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Detector array with digital data acquisition system for charged-particle decay studies

Nuclear Science and Techniques 2025年第4期36卷 140-150页

作者： Hao Jian Xin-Xing Xu Kai-Long Wang Jia-Jian Liu Chao-Yi Fu Peng-Jie Li Yan-Yun Yang Guang-Xin Zhang Kang Wang Fang-Fang Duan Long-Hui Ru Guang-Shun Li Bing Ding Yun-Hua Qiang Cen-Xi Yuan Jun-Bing Ma Shi-Wei Xu Yu-Feng Gao Rui Fan Fan-Chao Dai Si-Xian Zha Hao-Fan Zhu Jin-Hai Li Shu-Lian Qin Zhi-Fang Chang Cheng Kong He-Xuan Yan Hao-Wei Xu Jia-Long Ning Bo-Ren Liu Jie Zhou Yu-Dong Chen Bo-Shuai Cai Yu-Ting Wang Hong-Yi Wu Zhi-Xuan Wang Dong-Sheng Hou Hu-Shan Xu Xiao-Hong Zhou Yu-Hu Zhang Meng Wang Zheng-Guo Hu Jenny Lee State Key Laboratory of Heavy Ion Science and Technology Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516003China Department of Physics The University of Hong KongHong KongChina Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Institute of Particle and Nuclear Physics Henan Normal UniversityXinxiang 453007China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China

A state-of-the-art detector array with a digital data acquisition system has been developed for charged-particle decay studies,includingβ-delayed protons,αdecay,and direct proton emissions from exotic proton-rich *** digital data acquisition system enables precise synchronization and processing of complex signals from various detectors,such as plastic scintillators,silicon detectors,and germaniumγ*** system's performance was evaluated using theβdecay of^(32)Ar and its neighboring nuclei,produced via projectile fragmentation at the first Radioactive Ion Beam Line in Lanzhou(RIBLL1).key measurements,including the half-life,charged-particle spectrum,andγ-ray spectrum,were obtained and compared with previous results for *** the implantation–decay method,the isotopes of interest were implanted into two doublesided silicon strip detectors,where their subsequent decays were measured and correlated with preceding implantations using both position and time *** detection system has potential for further applications,including the study ofβ-delayed charged-particle decay and direct proton emissions from even more exotic proton-rich nuclei.

关键词： β-delayed proton decay Double-sided silicon strip detector High-purity germanium detector Digital data acquisition system Implantation–decay correlation

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Low-temperature active soldering of 5A06-Al alloy and Ti-Cu-Ni alloy mesh-reinforced SAC305 composite solder: Interfacial bonding behavior and joint properties

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Journal of Materials Science and technology 2025年 235卷 313-323页

作者： Li, Dan Xi, Bangfu Xiao, Yong Song, Lizhi Zhang, Jian Luo, Dan Goodall, Russell School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Materials Science and Engineering The University of Sheffield SheffieldS1 3JD United Kingdom

Achieving reliable bonding is critical for low-temperature active soldering in Al alloys. In this study, a novel Ti-Cu-Ni alloy mesh-reinforced SAC305 composite solder was developed for active soldering of 5A06-Al alloy at 350 °C. Effects of soldering time on the microstructure and mechanical properties of joints were investigated, and the interfacial bonding mechanism of joints was analyzed. Results showed that the (Cu, Ni)6Sn5 phase was formed between alloy mesh and SAC305 solder in the active composite solder, while Ti atoms were uniformly released from the alloy mesh. Metallurgical products within joints mainly comprised (Cu, Ni)6Sn5 and Al3(Ni, Cu)2 phases, which developed with increasing soldering time. An amorphous Al2O3 layer and a Mg-containing layer were formed at the Al substrate/SAC305 solder interface. Mg atoms could enhance the charge transfer between Ti atoms and oxide film, attracting the diffusion of Ti atoms to oxide film. The oxide film removal processes relied on the synergistic impacts of Ti and Mg. The highest shear strength of joints reached 53.21 ± 0.91 MPa, exceeding previously reported properties for low-temperature active soldering by over 100 %. This exploration may provide insights into developing low-temperature active soldering technologies for Al alloys. © 2025

关键词： Titanium alloys

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Performance evaluation of high-power PPS based on HTS HIA by using FEM simulation

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Electrical engineering 2025年 1-22页

作者： Liu, Longjian Yu, Kexun Xie, Xianfei Faculty of Electric Power Engineering Kunming University of Science and Technology Kunming China State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

The capacitor charge power supplies (CCPS) based on homopolar inductor alternator (HIA) still faces significant challenges in terms of efficiency and power density. These limitations are primarily due to the large internal reactance and serious skin effects in the armature winding, low fundamental air-gap magnetic field, and the transient flux attenuation in HIA. To address these challenges, this paper proposes a CCPS based on high-temperature superconducting (HTS) HIA. The aim is to improve power density and efficiency by mitigating the aforementioned issues. The performance of the proposed HTS HIA-based CCPS is evaluated and compared with conventional HIA using FEM simulations. The study focuses on key performance indicators, such as power density, efficiency, and temperature rise. The HTS-HIA-based CCPS demonstrates a significantly higher power density and efficiency, and notably lower temperature rise compared to the conventional HIA. The reduction in internal reactance and the increasing in air-gap magnetic flux density by using slotless stator core and large air-gap length, and the elimination of transient flux attenuation by using HTS coil are critical factors that enhance the power density. The reduction in copper losses due to the slotless stator core and lower electrical frequency which reduces squeezing effects dramatically, along with the lower losses in the stator iron core, are critical factors that enhance the efficiency. The lower temperature rise is due to the much smaller copper loss compared to the conventional HIA. The proposed HTS-HIA-based CCPS shows substantial improvements in efficiency, power density and continuous emission capacity, making it a promising solution for applications such as laser weapons.

关键词： Capacitor charge power supply High temperature superconductivity Homopolar inductor alternator Transient flux attenuation

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Materials and devices for high‐density,high‐throughput micro‐electrocorticography arrays

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Fundamental Research 2025年第1期5卷 17-28页

作者： Yang Xie Yanxiu Peng Jinhong Guo Muyang Liu Bozhen Zhang Lan Yin He Ding Xing Sheng Department of Electronic Engineering Beijing National Research Center for Information Science and TechnologyInstitute for Precision MedicineLaboratory of Flexible Electronics TechnologyIDG/McGovern Institute for Brain ResearchTsinghua UniversityBeijing 100084China Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering The Key Laboratory of Advanced Materials of Ministry of EducationState Key Laboratory of New Ceramics and Fine ProcessingLaboratory of Flexible Electronics TechnologyTsinghua UniversityBeijing 100084China

The pursuit of precisely recording and localizing neural activities in brain cortical regions drives the development of advanced electrocorticography(ECoG)*** progress has led to the emergence of micro-ECoG(μECoG)devices with sub-millimeter *** review presents the current research status,development directions,potential innovations and applications of high-density,high-throughputμECoG ***,we summarize the challenges associated with accurately recording single or multiple neurons using existingμECoG devices,including passive multielectrode and active transistor ***,we focus on cutting-edge advancements in passiveμECoG devices by discussing the design principles and fabrication strategies to optimize three key parameters:impedance,mechanical flexibility,and ***,recent findings highlight the need for further research and development in active transistor arrays,including silicon,metal oxide,and solution-gated *** active transistor arrays have the potential to unlock the capabilities of high-density,high-throughputμECoG devices and overcome the limitations of passive multielectrode *** review explores the potential innovations and applications ofμECoG devices,showcasing their effectiveness for both brain science research and clinical applications.

关键词： Electrocorticography Micro-electrocorticography Flexible electronics Bioelectronics Neural electrode array

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A partially degradable composite consisting of Ti-Zr-Cu-Pd-Sn metallic glass and Fe-Mg alloy for orthopedic applications

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Acta Biomaterialia 2025年 198卷 514-529页

作者： Du, Peng Zuo, Kun Yan, Rongqiang Li, Kun Chen, Shilu Yuan, Bo Zhang, Liang Xie, Guoqiang Shenzhen518055 China Institute of Intelligent Manufacturing Technology Shenzhen Polytechnic University Shenzhen518055 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China School of Materials Science and Engineering Shandong University of Technology Zibo255000 China

Partially-degradable biomaterials refers to smart implants where biodegradable metals can gradually be replaced by newly growing bone or living tissues, and leave behind a porous inert metal skeleton that stably binds with the new bone tissue. In this research, a partially degradable composite was designed by integrating Ti-Zr-Cu-Pd-Sn metallic glass (MG) with designed Fe-Mg alloy using spark plasma sintering (SPS). The mechanical alloying technique successfully enabled the fusion of immiscible Fe and Mg, addressing the issues of Fe's slow degradation and Mg's rapid breakdown, while also minimizing potential fractures in the metal framework due to hydrogen gas evolution. The controlled degradation of Mg(Fe) promotes the formation of Ca-P compounds, enhancing the bioactivity of the Fe-Mg composite. This design endows the composite with plastic and ductile deformation under compression, providing a viable solution to the brittle fracture behaviour commonly associated with conventional bulk metallic glasses (BMGs). This advancement holds promise for aligning with the natural growth rate of human bone, further augmenting the bioactive properties and practical applications of the MG/Fe-Mg composite material. statement of significance: In this research, a partially degradable composite was designed by integrating Ti-Zr-Cu-Pd-Sn metallic glass (MG) with designed Fe-Mg alloy using SPS. The Fe-Mg alloy act as temporary space holders can gradually being replaced by newly formed bone, thus establishing a dynamic equilibrium between the biodegradation of the bio-metals and the inward growth of new bone. The degradation of Mg(Fe) promotes the formation of Ca-P compounds, enhancing the bioactivity of the composite. This design endows the composite with plastic deformation under compression, providing a viable solution to the brittle fracture behavior of conventional MGs. This advancement holds promise for aligning with the natural growth rate of human bone, further augmenting the

关键词： Magnesium alloys

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Resourceful Utilization of Ironmaking Waste: Synthesis of Ti5Si3 Alloy from Titanium-Bearing Blast Furnace Slag

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ISIJ International 2025年第3期65卷 460-469页

作者： Pang, Zhongya Chen, Shun Jiang, Zhenqiang Han, Chenyang Yu, Xing Zheng, Kai Chen, Chaoyi Li, Guangshi Xu, Qian Zou, Xingli Lu, Xionggang State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced Ferrometallurgy School of Materials Science and Engineering Shanghai University 99 Shangda Road BaoShan District Shanghai200444 China School of Materials and Energy Engineering Guizhou Key Laboratory for Preparation of Light Metal Materials Guizhou Institute of Technology Doctor Road Dangwu Town GUI ‘an New District Guiyang550025 China School of Materials and Metallurgy Guizhou University 2708 South Section of Huaxi Avenue Guiyang550025 China

Titanium-bearing blast furnace slag (TBFS), a byproduct of ironmaking processes, has long been discarded as waste, resulting in the squandering of valuable resources such as titanium. The recovery and effective utilization of TBFS hold immense significance and importance. This study reports a direct electrolysis method for synthesizing Ti5Si3 alloy from a TBFS/SiO2 mixture in molten CaCl2 at 950°C. A comprehensive investigation was conducted into the phase and morphological evolution during the electrolysis process, along with an analysis of the migration behavior of impurities such as Ca and Al present in TBFS. The synthesized Ti5Si3 alloy powder was systematically characterized and analyzed using scanning electron microscopy, transmission electron microscopy, and other techniques. The results reveal that the electrolysis process encompasses electrochemical deoxidation, in-situ alloying, and self-purification. Furthermore, this study achieved further purification of the Ti5Si3 alloy through vacuum laser rapid melting, effectively volatilizing and removing the residual impurity elements, resulting in an increase in the purity of Ti5Si3 alloy from 96.8% to 98.6%. The resultant Ti5Si3 alloy exhibits excellent corrosion resistance in phosphate buffer solution. In summary, this work provides a crucial technical paradigm and scientific theoretical foundation for the resourceful and value-added utilization of ironmaking solid waste, specifically TBFS. © 2025 The Iron and Steel Institute of Japan.

关键词： Slags

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Proposal and Validation of Vector Hysteresis Operator Based on Microscopic Magnetization Mechanism 11th

Proposal and Validation of Vector Hysteresis Operator Based ...

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11th Frontier Academic Forum of Electrical engineering, FAFEE 2024

作者： Ma, Guang He, Chengxu Cheng, Ling Lu, Mengxue Duan, Nana State Key Laboratory of Advanced Power Transmission Technology Beijing102209 China School of Electrical Engineering Xi’an Jiaotong University Xi’an710049 China

ISBN: (纸本)9789819788118

In this paper, a new vector hysteresis operator is proposed based on the microscopic magnetization mechanism of magnetic materials. Firstly, the magnetization mechanism of magnetic materials is analyzed, and an ideal self-consistent crystal model is proposed. Then the vector hysteresis operator is proposed based on the principle of energy minimum stability, considering the magnetocrystalline anisotropy energy and magnetostatic energy of cubic crystal materials. Finally, the validity of vector hysteresis operator is verified by the comparison of the experimental and simulation results of the silicon steel samples under the alternating current magnetic field. The proposed new vector hysteresis operator is helpful to improve the accurate simulation of magnetic properties of magnetic materials, which is of great significance in engineering applications. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Silicon steel

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Structure deformation of Ni-Fe-Se enables efficient oxygen evolution via RE atoms doping

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Rare Metals 2025年第1期44卷 336-348页

作者： Hong-Rui Zhao Cheng-Zong Yuan Cong-Hui Li Wen-Kai Zhao Fu-Ling Wu Lei Xin Hong Yin Shu-Feng Ye Xiao-Meng Zhang Yun-Fa Chen Jiangxi Province Research Institute of Rare Earths Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou341119China School of Rare Earths University of Science and Technology of ChinaHefei230026China Key Laboratory of Hunan Province for Advanced Carbon-Based Functional Materials School of Chemistry and Chemical EngineeringHunan Institute of Science and TechnologyYueyang414006China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing100190China

The development of cost-effective and highly stable electrocatalysts for oxygen evolution reactions holds paramount importance in practical hydrogen ***,we present a novel self-supported electrode comprising Ce-doped Ni-Fe-Se nanosheets grown on carbon cloth(Ni-Fe-Ce-Se/CC).This electrode was synthesized through a selenylation process,utilizing Ni-Fe-Ce-layered double hydroxide/carbon cloth(Ni-Fe-Ce LDH/CC)as the ***,Ni-Fe-Ce-Se/CC electrode demonstrates remarkable performance,requiring a low overpotential of 300 mV to attain a current density of 100 mA·cm^(-2)under harsh alkaline ***,the electrode exhibits exceptional stability during continuous operation for 100 *** into the underlying mechanisms was gained through a combination of experimental results and density functional theory *** findings reveal that Ce doping induces crystal structure deformation in Ni-Fe-Se and enhances electron enrichment around Ni *** structural modification optimizes the adsorption energy of oxygen-based intermediates on the Ni-Fe-Se *** work offers a valuable strategy for regulating the electron transfer and adsorption capabilities of transition metal selenide electrocatalysts through RE atoms doping,opening new avenues for enhanced electrocatalytic performance.

关键词： Ce doping Structure deformation Ni-Fe-Se Electron transfer Oxygen evolution

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Proposal and Validation of the Vector Hysteresis Model Considering the Effect of Pressure 11th

Proposal and Validation of the Vector Hysteresis Model Consi...

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11th Frontier Academic Forum of Electrical engineering, FAFEE 2024

ISBN: (纸本)9789819788118

Magnetic materials will be affected by non-magnetic factors such as temperature, pressure and stress in actual working conditions, which will change the magnetic properties of magnetic materials, thus affecting the simulation results. A vector hysteresis model considering the effect of pressure is proposed in this paper. Firstly, based on the magnetization mechanism of ferromagnetic materials, a vector hysteresis operator is proposed, an energy calculation formula considering magnetostatic energy and anisotropic energy is proposed, and an octagonal star rule is proposed to determine the current magnetization state of ferromagnetic materials. Then the proposed model is modified considering the influence of pressure, and the different distribution functions under different pressures are proposed. Finally, the validity of the model is verified by comparing the experimental results with the simulation results. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Distribution function Pressure effect Vector hysteresis model

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Effects of nuclear deformation and surface polarization on proton-emission half-lives

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Chinese Physics C 2025年第4期49卷 186-198页

作者： Hanlin Wang Zhen Wang Dong Bai Dongdong Ni Zhongzhou Ren School of Physics Science and Engineering Tongji UniversityShanghai 200092China College of Mechanics and Engineering Science Hohai UniversityNanjing 211100China Institute of Science and Technology for Deep Space Exploration Suzhou CampusNanjing UniversitySuzhou 215163China State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao 999078China Key Laboratory of Advanced Micro-Structure Materials Ministry of EducationShanghai 200092China

Proton radioactivity is used to investigate the characteristics of unstable neutron-deficient nuclei beyond the proton *** on the tunneling of one proton through the potential barrier formed by Woods-Saxon plus expanded Coulomb potentials,the half-lives of various proton emitters are calculated using distorted wave Born *** particular,deformation and nuclear surface polarization are considered in our calculation,and their effects on proton-emission half-lives are *** analytic formula expressing the relationship between spectroscopic factors and deformation and polarization,which significantly reduces the deviations of calculated half-lives from experimental data,is proposed as ***,inspired by the new experimental results for the first proton emitter ever discovered,^(53)Co^(m)[*** et al.,***.14,5961(2023)],we calculate its two proton-emission branches and interpret the partial *** is noteworthy that this high-spin isomer has some particular characteristics,including diminutive spectroscopic factors and stronger daughter-proton interactions,that considerably enhance the effects of deformation and polarization.

关键词： proton emission proton dripline Gamow model

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