A5000683634- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Pulsars and Gravitational Waves Research
- Advanced NMR Techniques and Applications
- Nuclear Physics and Applications
- Quantum, superfluid, helium dynamics
- High-pressure geophysics and materials
- Astronomical and nuclear sciences
- Nuclear reactor physics and engineering
- High-Energy Particle Collisions Research
- Quantum chaos and dynamical systems
- Scientific Research and Discoveries
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Gamma-ray bursts and supernovae
- Astro and Planetary Science
- Rare-earth and actinide compounds
- Statistical Mechanics and Entropy
- Particle Accelerators and Free-Electron Lasers
- Geophysics and Gravity Measurements
- Mathematical functions and polynomials
Institute for Basic Science
2016-2025
Technical University of Darmstadt
2004-2020
National and Kapodistrian University of Athens
2000-2020
Institute of Nuclear and Particle Physics
2000-2020
Institut de Physique
2013-2014
Institut National de Physique Nucléaire et de Physique des Particules
2013-2014
Centre National de la Recherche Scientifique
2013-2014
Université Paris-Sud
2013-2014
The mass table in the deformed relativistic Hartree-Bogoliubov theory continuum (DRHBc) with PC-PK1 density functional has been established for even-$Z$ nuclei $8\le Z\le120$, extended from previous work even-even [Zhang $\it{et.~al.}$ (DRHBc Mass Table Collaboration), At. Data Nucl. Tables 144, 101488 (2022)]. calculated binding energies, two-nucleon and one-neutron separation root-mean-square (rms) radii of neutron, proton, matter, charge distributions, quadrupole deformations, neutron...
The aim of this work is to develop the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) based on point-coupling density functionals and extend it provide a unified description for all even-even nuclei nuclear chart by overcoming possible challenges. superfluidity considered via Bogoliubov transformation. Densities potentials are expanded terms Legendre polynomials include axial deformation degrees freedom. Sophisticated equations coordinate space solved DiracWoods-Saxon...
Background: One fascinating frontier in nuclear physics is the study of exotic nuclei. The deformed relativistic Hartree-Bogoliubov theory continuum (DRHBc), which simultaneously includes superfluidity, deformation, and effects, can provide proper descriptions for both stable In a previous work [Zhang et al., Phys. Rev. C 102, 024314 (2020)], DRHBc based on point-coupling density functionals was developed calculation, previously accessible only light nuclei, extended all even-even nuclei...
Halos and changes of nuclear magicities have been extensively investigated in exotic nuclei during past decades. The newly discovered $^{39}$Na with the neutron number $N=28$ provides a new platform to explore such novel phenomena near dripline sodium isotopic chain. We study shell property possible halo structure within deformed relativistic Hartree-Bogoliubov theory continuum. It is found that lowering $2p$ orbitals spherical limit results collapse closure $^{39}$Na, well ground state...
We investigate the density dependence of nuclear symmetry energy $S(\rho ) $ in KIDS (Korea-IBS-Daegu-SKKU) framework for equation state (EoS) and energy-density functional (EDF). The aim is to constrain value curvature parameter ($K_{\rm sym}$) based on recent astronomical data. First, assuming a standard saturation point, we calculate bulk properties within KIDS-EDF different values compression modulus symmetric matter ($K_0$) leading-order parameters, i.e., ($J$) slope ($L$) at density,...
We employ the unitary correlation operator method (UCOM) to construct correlated, low-momentum matrix elements of realistic nucleon-nucleon interactions. The dominant short-range central and tensor correlations induced by interaction are included explicitly an transformation. Using correlated momentum-space Argonne V18 potential, we show that transformation eliminates strong off-diagonal contributions caused repulsion leaves a dominated contributions. use harmonic oscillator as input for...
We employ correlated realistic nucleon-nucleon interactions for the description of nuclear ground states throughout chart within Hartree-Fock approximation. The crucial short-range central and tensor correlations, which are induced by interaction cannot be described many-body state itself, included explicitly a state-independent unitary transformation in framework correlation operator method (UCOM). Using ${V}_{\mathrm{UCOM}}$ resulting from Argonne V18 potential, bound nuclei already...
Two different experimental approaches were combined to study the electric dipole strength in doubly-magic nucleus 48Ca below neutron threshold. Real-photon scattering experiments using bremsstrahlung up 9.9 MeV and nearly mono-energetic linearly polarized photons with energies between 6.6 9.51 provided distribution parities, an (α,α′γ) experiment at Eα=136MeV gave cross sections for isoscalar probe. The unexpected difference observed response is compared calculations first-order random-phase...
We apply a large-scale summation of Feynman diagrams, including the class parquet-diagrams plus important contributions outside parquet class, for calculating effective pairing interactions and subsequently superfluid gap in $P$-wave neutron matter. employ realistic nucleon-nucleon ${v}_{8}$ type perform calculations up to Fermi momentum $1.8\phantom{\rule{4pt}{0ex}}{\mathrm{fm}}^{\ensuremath{-}1}$. find that many-body correlations lead strong reduction spin-orbit interaction, and,...
Inspired by the recent debate as to whether proton drip-line nucleus 22Al demonstrates a halo structure in its ground state and order assess such possibility, we have analyzed theoretical results obtained within relativistic density functional theory number of neighboring nuclei especially along isotopic, isotonic, isobaric chains. The includes self-consistently effects pairing, deformation continuum. We employ two different parameterizations, PC-F1 PC-PK1. Although valence is found very...
The shape of a nucleus is one its fundamental properties. We conduct systematic investigation coexistence in odd-Z nuclei from fluorine to potassium using the deformed relativistic Hartree–Bogoliubov theory continuum. First, we present simple argument regarding energy differences between degenerate vacua, which can serve as criterion for identifying candidates coexistence. then predict isotopes that exhibit
We examine the response of closed-shell nuclei using a correlated interaction, derived with Unitary Correlation Operator Method (UCOM) from Argonne V18 potential, in second RPA (SRPA) calculations. The same two-body interaction is used to derive Hartree-Fock ground state and SRPA equations. Our results show that coupling particle-hole states higher-order configurations produces sizable effects compared first-order RPA. A much improved description isovector dipole isoscalar quadrupole...
Second RPA (SRPA) calculations of nuclear response are performed and analyzed. Unlike in most other SRPA applications, the ground state, approximated by Hartree-Fock (HF) residual couplings described same Hamiltonian no arbitrary truncations imposed on model space. Finite-range interactions used thus divergence problems not present. We employ a realistic interaction, derived from Argonne V18 potenial using unitary correlation operator method (UCOM), as well simple Brink-Boeker interaction....
The explicit density (rho) dependence in the coupling coefficients of non-relativistic nuclear energy-density functional (EDF) encodes effects three-nucleon forces and dynamical correlations. necessity for a coefficient form small fractional power rho is empirical often chosen arbitrarily. Consequently, precision-oriented parameterisations risk overfitting loss predictive power. Observing that Fermi momentum kF~rho^1/3 key variable systems, we examine if hierarchy kF can be inferred from...
The location of the neutron drip line, currently known for only lightest elements, remains a fundamental question in nuclear physics. Its description is challenge microscopic energy density functionals, as it must take into account realistic way not potential, but also pairing correlations, deformation effects and coupling to continuum. recently developed deformed relativistic Hartree–Bogoliubov theory continuum (DRHBc) includes all three aforementioned nuclei throughout chart. Here, DRHBc...
We explore the properties of medium-mass and heavy nuclear clusters embedded in a gas nucleons with help Skyrme-Hartree-Fock microscopic calculations at zero temperature. Two alternative representations are introduced, namely coordinate-space energy-space clusters. parametrize their density profiles spherical symmetry terms basic energy functionals used propose an analytical, Woods-Saxon profile whose parameters depend, not only on composition cluster, but also that nucleon gas. study...
Background: The properties of very neutron rich nuclear systems are largely determined by the density dependence symmetry energy. Korea-IBS-Daegu-SKKU (KIDS) framework for equation state (EoS) and energy functional (EDF) offers possibility to explore symmetry-energy parameters such as $J$ (value at saturation density), $L$ (slope saturation), ${K}_{\mathrm{sym}}$ (curvature higher-order ones independently each other assumptions about in-medium effective mass, previously shown in cases...
Abstract The presence of superfluidity in neutron star interiors can affect the cooling stars intricate ways, enhancing certain mechanisms and suppressing others. Model calculations employing realistic nuclear potentials Bardeen–Cooper–Schrieffer theory generally suggest development a 3 P 2 – F pairing gap, therefore dense matter. Improved models that go beyond conventional mean-field by including polarization effects suppression triplet gap. We have evaluated interaction summing “parquet”...
We study the low-energy dipole (LED) strength distribution along Sn isotopic chain in both isoscalar (IS) and isovector (IV, or E1) electric channels, to provide testable predictions guidance for new experiments with stable targets radioactive beams. use self-consistent Quasi-particle Random-Phase Approximation (QRPA) finite-range interactions mainly Gogny D1S force. analyze also performance of a realistic two-body interaction supplemented by phenomenological three-body contact term. find...
Based on the Skyrme-Hartree-Fock model (SHF) as well its extension (the Korea-IBS-Daegu-SKKU (KIDS) model) and relativistic mean-field (RMF) model, we have studied constraints parameters of nuclear matter equation state (EOS) from adopted astrophysical observables using a Bayesian approach. While masses radii neutron stars generally favors stiff isoscalar EOS moderately soft symmetry energy, dependence is observed mostly originates incorporation higher-order difference between...
We have developed a fully consistent framework for calculations in the quasiparticle random-phase approximation (QRPA) with $\mathrm{NN}$ interactions from Similarity Renormalization Group (SRG) and other unitary transformations of realistic interactions. The consistency our calculations, which use same Hamiltonian to determine Hartree-Fock-Bogoliubov ground states residual interaction QRPA, guarantees an excellent decoupling spurious strength, without need empirical corrections. While work...
Recent astronomical observations, nuclear-reaction experiments, and microscopic calculations have placed new constraints on the nuclear equation of state (EoS) revealed that most structure models fail to satisfy those upon extrapolation infinite matter. A reverse procedure for imposing EoS has been elusive. Here we present first time a method generate energy density functional (EDF) nuclei from given immutable EoS. The takes advantage natural Ansatz homogeneous matter, Kohn-Sham framework,...
The nuclear equation of state (EOS) is at the center numerous theoretical and experimental efforts in physics. With advances microscopic theories for interactions, availability experiments probing matter under conditions not reached before, endeavors to develop sophisticated reliable transport simulations interpret these experiments, advent multi-messenger astronomy, next decade will bring new opportunities determining EOS, elucidating its dependence on density, temperature, isospin...