Most papers are machine-translated to English; some are originally in English.
Showing 50 of 142 papers in Nuclear Physics
The energy correlation between prompt fission neutrons has not yet been fully considered in coincidence measurement and multiplicity measurement techniques. To accurately measure and systematically verify this correlation characteristic, this project conducted a specialized experiment lasting approx…
In nuclear decommissioning scenarios, the distribution of radiation doses is typically unknown. To understand the current radiation status during monitoring tasks at nuclear decommissioning facilities, it is crucial to generate continuous and visualized radiation dose distribution images. Convention…
Traditional liquid scintillation measurement instruments face challenges in field measurements of radon in water: their bulky size and reliance on a stable power supply hinder the on-site analysis of large numbers of water samples. To address this, the study aims to develop a portable liquid scintil…
The Jiangmen Underground Neutrino Observatory (JUNO), a 20~ktons low-background Liquid Scintillator detector (LS), was primarily designed to determine the neutrino mass ordering. JUNO requires UltraPure Water (UPW) with a $^{226}$Ra concentration $<$50~$\mu$Bq/m$^3$ due to the direct liquid-liquid c…
The neutron-rich nucleus 22C, located at the neutron dripline, exhibits intriguing structural properties, such as its Borromean nature and potential two-neutron halo configuration. Despite experimental advancements, uncertainties persist in the energy of two-neutron separation S2n and the radius of …
Transmission neutron spectra from a pure 238U slab sample (dimensions: 100 mm × 100 mm × 20 mm) bombarded by broad-spectrum neutrons were measured at 0° using the time-of-flight method. The experiment was carried out at the Radioactive Ion Beam Line of the Heavy Ion Research Facility in Lanzhou at t…
Cosmogenic muon-induced radioactive isotopes pose a significant background source for deep-underground low-background experiments. Although rock overburdens at underground sites substantially attenuate the cosmogenic muon flux, residual muon-induced backgrounds still require active suppression. For …
Three-quasiparticle K-isomeric states in odd-mass N=106 isotones within the A~180 mass region are systematically investigated using configuration-constrained potential energy surface calculations. The calculations successfully reproduce the excitation energies and deformations of known high-K isomer…
On-chip particle accelerators, especially dielectric laser accelerators utilizing the inverse Cherenkov effect (ICR-DLAs), show great potential for next-generation compact applications. However, single-sided laser-driven ICR-DLAs suffer from two key drawbacks: (1) The achievable acceleration gradien…
Very Large Area gamma-ray Space Telescope (VLAST) is the next-generation flagship space observatory for high-energy gamma-ray detection proposed by China. The observation energy range covers from MeV to TeV and beyond, with acceptance of 10 m^2sr. The calorimeter serves as a crucial subdetector of V…
To assess the steam generator tube rupture (SGTR) accident scenario under compromised safety systems (e.g., post-earthquake conditions), as specified in the OECD/NEA/CSNI International Standard Problem (ISP) No. 52 project, a full-scale facility model was developed using the RELAP5 thermal-hydraulic…
The irradiation response of pure and nitrogen-doped 6H-SiC single crystal was investigated after low-fluence neutron irradiation at 30~60°C. Internal Friction, X-Ray Diffraction, Raman spectroscopy and Transmission Electron Microscopy were used to study the microstructural changes. Neutron irradiati…
The uniform distribution of U3O8 particles within an aluminum matrix is crucial for the optimal performance and safety of plate-type nuclear fuel produced by the dispersion technique. X-ray radiography is one of the methods employed to inspect the homogeneity of U3O8-Al dispersion fuel plates. This …
This study constructs a hybrid module with a multi-material collaborative detection architecture by integrating silicon pixel layers into the longitudinally segmented scintillating fiber sampling calorimeter module and optimizes the placement of the silicon layers. The module utilizes the pre-shower…
The mechanism and the observables (including cross section, angular distribution, energy spectrum and double-differential cross section) for the p+$^{28}$Si reaction below incident energy 200 MeV are systematically studied. A set of optimal global optical potential parameters for proton is obtained …
Massive stars are significant sites for the weak s-process (ws-process). 22Ne and 16O are, respectively, the main neutron source and poison for the ws-process. In the metal-poor stars, the abundance of 22Ne is limited by the metallicity, so that the contribution of 22Ne(α, n)25Mg reaction on the s-p…
Production of pulsed neutron sources from petawatt-class femtosecond laser interacting with pitcher-catcher target is studied by comprehensively using radiation hydrodynamic, particle-in-cell and monte-carlo simulations. We find that the preplasma from the ablation of laser prepulse is beneficial fo…
This study explores the performance of Ice Bed Condensers (IBC) in controlling hydrogenrelated hazards during severe accident progression in PWR reactor under a prolonged Station Blackout (SBO) scenario. Simulations using MELCOR 1.8.6 reveal that during the in-vessel phase, zircaloy oxidation begins…
Aerial survey is a dynamic and continuous process, and variations in ground elevation within the survey area lead to issues such as overlapping measurement zones and inaccurate altitude correction during the survey process. Commonly used terrain correction methods are based on the concept of finite …
To address issues such as radiation exposure risks and limited experimental flexibility inherent in traditional nuclear experiments relying on radioactive sources, this study proposes a high-safety analog nuclear signal generator based on an FPGA (Field Programmable Gate Array) and DAC (digital-to-a…
The Southern Advanced Photon Source (SAPS) is a diffraction-limited synchrotron light source under design, which employs longitudinal injection as its primary injection scheme. This kind of injection scheme requires that the injected beam has a short bunch length and low emittance, and the preferred…
The mirror energy difference (MED) of the mirror state, especially for states bearing the Thomas-Ehrman shift, serves as a sensitive probe of isospin symmetry breaking. We employ the Gamow shell model, which includes the inter-nucleon correlation and continuum coupling, to investigate the MED for $s…
This work presents a detailed, benchmarked evaluation of the reactivity worth of top beryllium shim plates in the Nigerian Research Reactor-1 (NIRR-1) following conversion from highenriched uranium (HEU) to low-enriched uranium (LEU) fuel. Multigroup cross sections were generated with WIMS-ANL and c…
We present the results of an experiment conducted to measure cosmic-ray muons and muon-induced fluxes at the China Jinping Underground Laboratory. Utilizing a 28-liter 0.5% gadolinium-doped liquid scintillator detector, which operated stably for 412 days in a 1-meter-thick polyethylene shielding, we…
Muon scattering tomography utilizes the penetrating ability of cosmic ray muons for non-destructive detection of materials inside shielding layers, with applications in geophysical exploration and homeland security. Trajectory reconstruction is essential for muon scattering tomography. High-precisio…
This paper proposes a novel nuclear reaction mechanism—Quantum Gravity Modulated Neutron Superfluid Reaction (QGM-NSR). This mechanism hypothesizes that strong gravitational fields (for example, gravitational fields simulated in high-energy accelerators or inside neutron stars) induce a neutron supe…
The technique of Bρ-defined isochronous mass spectrometry (Bρ-IMS), established at a storage ring, serves as a valuable tool for determining the masses of short-lived nuclei. In the previous Bρ-IMS experiments, the effects of magnetic field drifts have to be corrected in order to improve the mass re…
In high-energy physics~(HEP) experiments, visualization software plays a pivotal role in detector design, offline software development, and event data analysis. The visualization tools integrate detailed detector geometry with complex event data models, providing the researchers with invaluable insi…
The anisotropic diffusion of irradiation defects in α-uranium (α-U) has been investigated using classical and nonequilibrium molecular dynamics methods, with the aim of better understanding the complex response of the microstructure to irradiation damage, which depends on temperature and internal st…
Accurate measurement of the activities of α/β radionuclides in environmental samples is critical for environmental radiation monitoring. Traditional α/β discrimination methods for dualscintillator detectors primarily rely on the amplitude, width, and rise time of the pulse from the detector, often l…
The next-generation Molten Salt Reactor (MSR) utilizes a liquid-fuel system, in which fissile material is dissolved in high-temperature molten salts. This dual-purpose medium acts as both fuel and primary coolant, offering exceptional thermal stability and inherent safety features. However, MSR pose…
To bridge the theoretical gap in the analysis of neutron flux density distributions within annular reactors, this study derives closed-form solutions for the neutron flux density under critical conditions based on the monoenergetic neutron diffusion equation and validates them using MCNP5 simulation…
Neutron CT imaging offers unique advantages in metal defect detection and cultural relic analysis, particularly for exploring internal structures of ancient artifacts like writing knives, due to its high penetrability and hydrogen sensitivity. Accurate segmentation of its images is critical for defe…
X-ray and neutron computed tomography (CT) are widely used for non-destructive characterization of internal structures. Their distinct contrast mechanisms, arised from different interactions with matter, can enhance structural analysis when combined. Dual-modality imaging integrating both techniques…
Objective: As the primary functional component of a fusion reactor, the fusion blanket pebble bed, composed of numerous particles, is crucial for tritium breeding, neutron multiplication, and radiation shielding. Particles within tritium-breeding pebble beds are subjected to prolonged neutron irradi…
Polarization-analyzed small-angle neutron scattering (PASANS) is an advanced technique that enables the selective investigation of magnetic scattering phenomena in magnetic materials and distinguishing coherent scattering obscured by an incoherent background, making it particularly valuable for cutt…
Abstract: For radioactive source localization, traditional Compton cameras are limited by the imaging field of view and low detection efficiency, resulting in slow response in complex environments. To address the limitations in the azimuthal sensitivity of conventional dual-layer scintillator detect…
The initial collision geometry, including the reaction plane, is crucial for interpreting collective phenomena in relativistic heavy-ion collisions, yet it remains experimentally inaccessible through conventional measurements. Recent studies propose utilizing photon-induced processes as a direct pro…
This study investigates the synergistic effects of cryogenic temperatures and radiation exposure on aerospace components. Test chips were fabricated using a sub-20 nm bulk silicon FinFET process, primarily comprising ring oscillators and bandgap reference (BGR) circuits that incorporate parasitic ve…
In the High Energy FRagment Separator (HFRS) at the High Intensity heavy-ion Accelerator Facility, plastic scintillation detectors are used for high-precision time-of-flight (ToF) measurements to identify the secondary ions from the reaction between the primary beam and the target. During the day-on…
In this study, a compact X-band dual-mode electron linear accelerator (linac) was developed for medical radiotherapy applications, which is capable of generating both 100 mA / 6 MeV beams for X-ray radiotherapy (low-energy mode) and 10 mA / 13.5 MeV beams for electron radiotherapy (high-energy mode)…
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 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…
Understanding the long-term behavior of spent nuclear fuel (SNF) is crucial for safe radioactive waste management. This study evaluates how burn-up, sintering temperature, and leaching temperature impact the leaching and microstructural stability of SIMulated FUEL (SIMFUEL) pellets designed to simul…
A methodology based on low energy photon spectrometry with a silicon drift detector (SDD) is developed for the determination of 235U/238U atom ratio in uranium samples. The SDD is well suited for measuring low energy photons emitted from thin uranium sample source with low self-absorption. The main …
This work presents the preparation and measurement results of the radioactive isotope ³⁷Ar, which is produced using reactor thermal neutrons and serves as a low-energy calibration source for liquid xenon time projection chambers. With a half-life of 35.01 days and low energy, ³⁷Ar is an ideal choice…
A silicon microstrip detector (SSD) has been developed to have state of the art spatial resolution and a large sensitive area under stringent power constraints. The design incorporates three floating strips with their bias resistors inserted between two aluminum readout strips. Beam test measurement…
Maximizing beam energy deposition requires capturing the entire ion population within a single short-duration bunch to achieve peak power. Using the typical beam 238 U 35+ in the Booster Ring (BRing) at the High Intensity Heavy-Ion Accelerator Facility (HIAF) as an example, we systematically analyze…
For controlled nuclear fusion, it is of significance to develop a comprehensive simulation environment for Inertial Confinement Fusion(ICF) . This environment must accurately calculate the energy loss of charged particles in high-temperature, high-density plasma, and simulate the physical parameters…
The muonium to antimuonium conversion research would be enhanced by an intense pulsed muon source. However, the high intensity muon source induces high pile-up rate in the detector system and reduces the total efficiency. Here we propose a Low Gain Avalanche Detector (LGAD)-based system to search fo…
