A5068050009- Nuclear physics research studies
- Astronomical and nuclear sciences
- Quantum Chromodynamics and Particle Interactions
- Advanced Chemical Physics Studies
- Nuclear Physics and Applications
- Semiconductor materials and devices
- Nuclear reactor physics and engineering
- Advancements in Semiconductor Devices and Circuit Design
- Silicon and Solar Cell Technologies
- Advanced NMR Techniques and Applications
- Radiation Effects in Electronics
- High-Energy Particle Collisions Research
- Rare-earth and actinide compounds
- Integrated Circuits and Semiconductor Failure Analysis
- Atomic and Molecular Physics
- High-pressure geophysics and materials
- Quantum, superfluid, helium dynamics
- Advanced Memory and Neural Computing
- Internet of Things and Social Network Interactions
- Millimeter-Wave Propagation and Modeling
- Cold Fusion and Nuclear Reactions
- Korean Urban and Social Studies
- Gyrotron and Vacuum Electronics Research
- Gallbladder and Bile Duct Disorders
- Theoretical and Computational Physics
Shenyang Normal University
2025
Peng Cheng Laboratory
2020-2024
Harbin Institute of Technology
2019-2024
Chinese Academy of Sciences
2012-2022
Institute of Microelectronics
2022
University of Chinese Academy of Sciences
2022
China Academy of Engineering Physics
2017-2021
University of Zagreb
2015-2020
Institute of Theoretical Physics
2012-2017
Institute of Physics
2016
Background: Many different shape degrees of freedom play crucial roles in determining the nuclear ground state and saddle point properties fission path. For study potential energy surfaces, it is desirable to have microscopic self-consistent models which all known important are included.Purpose: By breaking both axial spatial reflection symmetries simultaneously, we develop multidimensionally-constrained relativistic mean field (MDC-RMF) models.Methods: The assumed be invariant under...
Two pairs of positive-and negative-parity doublet bands together with eight strong electric dipole transitions linking their yrast positive- and have been identified in ^{78}Br. They are interpreted as multiple chiral octupole correlations, which is supported by the microscopic multidimensionally-constrained covariant density functional theory triaxial particle rotor model calculations. This observation reports first example geometry soft nuclei.
We explore the interplays among formation of a halo, deformation effects, inversion sd states, shell evolution, and changes nuclear magicities in 22C by using deformed relativistic Hartree–Bogoliubov model continuum. It is revealed that there an between two spherical orbitals 2s1/2 1d5/2 compared with conventional single particle structure stable nuclei. This inversion, together results shrunk halo quenched gap at N=16. predicted core oblate but prolate. Therefore several exotic phenomena,...
In the exothermic process of fission decay, an atomic nucleus splits into two or more independent fragments. Several aspects nuclear are not properly understood, in particular formation neck between nascent fragments, and subsequent mechanism scission Using implementation time-dependent density functional theory, based on a relativistic energy including pairing correlations, we analyze final phase induced ^{240}Pu, show that timescale coincides with assembly α-like clusters. Because its much...
Studies of fission dynamics, based on nuclear energy density functionals, have shown that the coupling between shape and pairing degrees freedom has a pronounced effect nonperturbative collective inertia and, therefore, dynamic (least-action) spontaneous paths half-lives. Collective potentials cranking tensors are calculated using multidimensionally-constrained relativistic mean-field (MDC-RMF) model. Pairing correlations treated in BCS approximation separable force finite range....
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...
The dynamics of induced fission $^{226}\mathrm{Th}$ is investigated in a theoretical framework based on the finite-temperature time-dependent generator coordinate method (TDGCM) Gaussian overlap approximation (GOA). thermodynamical collective potential and inertia tensor at temperatures interval $T=0--1.25$ MeV are calculated using self-consistent multidimensionally constrained relativistic mean-field (MDC-RMF) model, energy density functional DD-PC1. Pairing correlations treated BCS with...
The dynamics of low-energy-induced fission is explored using a consistent microscopic framework that combines the time-dependent generator coordinate method (TDGCM) and nuclear density functional theory (TDDFT). While former presents fully quantum mechanical approach describes entire process as an adiabatic evolution collective degrees freedom, latter models dissipative final stage by propagating nucleons independently toward scission beyond. two methods, based on same energy pairing...
The nonaxial reflection-asymmetric ${\ensuremath{\beta}}_{32}$ shape in some transfermium nuclei with $N=150$, namely, ${}^{246}$Cm, ${}^{248}$Cf, ${}^{250}$Fm, and ${}^{252}$No, are investigated multidimensional constrained covariant density functional theories. By using the density-dependent point-coupling theory parameter set DD-PC1 particle-hole channel, it is found that, for ground states of ${}^{248}$Cf octupole deformation ${\ensuremath{\beta}}_{32}>0.03$ energy gain due to distortion...
Potential energy surfaces (PES's) of actinide nuclei are characterized by a two-humped barrier structure. At large deformations beyond the second occurrence third one was predicted Mic-Mac model calculations in 1970s, but contradictory results were later reported. In this paper, triple-humped barriers investigated with covariant density functional theory (CDFT). Calculations performed using multidimensionally-constrained relativistic mean field (MDC-RMF) model, functionals PC-PK1 and DD-ME2....
Low-energy positive and negative parity collective states in the equilibrium minimum, dynamics of induced fission actinide nuclei are investigated a unified theoretical framework based on generator coordinate method (GCM) with Gaussian overlap approximation (GOA). The potential inertia tensor, both at zero finite temperature, computed using self-consistent multidimensionally constrained relativistic mean field model, energy density functional DD-PC1. Pairing correlations treated...
The saddle-to-scission dynamics of the induced fission process is explored using a microscopic finite-temperature model based on time-dependent nuclear density functional theory (TDDFT), that allows to follow evolution local temperature along trajectories. Starting from corresponds experimental excitation energy compound system, propagates nucleons isentropic paths toward scission. For four illustrative cases $^{240}$Pu, $^{234}$U, $^{244}$Cm, and $^{250}$Cf, characteristic trajectories are...
The emerging trend of advancing generalist artificial intelligence, such as GPTv4 and Gemini, has reshaped the landscape research (academia industry) in machine learning many other areas. However, domain-specific applications foundation models (e.g., medicine) remain untouched or often at their very early stages. It will require an individual set transfer model adaptation techniques by further expanding injecting these with domain knowledge data. development technologies could be largely...
We develop a multidimensionally constrained relativistic Hartree-Bogoliubov (MDC-RHB) model in which the pairing correlations are taken into account by making Bogoliubov transformation. In this model, nuclear shape is assumed to be invariant under reversion of $x$ and $y$ axes; i.e., intrinsic symmetry group ${V}_{4}$ all degrees freedom ${\ensuremath{\beta}}_{\ensuremath{\lambda}\ensuremath{\mu}}$ with even $\ensuremath{\mu}$ included self-consistently. The RHB equation solved an axially...
Starting from a quantum theory of dissipation for nuclear collective motion introduced by Kerman and Koonin [Phys. Scr. 10, 118 (1974)], the time-dependent generator coordinate method (TDGCM) is extended to allow effects in description induced fission dynamics. The extension based on generalization GCM generating functions that includes excited states, resulting equation coordinates excitation energy. With assumption narrow Hamiltonian kernel, an expansion power series momenta leads...
Recent reaction measurements have been interpreted as evidence of a halo structure in the exotic neutron-rich isotopes 29,31Ne. While theoretical studies 31Ne generally agree on its nature, they differ significantly their predictions properties and underlying cause (e.g., that has an inverted ordering p–f orbitals). We made systematic analysis possible Neon signatures – first using fully microscopic, relativistic mean field approach properly treats positive energy orbitals (such valence...
Background: Recent microscopic studies, based on the theoretical framework of nuclear energy density functionals, have analyzed dynamic (least action) and static (minimum energy) fission paths, it has been shown that in addition to important role played by nonaxial and/or octupole collective degrees freedom, paths crucially depend approximations adopted calculating inertia.Purpose: To analyze effects triaxial deformations, as well inertia, symmetric asymmetric spontaneous dynamics, compare...
<title>Abstract</title> As a critical component of the Digital China initiative, construction digital villages plays pivotal role in rural modernization and significantly influences prosperity residents. This study, grounded 2023 Opinions Central Committee Communist Party State Council on Promoting Comprehensive Rural Revitalization, establishes an evaluation index system for assessing residents' living standards from three dimensions: subsistence, social security, quality life. Utilizing...
A model is developed to calculate the total kinetic energy (TKE) distribution of fission fragments in framework time-dependent generator coordinate method, extended include dissipation effects description induced dynamics. Starting from an expression for dissipative term method Hamiltonian that determines time evolution a statistical collective wave function, derived first part this work, integrated flux probability current through scission hypersurface can be computed at different...
A microscopic calculation of half-lives for both the $\ensuremath{\alpha}$ and $2\ensuremath{\alpha}$ decays $^{212}\mathrm{Po}$ $^{224}\mathrm{Ra}$ is performed, using a self-consistent framework based on energy density functionals. relativistic functional separable pairing interaction finite range are used to compute axially symmetric deformation surfaces as functions quadrupole, octupole, hexadecapole collective coordinates. Dynamical least-action paths determined, that trace emission...
The role of dynamical pairing in induced fission dynamics is investigated using the time-dependent generator coordinate method Gaussian overlap approximation, based on microscopic framework nuclear energy density functionals. A calculation fragment charge yields for $^{228}$Th performed a three-dimensional space collective coordinates that, addition to axial quadrupole and octupole intrinsic deformations density, also includes an isoscalar degree freedom. It shown that inclusion has...
$\ensuremath{\alpha}$ and cluster decays are analyzed for heavy nuclei located above $^{208}\mathrm{Pb}$ on the chart of nuclides: $^{216--220}\mathrm{Rn}$ $^{220--224}\mathrm{Ra}$, which also candidates observing $2\ensuremath{\alpha}$ decay mode. A microscopic theoretical approach based relativistic energy density functionals (EDF), is used to compute axially symmetric deformation-energy surfaces as functions quadrupole, octupole, hexadecupole collective coordinates. Dynamical least-action...
High-spin states of $^{123}\mathrm{Ba}$ have been studied via the $^{108}\mathrm{Cd}(^{19}\mathrm{F},3np)^{123}\mathrm{Ba}$ fusion-evaporation reaction at a beam energy 90 MeV. Several $E1$ transitions linking positive-parity $\ensuremath{\nu}({d}_{5/2}+{g}_{7/2})$ band and negative-parity $\ensuremath{\nu}{h}_{11/2}$ are observed in for first time. Evidence existence octupole correlations is presented based on systematic comparisons $B(E1)/B(E2)$ branching ratios displacements odd-$A$ Ba...