Most papers are machine-translated to English; some are originally in English.
Showing 50 of 313 papers in Physics
Pre-oxidation is a critical step in the preparation of polyacrylonitrile-based (PAN) carbon fibers, and gamma irradiation represents an effective approach for optimizing the thermal pre-oxidation process. However, the effects and underlying mechanisms of gamma irradiation and thermal treatment seque…
CANDLE reactors are a type of fast reactor that burn depleted uranium or natural uranium without chemical reprocessing. One of the crucial challenges in practice is high material radiation damage for the CANDLE reactor. The Double Solitary Waves Reactor (DSWR), with double separated ignition zones, …
To satisfy the teaching and research demands for reactors in general universities, point reactor neutron kinetics, xenon and samarium poisoning, temperature feedback, and lumped-parameter thermal-hydraulic dynamic models for TRIGA (Training, Research, Isotopes, General Atomic) reactors—primarily uti…
Boron neutron capture therapy (BNCT) is an advanced targeted radiotherapy that exploits the high affinity of the 10B nucleus for capturing neutrons. This therapy involves the use of neutron beams in combination with boron compounds, which preferentially accumulate in cancer cells. Recent advancement…
Liquid metal heat pipes are important thermal conductive components for space exploration vehicles, exhibiting excellent heat transfer capabilities and isothermal performance. However, during space exploration missions, sodium heat pipes may operate under conditions below or even far below the desig…
To mitigate dark pulses and achieve low-background-level measurements, liquid scintillation counters (LSCs) are generally equipped with two or three photomultiplier tubes (PMTs) for coincidence measurements. However, traditional identification methods in LSC only utilize the anode pulse from a singl…
Accurate velocity determination of stored ions in storage rings plays a key role for nuclear mass measurements using the technique of B$\rho$-defined isochronous mass spectrometry (Bρ-IMS). However, the accuracy and precision of the ion's velocity are seriously deteriorated by the non-isochonicity o…
Accurate calibration of the beam phase (the phase of beam arrival relative to the cavity accelerating field) is essential for maintaining the stability and efficiency of linear accelerators. Conventional offline phase-scan methods, typically performed during commissioning or maintenance, require con…
In current work, the fission property of $^{180}$Hg is investigated based on the Skyrme density functional theory (DFT). The impact of the high-order hexadecapole moment (q${40}$) is found at large deformations. With the q$$Hg is further reproduced by the time-dependent generator coordinate method (…
Leakage 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 the In…
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…
As the key technology of space exploration, space power has always been a research interest of international researchers. A lot of research work has been carried out around the world for the space nuclear reactor using heat pipe, liquid metal and gas cooling method. With the development of molten sa…
A new Monte Carlo optimization (MCO) method named Hybrid Adaptive Response Surface Methodology Genetic Algorithm (RSM-GA) Monte Carlo Optimization (HRG-MCO) is proposed to address the strong empirical dependence and low efficiency of global multi-parameter optimization in traditional neutronics desi…
The focusing of pulsed neutrons can increase neutron flux, reduce sample volume, and enable access to smaller scattering angles. Consequently, it represents a critical challenge for next-generation spallation neutron sources. The primary difficulty stems from the inherent chromatic aberration of whi…
Due to its excellent heat transfer performance and compact structure, the printed circuit heat exchanger (PCHE) has become the mainstream heat exchange equipment between the secondary circuit of the supercritical carbon dioxide Brayton cycle and the primary circuit of the lead-cooled fast reactor. D…
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…
Cs2LiYCl6: Ce (CLYC) scintillator is sensitive to neutrons within a wide-energy range and has the potential to achieve wide-range neutron energy spectrum measurements. The direct neutron detection performance of a CLYC detector has been realized by utilizing the Back-n white neutron source at China …
This study investigates neutron differential scattering cross sections off even Gadolinium isotopes (Gd-156, Gd-158, Gd-160) at various energies (1.5, 2.5, 4.1 and 7 MeV), comparing theoretical calculations with evaluations from prominent nuclear data libraries (ENDF/B-VIII.0, JENDL-5 and EXFOR) and…
For over six decades, the violation of parity symmetry has been treated as a foundational fact of modern physics. This article re-examines that conclusion and argues that parity was never violated—because it was never physically there to begin with. Through a structural analysis of the 1957 Wu exper…
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…
The PandaX-4T liquid xenon detector uses Hamamatsu 3-inch R11410-23 photomultiplier tubes (PMTs) as the light sensors for ultra-low radioactivity, high quantum efficiency, and long-term stability at cryogenic temperature. Each PMT was thoroughly tested in a dedicated chamber before being installed i…
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…
In the synthesis of new superheavy nuclei, the various long half-lives of Pu and Cm isotopes render them promising as target materials for the fusion reactions. An investigation into the isotopic dependence of the actinide targets is important to select optimal reaction systems. Based on the dinucle…
Based on the Generalized reduced R-matrix theory, the RAC program (R-matrix analysis code) is used to analyze the experimental data of all the nuclear reaction channels related to the 5He system. The current calculations provide accurate and reliable evaluation data, and are in good agreement with t…
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…
Cryogenic modules are key equipment systems in SHINE. To achieve a high quality factor Q0 for the superconducting cavities in cryogenic modules, it is essential to create a low-magnetic-field operating environment. Efficient magnetic shielding for superconducting cavities effectively shields against…
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…
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…
Spot-scanning carbon ion radiotherapy relies on ripple filters (RiFi) to enhance treatment efficiency. Existing multi-layer metallic mesh ripple filters (mRiFi) employ random stacking configurations, resulting in poor dose distribution consistency. This study designed three-dimensional mRiFi matrice…
The Shanghai High repetition rate XFEL and Extreme light facility (SHINE) utilizes high-Q 1.3 GHz superconducting radio-frequency (SRF) cavities for particle acceleration. These cavities, with an ultra-narrow bandwidth of approximately 32 Hz, are highly susceptible to Lorentz force detuning (LFD) an…
Due to its excellent heat transfer performance and compact structure, the printed circuit heat exchanger (PCHE) has become the mainstream heat exchange equipment between the secondary circuit of the supercritical carbon dioxide Brayton cycle and the primary circuit of the lead-cooled fast reactor. D…
The High Energy Fragment Separator (HFRS), which is currently under construction, is a leading international radioactive beam device. Multiple sets of position-sensitive Twin Time Projection Chamber (TPC)detectors are distributed on HFRS for particle identification and beam monitoring. The twin TPCs…
The 28nm process has a high cost-performance ratio and has gradually become the standard for the fieldof radiation-hardened devices. However, owing to the minimum physical gate length of only 35nm, the physicalarea of a standard 6T SRAM unit is approximately 0.16 μm2, resulting in a significant enha…
This paper demonstrates, through experiments on the relative motion of coils and magnets and through case analyses of numerous electromagnetic interactions, that Weber's original viewpoint on unipolar induction is correct. Furthermore, the experimental analysis also indicates that, compared with the…
The helium bubbles induced by 14 MeV neutron irradiation can cause intergranular fractures in reduced activation ferritic martensitic (RAFM) steel, which is a candidate structural material for fusion reactors. In order to elucidate the susceptibility of different grain boundaries (GBs) to helium-ind…
The Veto detector of the external target facility (ETF) at the Heavy Ion Research Facility in Lanzhou - Cooling Storage Ring (HIRFL-CSR) was calibrated using cosmic rays. The calibration work was primarily divided into two components: position calibration and time calibration. Position calibration y…
The yield ratios of neutron-proton (R(n/p)) and 3H-3He (R(3H/3He)) with reduced rapidity from 0 to 0.5 were simulated for 50 MeV/u even-even 36-56Ca + 40Ca, even-even 48-78Ni + 58Ni and 100-139Sn (every third isotopes) + 112Sn at full reduced impact parameters using the isospin-dependent quantum mol…
Gas X-ray polarimetry refers to a class of detectors designed for measuring soft X-ray polarization. Systematic effects inherent to these detectors introduce residual modulation, resulting in systematic bias in the detected polarization of sources. This work discusses these systematic effects and th…
By the Skyrme density functional theory (DFT), potential energy surfaces (PES) of $^{240}$Pu with constraints on the axial quadrupole and octupole deformations($q_{20}$ and $q_{30}$) are calculated.The volume-like, and the surface-like pairing forces, and the mixing between these two forces are used…
The synergistic damage effect of irradiation and corrosion of reactor structural materials has been a prominent research focus. This paper provides a comprehensive review of the synergistic effects on the third- and fourth-generation fission nuclear energy structural materials used in pressurized wa…
In this paper, the analytic necessary and sufficient conditions are obtained for the CP-conserving two-Higgs-doublet potential to be bounded from below using the co-positivity of tensors. This is achieved by treating the potential as a quartic homogeneous polynomial in the moduli of the two Higgs do…
This paper focuses on exploring the physical logic of the relativity principle in particle dynamics. Through causal analysis of dynamics, it is found that the reason why Newton's second law suffers from difficulties regarding inertial frames and inertial forces is fundamentally due to the neglect of…
The paper proposes a statistical fields theory of quantum reference frame underlying the Perelman's analogies between his formalism of the Ricci flow and the thermodynamics. The theory is based on a $d=4-\epsilon$ quantum non-linear sigma model (NLSM), interpreted as a quantum reference frame system…
Nuclear material license holders should develop a nuclear material accounting management system and achieve closed material balance. According to regulatory requirements, the implementation of nuclear material accountancy is based on physical inventory and material measurements. Generally, spent fue…
A dilation X-ray detector (DIXD) based on time dilation and microchannel plate (MCP) gated technology has been reported. The DIXD passes a driving pulse along the transmission photocathode (PC) to obtain a dilated electron signal and finally achieves a high time resolution of 12 ps. Furthermore, the…
This study investigates the application technology of near-ultraviolet femtosecond laser pulse inscription inside polymethylpentene. We discovered that this thermoplastic material exhibits polarization-sensitive characteristics. First, inscription experiments employed a lens with a numerical apertur…
Strain engineering of 2D materials is capable of tuning the electrical and optical properties of the materials without introducing additional atoms. However, there are still great challenges in realizing straining of 2D materials with CMOS compatibility. Here, a method for large-scale ultrafast stra…
The introduction of non-Hermiticity extends concepts in traditional Hermitian quantum systems and induces many novel physical phenomena, such as the non-Hermitian skin effect unique to non-Hermitian systems, which has made the simulation of non-Hermitian quantum models a focus of attention. Compared…
Grassland is an important type of terrestrial ecosystem, and grassland ecosystem health assessment constitutes a crucial component of grassland health research in arid regions. Xinjiang is located in the Central Asian arid region, where the natural grasslands nurtured by the typical "mountain-basin"…
Configurational information entropy (CIE) theory was employed to determine the neutron skin thickness of neutron-rich calcium isotopes. The nuclear density distributions and fragment cross-sections in 350 MeV/u 40-60Ca + 9Be projectile fragmentation reactions were calculated using a modified statist…
