Most papers are machine-translated to English; some are originally in English.
Showing 50 of 313 papers in Physics
To address the well-known "resolution–photon efficiency" trade-off, we developed a lens-coupled X-ray tube-based indirect imaging system that incorporated a thick scintillator plate and lens with a large numerical aperture. This configuration provided sufficient photon flux while maintaining a theor…
In this study, we compared analytical and machine learning models for two-dimensional nondestructive localization of radioactive sources within a simulated waste drum. A 60Co gamma source was located at 72 different positions within the simulated drum. A reflector-coated liquid light guide (LLG) sys…
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…
Abstract：As a novel mobile nuclear power supply, the gas-cooled microreactor (GMR) has important application value in power supply in remote areas and microgrids. However, under typical fault scenarios such as reactivity disturbance, precooler/intercooler flow loss, and main circuit helium leakage, …
Proton capture reactions from silicon to phosphorus play a crucial role in hydrogen burning during nova explosions. However, experimental measurements of reactions involving radioactive isotopes or extremely short-lived nuclei are exceptionally challenging. Calculating the spectroscopic factors for …
Physical space is the only medium for light propagation; air, water, glass, etc., are not. Atomic nuclei within these “medium” curve the surrounding physical space, causing photons to follow curved trajectories at the microscopic level during propagation. Meanwhile, the light speed (magnitude) remai…
According to Planck’s law, the energy density for photons with radiation frequency $f$ is based on the assumption that the photons’ frequency has a continuous distribution, with an infinitesimal frequency interval $df$ approaching zero. By integrating over the continuous frequencies, the energy dens…
Gamma-ray imaging plays a crucial role in source-term monitoring and consequence management of nuclear power plants. These applications typically involve mapping of spatial radiation distributions consisting of various isotopes. This requires the imaging equipment to achieve not only an 4π field-of-…
Induction heating is an indispensable non-contact heat source for advanced thermal manufacturing and in-situ high-temperature characterization, yet conventional low-/mid-frequency systems suffer from large skin depth and diffuse energy deposition, resulting in sluggish heating that fails to meet the…
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…
The High Energy Photon Source (HEPS) is a high-performance and high-energy synchrotron radiation light source with a beam energy of 6 GeV and an ultra-low emittance of 34 pm·rad. In order to enable users to fully harness the potential of this high-brightness beam, it is essential to maintain the sta…
In the study of beam dynamics for high-intensity linear accelerators, 3D multi-particle simulations based on the particle-in-cell (PIC) algorithm are necessary due to numerous nonlinear effects caused by strong space charge effects. However, since such simulations require a large amount of computati…
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 …
Stochastic vibration in nuclear power plants can amplify cyclic stress, vibratory displacement, and velocity response of straight fluid-conveying pipes in the primary loop. To address this, a stochastic-vibration mathematical model for clamped-clamped straight pipes under stochastic excitation is es…
The high-order deformation effects in even-even 246,248No are investigated by means of pairing self-consistent Woods-Saxon-Strutinsky calculations using the potential-energy-surface (PES) approach in an ex-tended deformation space (β2, β3, β4, β5, β6, β7, β8). Based on the calculated two-dimensional…
Light nuclei collective flow is an important probe for understanding their production mechanisms in heavy-ion collisions. The STAR collaboration has reported that the atomic mass number (A) scaling of light nuclei elliptic flow v2 is broken at $\sqrt{s_{NN}} = 3.0-3.9$ GeV. The observations reveals …
The Super Tau-Charm Facility (STCF) is a next-generation electron-positron collider being developed in China, designed to achieve a peak luminosity exceeding 5×10^34 cm^(-2) s^(-1) at the optimal beam energy of 2 GeV. Achieving this goal relies on a crab-waist collision scheme with a large crossing …
High-altitude intense pulsed $\gamma$-rays propagate through the upper atmosphere to generate intense radiation fields, which can lead to performance degradation or functional failure of electronic systems in orbiting spacecraft. By employing the Monte Carlo method combined with variance reduction t…
The simultaneous quantification of actinides and nitric acids in nuclear fuel reprocessing is critical, yet conventional absorption spectroscopy faces a fundamental limitation: its reliance on a single, fixed optical path length, which forces a compromise between sensitivity and dynamic range for mu…
A Frequency Modulated Continues Wave (FMCW) reflectometry with heterodyne detec- tion regime is developed for measuring the electron density profile in front of the ICRH antenna in Wendelstein 7-X (W7-X). The dual-band set up consists of the one at E-band (60GHz-90GHz) and another at W-band (75GHz-1…
X-ray absorption fine structure (XAFS) is an important structural analysis technique widely used to study the oxidation states, coordination environments, and neighboring atomic characteristics of amorphous materials and disordered systems. However, due to the complexity of XAFS spectra, their inter…
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…
Cryomodules are key systems in SHINE. To achieve a high quality factor Q0 for the superconducting cavities in cryomodules, it is essential to provide a weak magnetic field operating environment. Efficient magnetic shielding for superconducting cavities effectively shields against background magnetic…
Based on collisions between the 100 PW laser and 8 GeV superconducting linear accelerator constructing in Shanghai High Repetition Rate X-ray Free Electron Laser and Extreme Light Facility, the building of GeV-level γ-ray as well as positron beams are proposed according to particle-in-cell simulatio…
Recent investigations suggest that in a fourth-generation light source, where both fundamental-frequency andharmonic RF cavities are commonly used for bunch lengthening, variations in radiation energy loss per turn (U0)could cause a significant change in bunch length. It is necessary to compensate f…
Computed tomography (CT) is an indispensable tool in clinical diagnosis. Nevertheless, it also involves non-negligible risks due to exposure to ionizing radiation. To accurately evaluate the radiation dose received by Chinese adults during CT examinations, we analyze the relationships between body s…
The Circular Electron Positron Collider (CEPC) is a next-generation electron–positron collider proposed for the precise measurement of the properties of the Higgs boson. To emphasize boson separation and jet reconstruction, the baseline design of the CEPC detector was guided by the particle flow alg…
The user wants me to translate a scientific text from Simplified Chinese to English. However, the text provided is already in English. Let me re-read the instructions carefully. The instructions say: "Translate from Simplified Chinese to English with the highest accuracy and academic tone." But the …
The Ge-doped GaNb4Se8 polycrystalline samples were synthesized by solid-state reaction method. Zero resistance transitions were observed in one batch of samples with the highest onset superconducting Tc at 45 K. This discovery may demonstrate a new class of Nb-based high-Tc superconductors arising f…
As the core guarantee for the performance of large-scale scientific facilities, particle accelerator alignment technology aims to achieve high-precision spatial positioning of critical components such as magnets. The leap in alignment precision from sub-millimeter to sub-micron and even nanometer le…
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…
We report an intriguing Poynting vortex street produced by 3D vectorial superposition of two counterpropagating modes in different mode orders on silicon-based waveguides. Importantly, this Poynting vortex street can produce composite topological textures characterized by spin skyrmion (bimeron) arr…
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 …
It is widely accepted that neutrino oscillation implies a non-zero mass for neutrinos. However, to date, no other conclusive experimental evidence has definitively confirmed their mass. If neutrino oscillations originate from the intrinsic properties of neutrinos themselves, then postulating that ne…
When the operating temperature of a Solid Oxide Electrolysis Cell (SOEC) is lower than the outlet temperature of a nuclear reactor, the reactor can be directly coupled with the SOEC as a high-temperature heat source. However, the key to the efficiency and return on investment of this hybrid energy s…
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 …
Consciousness is considered the most challenging problem in the science of the mind, especially Chalmers' hard problem. From the standpoint of systems science philosophy, many consciousness theories overlook the structure-function correlation principle, thereby reducing their explanatory power regar…
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…
