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The mass-dependent symmetry energy coefficients $a_{sym}(A)$ has been extracted by analysing the heavy nuclear mass differences reducing the uncertainties as far as possible in our previous work. Taking advantage of the obtained symmetry…

核理论 · 物理学 2015-05-08 Xiaohua Fan , Jianmin Dong , Wei Zuo

Photon strength, $f(E_{\gamma})$, measured in photonuclear reactions, is the product of the average level density per MeV, $\rho(E_x)$, and the average reduced level width, $\Gamma_{\gamma}/E_{\gamma}^3$ for levels populated primarily by E1…

核理论 · 物理学 2021-06-18 R. B. Firestone

We establish a correlation for the symmetry energy at saturation density $S_{0}$, slope parameter $L$ and curvature parameter $K_{\text{sym}}$ based on widely different mean field interactions. With the help of this correlation and…

核理论 · 物理学 2012-09-11 Jianmin Dong , Wei Zuo , Jianzhong Gu , Umberto Lombardo

The large imbalance in the neutron and proton densities in very neutron rich systems increases the nuclear symmetry energy so that it governs many aspects of neutron stars and their mergers. Extracting the density dependence of the symmetry…

核理论 · 物理学 2022-06-01 W. G. Lynch , M. B. Tsang

This paper compiles the model parameters and zero-temperature properties of an extensive collection of published theoretical nuclear interactions, including 255 non-relativistic (Skyrme-like) forces, 270 relativistic mean field (RMF) and…

核理论 · 物理学 2024-05-07 Boyang Sun , Saketh Bhattiprolu , James M. Lattimer

Many neutron star (NS) properties, such as the proton fraction within a NS, reflect the symmetry energy contributions to the Equation of State that dominate when neutron and proton densities differ strongly. To constrain these contributions…

The relativistic Hartree-BCS theory is applied to study the temperature dependence of nuclear shape and pairing gap for $^{166}Er$ and $^{170}Er$. For both the nuclei, we find that as temperature increases the pairing gap vanishes leading…

核理论 · 物理学 2009-11-06 B. K. Agrawal , Tapas Sil , J. N. De , S. K. Samaddar

One of the main ingredients in nuclear structure studies using shell model are the single-particle energy (spe). In order to obtain these values accurately, experimental data is needed. The region around the doubly magic nuclide 100Sn is…

核理论 · 物理学 2022-07-11 Abderrahmane Yakhelef , Serkan Akkoyun

The efficiency of the adiabatic demagnetization of nuclear spin system (NSS) of a solid is limited, if quadrupole effects are present. Nevertheless, despite a considerable quadrupole interaction, recent experiments validated the…

介观与纳米尺度物理 · 物理学 2021-12-15 V. M. Litvyak , R. V. Cherbunin , V. K. Kalevich , A. I. Lihachev , A. V. Nashchekin , M. Vladimirova , K. V. Kavokin

The local electric field gradients and magnetic dynamics of TaSb$_2$ have been studied using $^{121}$Sb, $^{123}$Sb, and $^{181}$Ta nuclear quadrupole resonance (NQR) with density functional theory (DFT) calculations using XRD-determined…

强关联电子 · 物理学 2024-03-20 T. Fujii , O. Janson , H. Yasuoka , H. Rosner , Yu. Prots , U. Burkhardt , M. Schmidt , M. Baenitz

The neutron emission in projectile fragmentation at relativistic energies was studied with the Large-Area-Neutron-Detector LAND coupled to the ALADIN forward spectrometer at the GSI Schwerionen-Synchrotron (SIS). Stable 124Sn and…

A fast neutron spectrometer consisting of segmented plastic scintillator and He-3 proportional counters was constructed for the measurement of neutrons in the energy range 1 MeV to 200 MeV. We discuss its design, principles of operation,…

仪器与探测器 · 物理学 2014-11-24 T. J. Langford , C. D. Bass , E. J. Beise , H. Breuer , D. K. Erwin , C. R. Heimbach , J. S. Nico

We present a few estimates of energy densities reached in heavy-ion collisions at the CERN SPS. The estimates are based on data and models of proton-nucleus and nucleus-nucleus interactions. In all of these estimates the maximum energy…

核理论 · 物理学 2009-01-07 Jan Pisut , Neva Pisutova , Boris Tomasik

A self-consistent approach based on finite temperature Green's functions is used to investigate thermodynamic properties of nuclear matter. The internal energy is derived from the diagrams associated to the interaction energy. Pressure and…

核理论 · 物理学 2008-11-26 V. Soma , P. Bozek

The superconductor Nb$_3$Sn has a high critical temperature and high critical field, widely used for high-field superconducting magnets. In this work we investigate its microscopic electronic structure with $^{93}$Nb nuclear magnetic…

A novel Information Theory based method for determining the density of states from prior information is presented. The energy dependence of the density of states is determined from the observed number of states per energy interval and model…

核理论 · 物理学 2009-09-25 B. J. Cole , N. J. Davidson , H. G. Miller

We investigate the nuclear symmetry energy and neutron star properties using a Bayesian analysis based on constraints from different chiral effective field theory calculations using new energy density functionals that allow for large…

核理论 · 物理学 2024-03-12 Yeunhwan Lim , Achim Schwenk

Recent observation of beta decay of 115-In to the first excited level of 115-Sn with an extremely low Q_beta value (Q_beta ~ 1 keV) could be used to set a limit on neutrino mass. To give restriction potentially competitive with those…

核实验 · 物理学 2009-11-11 C. M. Cattadori , M. De Deo , M. Laubenstein , L. Pandola , V. I. Tretyak

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 2011-05-25 W. G. Newton

Within the minimum model of neutron stars (NS) consisting of neutrons, protons and electrons, a new approach is proposed for inferring the symmetry energy of super-dense neutron-rich nucleonic matter above twice the saturation density…

核理论 · 物理学 2020-06-01 Bao-An Li , Wen-Jie Xie