Most papers are machine-translated to English; some are originally in English.
Showing 50 of 313 papers in Physics
Accurate atomic mass data hold significant application value in various research fields, in which Penning Trap mass spectrometry is considered the most precise experimental method. A cryogenic detection system is a key component for reading out the image charge of charged particles in Penning traps …
A first attempt to simulate the charge exchange process from C2+ to C- using the Monte Carlo software Geant4 has been accomplished, modeling low-energy C2+ ions passing through an exchange medium. The yields of Cq (q=-2, -1, 0, and +1) from injected C2+ with different energies into different exchang…
Neutron-rich boron, carbon, and nitrogen isotopes have garnered extensive experimental and theoretical interest. In the present work, we conducted a comprehensive study for these nuclei utilizing ab initio valence-space in-medium similarity renormalization group calculations with chiral nucleon-nucl…
The neutron yields induced by 500 MeV/u 4He ions bombarding a thick uranium target have been measured by the time-of-flight method at Heavy Ion Research Facility in Lanzhou. Simulations employing three Monte Carlo codes, GEANT4, FLUKA, and PHITS, were performed to calculate neutron yields under cond…
The energy response of an imaging detector based on a monolithic crystal is highly dependent on the position of the gamma ray interaction, which leads to a spectral drift of the imaging detector, known as the spectral drift related to incident position. It deteriorates the energy resolution of the d…
A novel experimental setup with spatially separated magnetic and electrostatic fields is proposed for proton and deuteron electric dipole moment (EDM) studies. The lattice design, which employs a spin compensator to achieve the "quasi-frozen" spin condition for precise measurements, demonstrates ada…
CT images provide medical practitioners with a scientific and intuitive rationale for the diagnosis of clinical diseases. The Internet of Medical Things (IoMT) and telemedicine facilitate the preservation, transmission, and application of medical data, driving the sharing of medical data, especially…
The vapor diffusion and transport resulting from steam generator tube rupture (SGTR) accidents are a majorconcern threatening lead-based reactor core safety. In this study, a high-parameter SGTR experimental platformand the multiphase multi-physics processes numerical simulation were developed to in…
DAYU3D is a modern three-dimensional (3D) computer code for thermal-hydraulic design and accident analysis in high temperature gas-cooled reactors (HTGRs), developed by the Institute of Nuclear and New Energy Technology (INET) at Tsinghua University. Compared to the traditional codes like TINTE, the…
A new multi-detector array named HALIMA (Hybrid Array for LIfetime MeAsurement) has been developed at Lanzhou, for nuclear structure studies in fission. The array comprises eight BGO-shielded High-Purity Germanium (HPGe) detectors and twenty fast Ce-doped Lanthanum Bromide [LaBr3(Ce)] detectors shie…
The full configuration interaction quantum Monte Carlo (FCIQMC) method, originally developed in quantum chemistry, has also been successful in both molecular and condensed matter systems. Another natural extension of this methodology would be its application to nuclear structure calculations. We hav…
Exploring the limits of neutron binding in atomic nuclei remains a central focus of nuclear physics. However, the experimental determination of the neutron drip line is challenging because of the minuscule production cross sections of the most neutron-rich isotopes. We investigated the effectiveness…
The tensor force changes the nuclear shell structure, and thus may result in underlying influence the collectivity and decay properties of the nucleus. We carefully examined the impact of the monopole and multipole effects originating from the tensor force on both the collectivity and the matrix ele…
The molten salt reactor, one of the six fourth-generation reactor types, employs liquid nuclear fuel and graphite as a moderator. Graphite also serves as a core structural component, forming fuel salt channels in a honeycomb-like configuration. To ensure effective core design management and nuclear …
The neutron excess effect, originating from the vanishing of one part of (\bm{\tau}\text{1} \cdot \bm{\tau}\text{2}) operator matrix elements, was appropriately considered within the Skyrme-type $\Lambda N N$ three-body interactions and applied to the deformed SHF model. Analysis of a broad range of…
Using Kolmogorov-Arnold Networks (KANs), we construct a holographic model informed by lattice QCD data. This neural network approach enables the derivation of an analytical solution for the deformation factor $w(r)$ and the determination of a constant $g$ related to the string tension. Within the KA…
The process of nuclear fusion in the presence of a laser field is analyzed theoretically. The analysis is applicable to most fusion reactions and different kinds of currently available intense lasers, from X-ray free electron lasers to solid-state near-infrared lasers. Laser fields are shown to enha…
In this work, we report a scintillator used for neutron/gamma discrimination, which consists of a polyvinyltoluene matrix loaded with monomers of dimethoxydiphenylsilane (DDS), and fluor dyes, namely 2,5-diphenyloxazole and 7-diethylamino-4-methylcoumarin as the primary fluorophore and wavelength-sh…
In order to develop a temperature-sensitive fiber optic cable suitable for fire detection of activated carbon iodine adsorber, this paper proposes a design method for an irradiation-resistant and high-temperature-resistant linear temperature-sensitive fiber optic cable. Through the use of PCVD combi…
In this paper, we propose a novel design for a stationary CT system, termed the Alternating Source-Detector Array stationary CT (ASDA-sCT). The ASDA-sCT system comprises an array of miniature carbon nanotube X-ray sources and a detector array strategically positioned in the gaps between sources. To …
Automatic identification of radioactive isotopes through energy spectrum analysis is vital for remote, unmanned monitoring of radioactive contamination and rapid early warning. In recent years, deep learning methods have advanced significantly, outperforming traditional approaches in recognition acc…
To assess the structural safety of the graphite core in gas-cooled microreactors and obtain the stress state of core graphite components under seismic excitation, this study compared acceleration and velocity curves from small-scale graphite block collision experiments with simulation results. It wa…
Cosmic-ray muon sources exhibit distinct scattering angle distributions when interacting with materials of different atomic numbers (Z values), facilitating the identification of various Z-class materials, particularly those radioactive high-Z nuclear elements. Most of the traditional identification…
Cancer is the second leading cause of mortality globally. As a critical technological approach in oncology treatment, radiation therapy includes conventional dose rate radiation therapy, high dose rate radiotherapy and ultra-high dose rate radiation therapy (FLASH-RT). With the significant escalatio…
We studied the energy partition between two well-separated fission fragments associated with the partition of nucleons owing to quantum entanglement. This is different from most fission models that invoke an explicit statistical partition of excitation energies. The dynamical fission evolution is de…
The presence of hydrogen will affect the formation of irradiation defects in reactor structural materials, which in turn will influence the degradation of their mechanical properties. A deeper understanding of the mechanisms behind irradiation effects in structural materials in the presence of hydro…
The deep inelastic collision process of the $^{18}\text{O}+^{238}\text{U}$ system at an incident energy of 8.5 MeV/u was investigated using the Improved Quantum Molecular Dynamics (ImQMD) model coupled with the GEMINI++ statistical decay model. By analyzing the total kinetic energy-mass distribution…
The ultrahigh-energy-resolution soft X-ray beamline, "Dreamline," at the Shanghai Synchrotron Radiation Facility (SSRF), has been successfully constructed and is now fully operational for conducting angle-resolved photoemission spectroscopy (ARPES) and photoelectron emission microscopy (PEEM) experi…
Benchmark experiments are indispensable for the development of neutron nuclear data evaluation libraries. Given the lack of domestic benchmarking of nuclear data in the fission energy region, this study developed a neutron leakage spectrum measurement system using a spherical sample based on the 252…
As a key instrument for measuring core neutron flux, the signal current of self-powered neutron detectors (SPND) changes due to continuous material burnup. Accurate consideration of the long-term evolution of SPND signals is crucial for reliable power monitoring and safe reactor operation. This stud…
We analyze DESI DR2 data with a model-independent method and find that: (a) the expansion of the universe may speed up with a confidence level more than 2.3 $\sigma$ at redshift $z_{51}\in (0.51, 0.955)$; (b) the expansion of the universe may speed down with a confidence level greater than 1.7 $\sig…
We present the preparation and measurement of the radioactive isotope $\rm ^{37}Ar$, which was produced using thermal neutrons from a reactor, as a calibration source for liquid xenon time projection chambers. $\rm ^{37}Ar$ is a low-energy calibration source with a half-life of 35.01 days, making it…
Unlike the structural characteristics of conventional single-focus X-ray tubes, the radiation protection and shielding design of distributed multi-focus X-ray tubes requires targeted research. This paper employs Monte Carlo simulation methods to model and investigate the radiation field and shieldin…
Tungsten is a commonly used shielding material in Sr-90 radioisotope thermoelectric generators, but it exhibits poor high-temperature oxidation resistance. To enhance its oxidation resistance under high-temperature operating conditions, this study fabricated a nickel-chromium composite coating on tu…
The environmental compatibility of structural materials in liquid lead-bismuth is a bottleneck restricting the development and construction of lead-cooled fast reactors. 9-12Cr ferritic-martensitic steels and austenitic stainless steels are preferred candidate materials for key equipment in lead-coo…
Background: The nitrate natural circulation loop (NNCL) is an important experimental platform for investigating the natural circulation characteristics of molten salt. Through numerical simulation and parameter sensitivity analysis of the nitrate natural circulation loop (NNCL), this study deepens t…
Detector and event visualization are crucial components of high-energy physics (HEP) experimental software. Virtual Reality (VR) technologies and multimedia development platforms such as Unity offer enhanced display effects and flexible extensibility for visualization in HEP experiments. In this stu…
This study investigates the effects of varying tritium breeding materials and their lithium enrichment rates on the Tritium Breeding Ratio (TBR) and Energy Multiplication Factor (M) within the tritium breeding zone of a fusion reactor. The magnetic fusion reactor model was developed based on the geo…
In this study, the neutron radiative capture cross section of 93Nb was measured using the GTAF gamma spectrometer at the Back-n beamline of the China Spallation Neutron Source (CSNS), employing the time-of-flight (TOF) method. A comprehensive data processing approach was implemented, including backg…
To calculate the detection efficiency curve and coincidence correction factors for well-type HPGe, the detection efficiency of HPGe was calibrated using commonly employed monoenergetic γ-ray nuclide standard sources, while simultaneously measuring the cascade coincidence correction factors for commo…
This paper presents an algorithm that combines track finding and track fitting, designed for track reconstruction in the Electron-ion Collider in China (EicC). The algorithm's goal is to fulfill the criterion of high track reconstruction efficiency. The algorithm is modularly constructed, leveraging…
High-energy neutron-induced fission data for actinide nuclides form the foundation for the design of advanced nuclear energy systems such as accelerator-driven subcritical systems and fast neutron reactors, playing a vital role in their development. In this study, the INCL++ code is utilized to calc…
To address the well-known "resolution-photon efficiency" trade-off, we developed a lens-coupled X-ray tube-based indirect imaging system incorporating a thick scintillator plate and a large numerical aperture (NA) lens. This configuration provides sufficient photon flux while maintaining theoretical…
Within the framework of the dinuclear system (DNS) model by implementing the cluster transfer into the dissipation process, we systematically investigated the energy spectra and the angular distribution of the preequilibrium clusters (n, p, d, t, $^{3}$He, $\alpha$, $^{6,7}$Li, $^{8,9}$Be) in the ma…
The steam turbine is one of the most critical energy conversion components in power generation systems. Unlike thermal power plants, nuclear steam turbines operate in the wet steam region in most of their stages, with the inlet steam often near saturation, resulting in more severe non-equilibrium co…
For the prompt monitoring of radionuclides released into the atmosphere by various nuclear facilities and sudden nuclear accidents, a nonsampling atmospheric radionuclide online measurement system (NSAROMS) that is based on NaI(Tl) scintillators was developed. Compared with traditional measurement m…
The TM020 mode damped cavity enables compact accelerators but suffers from severe electromagnetic field leakage due to coupling-slot misalignment and structural asymmetry. We propose an integrated narrowband filter based on RLC circuit design to selectively suppress TM020 leakage while preserving hi…
While traditional gamma-gamma density (GGD) logging technology is widely utilized, its potential environmental risks have prompted the development of more environmentally friendly neutron-gamma density (NGD) logging technology. However, NGD measurements are influenced by both neutron and gamma radia…
The Shanghai Proton Therapy Device (SAPT) is the first domestic proton therapy demonstration system. The rotating gantry constitutes a critical component of the proton therapy apparatus, achieving an isocentric accuracy of ±0.275 mm that surpasses international mainstream equipment, thereby requirin…
We present a new method for structural sequence analysis grounded in Algorithmic Information Theory (AIT). At its core is the Ladderpath approach, which extracts nested and hierarchical relationships among repeated substructures in linguistic sequences---an instantiation of AIT’s principle of descri…
