A5024740786- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Magnetic properties of thin films
- Magnetic Properties and Applications
- Nuclear Physics and Applications
- Theoretical and Computational Physics
- Rare-earth and actinide compounds
- Advanced NMR Techniques and Applications
- Quantum, superfluid, helium dynamics
- High-Energy Particle Collisions Research
- Characterization and Applications of Magnetic Nanoparticles
- Magneto-Optical Properties and Applications
- High-pressure geophysics and materials
- Quantum chaos and dynamical systems
- Nuclear reactor physics and engineering
- Atomic and Subatomic Physics Research
- Astro and Planetary Science
- Magnetic and transport properties of perovskites and related materials
- Quantum and electron transport phenomena
- Electrocatalysts for Energy Conversion
- Magnetic Properties and Synthesis of Ferrites
- Corrosion Behavior and Inhibition
Southwest University
2016-2025
Southern Medical University
2024
Beihang University
2024
Institute of Modern Physics
2024
Chinese Academy of Sciences
2006-2024
Sichuan University
2023
Henan Polytechnic University
2023
Qiannan Normal College For Nationalities
2018-2019
Oak Ridge National Laboratory
2017
Capital Normal University
2014-2015
A new parametrization PC-PK1 for the nuclear covariant energy density functional with nonlinear point-coupling interaction is proposed by fitting to observables 60 selected spherical nuclei, including binding energies, charge radii and empirical pairing gaps. The success of illustrated in its description infinite matter finite nuclei ground-state low-lying excited states. Particularly, improves isospin dependence along either isotopic or isotonic chains, which makes it more reliable...
There has been much recent interest in nuclear fission, due part to a new appreciation of its relevance astrophysics, stability superheavy elements, and fundamental theory neutrino interactions. At the same time, there have important developments on conceptual computational level for theory. The promising theoretical avenues were subject workshop held at University York October 2019; this report summarises findings recommendations.
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...
Mean lifetime measurements of low-lying yrast positive- and negative-parity states <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>Gd</a:mi><a:mprescripts/><a:none/><a:mn>150</a:mn></a:mmultiscripts></a:math> have been performed with the ROSPHERE array using <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mrow><b:mmultiscripts><b:mi>Ce</b:mi><b:mprescripts/><b:none/><b:mn>140</b:mn></b:mmultiscripts><b:mo>(</b:mo><b:mmultiscripts><b:mi...
The framework of relativistic energy density functionals is extended to include correlations related the restoration broken symmetries and fluctuations collective variables. A new implementation developed for solution eigenvalue problem a five-dimensional Hamiltonian quadrupole vibrational rotational degrees freedom, with parameters determined by constrained self-consistent mean-field calculations triaxial shapes. model tested in series illustrative potential surfaces resulting excitation...
We have used the unique spatial sensitivity of polarized neutron and soft x-ray beams in reflection geometry to measure depth dependence magnetization across interface between a ferromagnet an antiferromagnet. The net uncompensated near responds applied field, while spins antiferromagnet bulk are pinned, thus providing means establish exchange bias.
The analysis of shape transitions in Nd isotopes, based on the framework relativistic energy-density functionals and restricted to axially symmetric shapes T. Nik\ifmmode \check{s}\else \v{s}\fi{}i\ifmmode \acute{c}\else \'{c}\fi{}, D. Vretenar, G. A. Lalazissis, P. Ring [Phys. Rev. Lett. 99, 092502 (2007)], is extended region $Z=60,62,64$ with $N\ensuremath{\approx}90$ includes both $\ensuremath{\beta}$ $\ensuremath{\gamma}$ deformations. Collective excitation spectra transition...
The cooling field dependence of the exchange bias in ferromagnet/antiferromagnet (FM/AF) multilayers demonstrates that bulk AF spin structure plays a crucial role on origin bias. FM/AF/FM trilayers were designed to eliminate any interlayer coupling between FM slabs. By choosing magnetic field, is ordered below its Néel temperature with layers fully saturated either parallel or antiparallel each other. significant difference these two configurations confirms cannot be purely interfacial...
We report on a seven-dimensional generator coordinate calculation in the two deformation parameters $\ensuremath{\beta}$ and $\ensuremath{\gamma}$ together with projection three-dimensional angular momentum particle numbers for low-lying states ${}^{76}\mathrm{Kr}$. These calculations are based covariant density functional theory. Excellent agreement is found data spectrum electric multipole transition strengths. This answers important question of dynamic correlations triaxiality fully...
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...
Using polarized neutron reflectometry, we obtained separate depth profiles for pinned and unpinned magnetization across the interface of a ferromagnet/antiferromagnet bilayer as function sign exchange bias. The are nonuniform extend well beyond chemical interface, suggesting an interfacial region magnetically distinct from its surroundings. A model that includes moments in ferromagnet antiferromagnet is developed complete description data.
Neutron-deficient krypton isotopes are of particular interest due to the coexistence oblate and prolate shapes in low-lying states transition ground-state from one dominate shape another as a function neutron number. A detailed interpretation these phenomena neutron-deficient Kr requires use method going beyond mean-field approach that permits determine spectra probabilities. The aim this work is provide systematic calculation state even-even 68-86Kr understand phenomenon onset large...
Static and dynamic aspects of the fission process $^{226}\mathrm{Th}$ are analyzed in a self-consistent framework based on relativistic energy density functionals. Constrained mean-field calculations collective space axially symmetric quadrupole octupole deformations, functional PC-PK1 $\ensuremath{\delta}$-force pairing, performed to determine potential surface fissioning nucleus, scission line, single-nucleon wave functions, energies, occupation probabilities, as functions deformation...
We report the first global study of dynamic correlation energies (DCEs) associated with rotational motion and quadrupole shape vibrational in a covariant energy density functional (CEDF) for 575 even-even nuclei proton numbers ranging from $Z=8$ to $Z=108$ by solving five-dimensional collective Hamiltonian, parameters which are determined triaxial relativistic mean field plus BCS calculation using PC-PK1 force. After taking into account these beyond mean-field DCEs, root-mean-square (rms)...
The nuclear landscape has been investigated within the triaxial relativistic Hartree-Bogoliubov theory with PC-PK1 density functional, and beyond-mean-field dynamical correlation energies are taken into account by a microscopically mapped five-dimensional collective Hamiltonian without additional free parameters. effects of deformation correlations on analyzed. present results provide best description experimental binding energies, in particular for medium heavy mass regions, comparison...
The rapid transition between spherical and $γ$-soft shapes in Ba Xe nuclei the mass region $A \geq 130$ is analyzed using excitation spectra collective wave functions obtained by diagonalization of a five-dimensional Hamiltonian for quadrupole vibrational rotational degrees freedom, with parameters determined constrained self-consistent relativistic mean-field calculations triaxial shapes. results reproduce characteristic evolution E2 probabilities and, general, good agreement available data...
We measure the magnetic damping parameter a in thin film CoFeB and permalloy (Py) nanomagnets at room temperature using ferromagnetic resonance driven by microwave frequency spin-transfer torque. obtain $\alpha_{CoFeB} = 0.014 \pm 0.003$ $\alpha_{Py}=0.010 0.002$, values comparable to measurements for extended films, but significantly less than effective determined previously similar fits time-domain studies of large-angle excitations reversal. The greater found large amplitude nanomagnet...
The structure of low-energy collective states in proton-deficient $N=28$ isotones is analyzed using models based on the relativistic energy density functional DD-PC1. Hartree-Bogoliubov model for triaxial nuclei used to calculate binding maps $\ensuremath{\beta}$-$\ensuremath{\gamma}$ plane. evolution neutron and proton single-particle levels with quadrupole deformation, occurrence gaps around Fermi surface, provide a simple microscopic interpretation onset deformation shape coexistence....
The nature of the chiral candidate bands in $^{106}\mathrm{Ag}$, one only two known examples candidates which actually cross, is investigated experimentally and theoretically. Lifetimes have been determined for these $^{106}\mathrm{Ag}$ using Doppler-shift attenuation method with $\ensuremath{\gamma}$-detector array AFRODITE. level scheme has extended, three negative-parity observed to high spins. Configurations were assigned based on a quasiparticle alignment analysis configuration-fixed...
The rapid structural change in low-lying collective excitation states of neutron-rich Sr and Zr isotopes is studied by solving a five-dimensional Hamiltonian with parameters determined from both relativistic mean-field nonrelativistic Skyrme-Hartree-Fock calculations using the PC-PK1 SLy4 forces, respectively. Pair correlations are treated BCS method either separable pairing force or density-dependent zero-range force. isotope shifts, energies, electric monopole quadrupole transition...