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Nonuniform structure of low-density nuclear matter, known as nuclear pasta, is expected to appear not only in the inner crust of neutron stars but also in core-collapse supernova explosions and neutron-star mergers. We perform fully…

核理论 · 物理学 2021-05-19 Fan Ji , Jinniu Hu , Hong Shen

Geometrical structure of matter at subnuclear densities is investigated in the presence of a degenerate gas of neutrinos as encountered in stellar collapse. The crystalline phases with spherical, cylindrical and planar nuclei as well as…

天体物理学 · 物理学 2009-10-31 Gentaro Watanabe , Kei Iida , Katsuhiko Sato

The dense neutron-rich matter found in supernovae and neutron stars is expected to form complex nonuniform phases referred to as nuclear pasta. The pasta shapes depend on density, temperature and proton fraction and determine many transport…

核理论 · 物理学 2014-12-03 A. S. Schneider , D. K. Berry , C. M. Briggs , M. E. Caplan , C. J. Horowitz

We investigate nuclear pasta structures at high temperatures in the framework of relativistic mean field model with Thomas-Fermi approximation. Typical pasta structures (droplet, rod, slab, tube, and bubble) are obtained, which form various…

核理论 · 物理学 2022-09-28 Cheng-Jun Xia , Toshiki Maruyama , Nobutoshi Yasutake , Toshitaka Tatsumi

We investigate nuclear pasta phases appearing in hot neutron-star matter based on the compressible liquid-drop model, where the matter consists of a dense liquid phase and a dilute gas phase separated by a sharp interface. The surface…

核理论 · 物理学 2026-03-18 Jian Zhou , Junbo Pang , Hong Shen , Jinniu Hu

Nuclear pasta, that is an inhomogeneous distribution of nuclear matter characterised by non-spherical clustered structures, is expected to occur in a narrow spatial region at the bottom of the inner crust of neutron stars, but the width of…

高能天体物理现象 · 物理学 2021-11-09 H. Dinh Thi , A. F. Fantina , F. Gulminelli

We study the effect of isospin-dependent nuclear forces on the pasta phase in the inner crust of neutron stars. To this end we model the crust within the framework of quantum molecular dynamics (QMD). For maximizing the numerical…

核理论 · 物理学 2016-08-29 Rana Nandi , Stefan Schramm

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…

天体物理学 · 物理学 2009-10-31 Gentaro Watanabe , Kei Iida , Katsuhiko Sato

In this work, we focus on different length scales within the dynamics of nucleons in conditions according to the neutron star crust, with a semiclassical molecular dynamics model, studying isospin symmetric matter at subsaturation…

核理论 · 物理学 2014-12-22 Pablo N. Alcain , Pedro A. Giménez Molinelli , Claudio O. Dorso

The first results of a new three-dimensional, finite temperature Skyrme-Hartree-Fock+BCS study of the properties of inhomogeneous nuclear matter at densities and temperatures leading to the transition to uniform nuclear matter are…

太阳与恒星天体物理 · 物理学 2009-05-05 W. G. Newton J. R. Stone

In the framework of the relativistic mean field model with Thomas-Fermi approximation, we study the structures of low density nuclear matter in a three-dimensional geometry with reflection symmetry. The numerical accuracy and efficiency are…

We investigate the effects of the symmetry energy on nuclear pasta phases and the crust-core transition in neutron stars. We employ the relativistic mean-field approach and the coexisting phases method to study the properties of pasta…

核理论 · 物理学 2015-06-19 S. S. Bao , H. Shen

Modification of nuclear reactions due to impurities in plasma is investigated. The hindering effect of Coulomb repulsion between reacting particles, that is effective in direct reactions, can practically disappear if Coulomb interaction of…

综合物理 · 物理学 2018-01-16 Péter Kálmán , Tamás Keszthelyi

We calculate the thermal conductivity of electrons for the strongly correlated multi-component ion plasma expected in the outer layers of neutron star's crust employing a Path Integral Monte Carlo (PIMC) approach. This allows us to isolate…

高能天体物理现象 · 物理学 2016-07-20 Alessandro Roggero , Sanjay Reddy

Structure of cold and hot dense matter at subnuclear densities is investigated by quantum molecular dynamics (QMD) simulations. Obtained phase diagrams show that the density of the phase boundaries between the different nuclear structures…

天体物理学 · 物理学 2007-05-23 Gentaro Watanabe , Katsuhiko Sato , Kenji Yasuoka , Toshikazu Ebisuzaki

To explain several properties of finite nuclei, infinite matter, and neutron stars in a unified way within the relativistic mean field models, it is important to extend them either with higher order couplings or with density-dependent…

核理论 · 物理学 2013-04-09 Neha Gupta , P. Arumugam

More than twenty years ago, it was predicted that nuclei can adopt interesting shapes, such as rods or slabs, etc., in the cores of supernovae and the crusts of neutron stars. These non-spherical nuclei are referred to as nuclear "pasta".…

软凝聚态物质 · 物理学 2007-05-23 Gentaro Watanabe , Hidetaka Sonoda

We use the quantum Monte Carlo (QMC) techniques to calculate the static structure function $S(q)$ of a one-component ion lattice and use it to calculate the thermal conductivity $\kappa$ of high-density solid matter expected in the neutron…

高能天体物理现象 · 物理学 2015-10-28 Sajad Abbar , Joe Carlson , Huaiyu Duan , Sanjay Reddy

Background: Nuclear pasta phases, present in the inner crust of neutron stars, are associated with nucleonic matter at sub-saturation densities arranged in regular shapes. Those complex phases, residing in a layer which is approximately 100…

核理论 · 物理学 2016-05-02 B. Schuetrumpf , W. Nazarewicz

Nuclear pasta, with nucleons arranged into tubes, sheets, or other complex shapes, is expected in core collapse supernovae (SNe) at just below nuclear density. We calculate the additional opacity from neutrino-pasta coherent scattering…

高能天体物理现象 · 物理学 2016-12-01 C. J. Horowitz , D. K. Berry , M. E. Caplan , T. Fischer , Zidu Lin , W. G. Newton , E. O'Connor , L. F. Roberts