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Particle production in ultrarelativistic heavy ion collisions depends on the details of the nucleon density distributions in the colliding nuclei. We demonstrate that the charged hadron multiplicity distributions in isobaric collisions at…

Nuclear Theory · Physics 2020-11-25 Hanlin Li , Hao-jie Xu , Ying Zhou , Xiaobao Wang , Jie Zhao , Lie-Wen Chen , Fuqiang Wang

In this work, a refined Bayesian neural network (BNN) based approach with six inputs including the proton number, mass number, and engineered features associated with the pairing effect, shell effect, isospin effect, and ``abnormal" shape…

Nuclear Theory · Physics 2023-02-15 Xiao-Xu Dong , Rong An , Jun-Xu Lu , Li-Sheng Geng

A new method is proposed to deduce the neutron radii of neutron-rich nuclei. This method requires measuring the reaction cross sections of both the neutron-rich nucleus and its stable isotope at the same energy on a proton target. Using…

Nuclear Theory · Physics 2020-04-22 I. A. M. Abdul-Magead , Eman Hamza , Badawy Abu-Ibrahim

Nuclei with large neutron-to-proton ratios have neutron skins, which manifest themselves in an excess of neutrons at distances greater than the radius of the proton distribution. In addition, some drip-line nuclei develop very extended halo…

Nuclear Theory · Physics 2009-10-31 S. Mizutori , J. Dobaczewski , G. A. Lalazissis , W. Nazarewicz , P. -G. Reinhard

Non-uniform structures of the nucleon matter are expected at subnuclear densities and above the nuclear density: they are called nuclear pastas and kaon pastas, respectively. We numerically study these phases by means of the density…

Multi-neutron systems are crucial to understanding the physics of neutron-rich nuclei and neutron stars. Neutron drops, neutrons confined in an external field, are investigated systematically in both non-relativistic and relativistic…

Nuclear Theory · Physics 2016-10-19 P. W. Zhao , S. Gandolfi

In neutron star crust, non-uniform structure of nuclear matter is expected, which is called the "pasta" structure. From the recent studies of giant flares in magnetars, these structures might be related to some observables and physical…

Nuclear Theory · Physics 2014-01-31 Minoru Okamoto , Toshiki Maruyama , Kazuhiro Yabana , Toshitaka Tatsumi

Background: Neutron stars are astronomical systems with nucleons submitted to extreme conditions. Due to the longer range coulomb repulsion between protons, the system has structural inhomogeneities. Several interactions tailored to…

Nuclear Theory · Physics 2018-01-24 Pablo Alcain , Claudio Dorso

Electron scattering on unstable nuclei is planned in future facilities of the GSI and RIKEN upgrades. Motivated by this fact, we study theoretical predictions for elastic electron scattering in the N=82, N=50, and N=14 isotonic chains from…

Nuclear Theory · Physics 2013-01-10 X. Roca-Maza , M. Centelles , F. Salvat , X. Viñas

Nuclei at both the neutron- and proton-drip lines are studied. In the cluster-core model, the halo-structure of all the observed and proposed cases of neutron- or proton-halos is investigated in terms of simple potential energy surfaces…

Nuclear Theory · Physics 2011-11-09 Raj K. Gupta , Sushil Kumar , M. Balasubramaniam , G. Munzenberg , Werner Scheid

Background: The inner crust of a neutron star is believed to consist of Coulomb-frustrated complex structures known as "nuclear pasta" that display interesting and unique low-energy dynamics. Purpose: To elucidate the structure and…

Nuclear Theory · Physics 2015-06-12 K. H. O. Hasnaoui , J. Piekarewicz

The absolute differential cross sections for small-angle proton elastic scattering off the nuclei $^{12,14-17}$C have been measured in inverse kinematics at energies near 700 MeV/u at GSI Darmstadt. The hydrogen-filled ionization chamber…

Equilibrium phase diagrams for neutron star matter at subnuclear densities are obtained at zero temperature. Spherical, rod-like and slab-like nuclei as well as spherical and rod-like nuclear bubbles are taken into account by using a…

Astrophysics · Physics 2009-10-31 Gentaro Watanabe , Kei Iida , Katsuhiko Sato

Background: Precise measurements of atomic transitions affected by electron-nucleus hyperfine interactions offer sensitivity to explore basic properties of the atomic nucleus and study fundamental symmetries, including the search for new…

Nuclear Theory · Physics 2023-06-06 Paul-Gerhard Reinhard , Witold Nazarewicz

The properties and composition of the outer crust of nonaccreting cold neutron stars are studied by applying the model of Baym, Pethick, and Sutherland, which was extended by including higher order corrections of the atomic binding,…

Astrophysics · Physics 2008-11-26 Matthias Hempel , Jurgen Schaffner-Bielich

The roles of isospin asymmetry in nuclei and neutron stars are investigated using a range of potential and field-theoretical models of nucleonic matter. The parameters of these models are fixed by fitting the properties of homogeneous bulk…

Nuclear Theory · Physics 2009-11-11 Andrew W. Steiner , Madappa Prakash , James M. Lattimer , Paul J. Ellis

We discuss the possible implication of the recent predictions of two new properties of high momentum distribution of nucleons in asymmetric nuclei for neutron star dynamics. The first property is about the approximate scaling relation…

Nuclear Theory · Physics 2015-06-18 Misak M. Sargsian

To improve the constraints of symmetry energy at subsaturation density, measuring and accumulating more neutron skin data for neutron rich unstable nuclei is naturally required. Aiming to probe the neutron skin of unstable nuclei by using…

Nuclear Theory · Physics 2023-04-25 Junping Yang , Xiang Chen , Ying Cui , Zhuxia Li , Yingxun Zhang

A method is presented to extract the neutron-skin thickness of atomic nuclei from the second and fourth moments of the electric charge distribution. We show that the value of the proton fourth moment must be independently known in order to…

Nuclear Theory · Physics 2021-08-11 Tomoya Naito , Gianluca Colò , Haozhao Liang , Xavier Roca-Maza

Pronounced changes of nuclear charge radii provide a stringent benchmark on the theoretical models and play a vital role in recognizing various nuclear phenomena. In this work, the systematic evolutions of nuclear charge radii along even…

Nuclear Theory · Physics 2023-03-28 Rong An , Xiao-Xu Dong , Li-Gang Cao , Feng-Shou Zhang