-536, but also with the ones from thermal radiation measurement in RX J1856 and with the radius range of

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12

Verde, G., Z. Y. Sun, M. B. Tsang, et al. "Probing the equation of state of asymmetric nuclear matter with isospin diffusion and stopping in heavy-ion collisions." Journal of Physics: Conference Series 312, no. 8 (2011): 082044. http://dx.doi.org/10.1088/1742-6596/312/8/082044.

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13

Rust, Felix. "In-Medium Effects in the Holographic Quark-Gluon Plasma." Advances in High Energy Physics 2010 (2010): 1–141. http://dx.doi.org/10.1155/2010/564624.

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We use the gauge/gravity duality to investigate various properties of strongly coupled gauge theories, which we interpret as models for the quark-gluon plasma (QGP). In particular, we use variants of the D3/D7 setup as an implementation of the top-down approach of connecting string theory with phenomenologically relevant gauge theories. We focus on the effects of finite temperature and finite density on fundamental matter in the holographic quark-gluon plasma, which we model as theN=2hypermultiplet in addition to theN=4gauge multiplet of supersymmetric Yang-Mills theory. We use a setup in whic

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14

Liu, T. X., W. G. Lynch, M. B. Tsang, et al. "Isospin diffusion observables in heavy-ion reactions." Physical Review C 76, no. 3 (2007). http://dx.doi.org/10.1103/physrevc.76.034603.

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15

Sun, Z. Y., M. B. Tsang, W. G. Lynch, et al. "Isospin diffusion and equilibration forSn+Sncollisions atE/A=35MeV." Physical Review C 82, no. 5 (2010). http://dx.doi.org/10.1103/physrevc.82.051603.

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16

Erdmenger, Johanna, Matthias Kaminski, and Felix Rust. "Isospin diffusion in thermal AdS/CFT correspondence with flavor." Physical Review D 76, no. 4 (2007). http://dx.doi.org/10.1103/physrevd.76.046001.

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17

Camaiani, A., G. Casini, S. Piantelli, et al. "Isospin diffusion measurement from the direct detection of a quasiprojectile remnant." Physical Review C 103, no. 1 (2021). http://dx.doi.org/10.1103/physrevc.103.014605.

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18

Galichet, E., M. F. Rivet, B. Borderie, et al. "Isospin diffusion inNi58-induced reactions at intermediate energies. I. Experimental results." Physical Review C 79, no. 6 (2009). http://dx.doi.org/10.1103/physrevc.79.064614.

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19

Galichet, E., M. Colonna, B. Borderie, and M. F. Rivet. "Isospin diffusion inNi58-induced reactions at intermediate energies. II. Dynamical simulations." Physical Review C 79, no. 6 (2009). http://dx.doi.org/10.1103/physrevc.79.064615.

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20

Camaiani, A., G. Casini, S. Piantelli, et al. "Isospin diffusion measurement from the direct detection of a quasiprojectile remnant." Physical Review C 103, no. 1 (2021). http://dx.doi.org/10.1103/physrevc.103.014605.

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21

Tsang, M. B., T. X. Liu, L. Shi, et al. "Isospin Diffusion and the Nuclear Symmetry Energy in Heavy Ion Reactions." Physical Review Letters 92, no. 6 (2004). http://dx.doi.org/10.1103/physrevlett.92.062701.

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22

Bu, Yanyan, Xiyang Sun, and Biye Zhang. "Holographic Schwinger-Keldysh field theory of SU(2) diffusion." Journal of High Energy Physics 2022, no. 8 (2022). http://dx.doi.org/10.1007/jhep08(2022)223.

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Abstract We construct effective field theory for SU(2) isospin charge diffusion, based on holographic Schwinger-Keldysh contour [1]. The holographic model consists of a probe SU(2) gauge field in a doubled Schwarzschild-AdS5 geometry. Accurate to first order in derivative expansion, we analytically compute the effective action up to quartic order in dynamical variables. The effective theory contains both non-Gaussianity for noises and nonlinear interactions between noises and dynamical variables. Moreover, the effective theory captures both thermal and quantum fluctuations, which perfectly sat

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23

Chen, Lie-Wen, Che Ming Ko, and Bao-An Li. "Determination of the Stiffness of the Nuclear Symmetry Energy from Isospin Diffusion." Physical Review Letters 94, no. 3 (2005). http://dx.doi.org/10.1103/physrevlett.94.032701.

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24

Steiner, Andrew W., and Bao-An Li. "Isospin diffusion in heavy-ion collisions and the neutron skin thickness of lead." Physical Review C 72, no. 4 (2005). http://dx.doi.org/10.1103/physrevc.72.041601.

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25

Gao, Zepeng, Yinu Zhang, Long Zhu, et al. "Role of the isospin diffusion on the cluster transfer in C12,14+Bi209 reactions." Physical Review C 109, no. 4 (2024). http://dx.doi.org/10.1103/physrevc.109.l041605.

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26

Ciampi, C., J. D. Frankland, D. Gruyer, et al. "Model-independent measurement of isospin diffusion in Ni-Ni systems at intermediate energy." Physical Review C 111, no. 4 (2025). https://doi.org/10.1103/physrevc.111.044601.

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27

Fotakis, Jan A., Jakob E. Lohr, and Carsten Greiner. "Exact relations between the conductivities and their connection to the chemical composition of QCD matter." Physical Review C 110, no. 2 (2024). http://dx.doi.org/10.1103/physrevc.110.025204.

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We present exact relations between the diffusion coefficients or conductivities, κqq′/T=σqq′, of strongly interacting matter. We show that once the diagonal entries are known in two different charge representations, the off-diagonal coefficients are functions of the diagonal entries once isospin symmetry applies. As an important example, we infer the conductivities on the basis of available calculations from lattice quantum chromodynamics and argue that these computations suffer under the approximations made to achieve them. Further, we argue that the representation of the conductivities with

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28

Piantelli, S., S. Valdré, S. Barlini, et al. "Isospin diffusion in binary collisions of S32+Ca40,48 and S32+Ti48 at 17.7 MeV/nucleon." Physical Review C 96, no. 3 (2017). http://dx.doi.org/10.1103/physrevc.96.034622.

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29

Niu, Fei, Peng-Hui Chen, Ya-Fei Guo, Chun-Wang Ma, and Zhao-Qing Feng. "Effect of isospin diffusion on the production of neutron-rich nuclei in multinucleon transfer reactions." Physical Review C 97, no. 3 (2018). http://dx.doi.org/10.1103/physrevc.97.034609.

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30

Fable, Q., L. Baldesi, S. Barlini, et al. "Isospin diffusion from Ca40,48+Ca40,48 experimental data at Fermi energies: Direct comparisons with transport model calculations." Physical Review C 109, no. 6 (2024). http://dx.doi.org/10.1103/physrevc.109.064605.

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31

Ciampi, C., S. Piantelli, G. Casini, et al. "First results from the INDRA-FAZIA apparatus on isospin diffusion in Ni58,64+Ni58,64 systems at Fermi energies." Physical Review C 106, no. 2 (2022). http://dx.doi.org/10.1103/physrevc.106.024603.

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32

Fore, Bryce, Jane Kim, Morten Hjorth-Jensen, and Alessandro Lovato. "Investigating the crust of neutron stars with neural-network quantum states." Communications Physics 8, no. 1 (2025). https://doi.org/10.1038/s42005-025-02015-2.

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Abstract An accurate description of low-density nuclear matter is crucial for explaining the physics of neutron star crusts. In the density range between approximately 0.01 fm−3 and 0.1 fm−3, matter transitions from neutron-rich nuclei to various higher-density pasta shapes, before ultimately reaching a uniform liquid. In this work, we introduce a variational Monte Carlo method based on a neural Pfaffian-Jastrow quantum state, which allows us to model the transition from the liquid phase to neutron-rich nuclei microscopically. At low densities, nuclear clusters dynamically emerge from the micr

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