Aluminum is the primary structural material in nuclear engineering,and its cross section induced by 14-MeV neutrons is of great significance.To address the issue of insufficient accuracy for the^(27)Al(n,2n)^(26)Al re...Aluminum is the primary structural material in nuclear engineering,and its cross section induced by 14-MeV neutrons is of great significance.To address the issue of insufficient accuracy for the^(27)Al(n,2n)^(26)Al reaction cross section,the activation method and accelerator mass spectrometry(AMS)technique were used to determine the^(27)Al(n,2n)^(26)Al cross section,which could be used as a D-T plasma ion temperature monitor in fusion reactors.At the China Academy of Engineering Physics,neutron activation was performed using a K-400 neutron generator produced by the T(d,n)4He reaction.The^(26)Al∕^(27)Al isotope ratios were measured using the newly installed GYIG 1 MV AMS at the Institute of Geochemistry,Chinese Academy of Sciences.The neutron flux was monitored by measuring the activity of 92mNb produced by the 93Nb(n,2n)92mNb reaction.The measured results were compared with available data in the experimental nuclear reaction database,and the measured values showed a reasonable degree of consistency with partially available literature data.The newly acquired cross-sectional data at 12 neutron energy points through systematic measurements clarified the divergence,which has two different growth trends from the existing experimental values.The obtained results are also compared with the corresponding evaluated database,and the newly calculated excitation functions with TALYS−1.95 and EMPIRE−3.2 codes,the agreement with CENDL−3.2,TENDL-2021 and EMPIRE−3.2 results are generally acceptable.A substantial improvement in the knowledge of the^(27)Al(n,2n)^(26)Al reaction excitation function was obtained in the present work,which will lay the foundation for the diagnosis of the fusion ion temperature,testing of the nuclear physics model,evaluation of nuclear data,etc.展开更多
The newly developed software,Nucleus++,is an advanced tool for displaying basic nuclear physics properties from NubAsE and integrating comprehensive mass information for each nuclide from Atomic Mass Evaluation.Additi...The newly developed software,Nucleus++,is an advanced tool for displaying basic nuclear physics properties from NubAsE and integrating comprehensive mass information for each nuclide from Atomic Mass Evaluation.Additionally,it allows users to compare experimental nuclear masses with predictions from different mass models.Building on the success and learning experiences of its predecessor,Nucleus,this enhanced tool introduces improved functionality and compatibility.With its user-friendly interface,Nucleus++was designed as a valuable tool for scholars and practitioners in the field of nuclear science.This article offers an in-depth description of Nucleus++,highlighting its main features and anticipated impacts on nuclear science research.展开更多
A silylated melamine sponge(SMS)was prepared by two simple steps,namely,immersion and dehydration of a melamine sponge coated with methyltrichlorosilane.The silylated structure of SMS was characterized by FT-IR(Fourie...A silylated melamine sponge(SMS)was prepared by two simple steps,namely,immersion and dehydration of a melamine sponge coated with methyltrichlorosilane.The silylated structure of SMS was characterized by FT-IR(Fourier-transform infrared)spectroscopy,SEM(Scanning electron microscopy)and in terms of water contact angles.Its oil-water absorption and separation capacities were measured by FT-IR and UV-visible spectrophoto-metry.The experimental results have shown that oligomeric silanol covalently bonds by Si-N onto the surface of melamine sponge skeletons.SMS has shown superhydrophobicity with a water contact angle exceeding 150°±1°,a better separation efficiency with regard to diesel oil(by 99.31%(wt/wt%)in oil-water mixture and even up to 99.99%(wt/wt%)for diesel oil in its saturated aqueous solution.Moreover,SMS inherited the intrinsicflame retardancy of the melamine sponge.In general,SMS has shown superhydrophobicity,high porosity,excellent selectivity,remarkable recyclability,and better absorption capacity for various oils and organic solvents,and a high separation efficiency for oil in saturated aqueous solutions.展开更多
目的探讨抗菌药物科学化管理(Antimicrobial Stewardship,AMS)联合PDCA循环管理在降低医院妇科抗菌药物使用强度(Antibacterial use density,AUD)中的临床价值。方法选取2023年3月~2024年2月盱眙县人民医院妇科收治的100例患者为研究对...目的探讨抗菌药物科学化管理(Antimicrobial Stewardship,AMS)联合PDCA循环管理在降低医院妇科抗菌药物使用强度(Antibacterial use density,AUD)中的临床价值。方法选取2023年3月~2024年2月盱眙县人民医院妇科收治的100例患者为研究对象,2023年3月~6月收治的50例患者为对照组,不接受任何抗菌药物管理,2023年7月~2024年2月收治的50例患者为干预组,接受AMS联合PDCA循环管理方案。比较两组抗菌药物使用种类及比例、AUD以及不合理用药情况。结果两组使用的抗菌药物种类主要包括头孢呋辛、头孢唑林、奥硝唑、头孢哌酮舒巴坦钠4类,干预组的四种抗菌药物使用比例[头孢呋辛(28.00%)、头孢唑林(22.00%)、奥硝唑(20.00%)、头孢哌酮舒巴坦钠(40.00%)]均明显低于对照组[头孢呋辛(72.00%)、头孢唑林(58.00%)、奥硝唑(56.00%)、头孢哌酮舒巴坦钠(66.00%)],差异有统计学意义(P<0.05)。干预组的AUD低于对照组。干预组的无指征用药比例低于对照组,干预组总不合理用药率(8.00%)低于对照组(32.00%)(P<0.05)。结论AMS联合PDCA管理能够显著降低医院妇科抗菌药物使用比例、AUD以及不合理用药情况发生率,临床上具有重要意义。展开更多
基金the Open Project of Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology(NLK 2022-04)the Central Government Guidance Funds for Local Scientific and Technological Development,China(No.Guike,ZY22096024)+1 种基金the National Natural Science Foundation of China(12065003)Guangxi Key R&D Project(2023AB07029).
文摘Aluminum is the primary structural material in nuclear engineering,and its cross section induced by 14-MeV neutrons is of great significance.To address the issue of insufficient accuracy for the^(27)Al(n,2n)^(26)Al reaction cross section,the activation method and accelerator mass spectrometry(AMS)technique were used to determine the^(27)Al(n,2n)^(26)Al cross section,which could be used as a D-T plasma ion temperature monitor in fusion reactors.At the China Academy of Engineering Physics,neutron activation was performed using a K-400 neutron generator produced by the T(d,n)4He reaction.The^(26)Al∕^(27)Al isotope ratios were measured using the newly installed GYIG 1 MV AMS at the Institute of Geochemistry,Chinese Academy of Sciences.The neutron flux was monitored by measuring the activity of 92mNb produced by the 93Nb(n,2n)92mNb reaction.The measured results were compared with available data in the experimental nuclear reaction database,and the measured values showed a reasonable degree of consistency with partially available literature data.The newly acquired cross-sectional data at 12 neutron energy points through systematic measurements clarified the divergence,which has two different growth trends from the existing experimental values.The obtained results are also compared with the corresponding evaluated database,and the newly calculated excitation functions with TALYS−1.95 and EMPIRE−3.2 codes,the agreement with CENDL−3.2,TENDL-2021 and EMPIRE−3.2 results are generally acceptable.A substantial improvement in the knowledge of the^(27)Al(n,2n)^(26)Al reaction excitation function was obtained in the present work,which will lay the foundation for the diagnosis of the fusion ion temperature,testing of the nuclear physics model,evaluation of nuclear data,etc.
基金supported in part by the National Key R&D Program of China(No.2021YFA1601500)CAS Project for Young Scientists in Basic Research(No.YSBR-002)+5 种基金Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB34000000)the Regional Development Youth Program of the Chinese Academy of Sciences(People’s Character[2023]No.15)Argonne National Laboratory was performed with the support of the US Department of EnergyOffice of Nuclear Physicsunder Contract No.DE-AC02-06CH11357support of France's IN2P3。
文摘The newly developed software,Nucleus++,is an advanced tool for displaying basic nuclear physics properties from NubAsE and integrating comprehensive mass information for each nuclide from Atomic Mass Evaluation.Additionally,it allows users to compare experimental nuclear masses with predictions from different mass models.Building on the success and learning experiences of its predecessor,Nucleus,this enhanced tool introduces improved functionality and compatibility.With its user-friendly interface,Nucleus++was designed as a valuable tool for scholars and practitioners in the field of nuclear science.This article offers an in-depth description of Nucleus++,highlighting its main features and anticipated impacts on nuclear science research.
基金funded by Qingyang Science and Technology Support Project(KT2019-03)。
文摘A silylated melamine sponge(SMS)was prepared by two simple steps,namely,immersion and dehydration of a melamine sponge coated with methyltrichlorosilane.The silylated structure of SMS was characterized by FT-IR(Fourier-transform infrared)spectroscopy,SEM(Scanning electron microscopy)and in terms of water contact angles.Its oil-water absorption and separation capacities were measured by FT-IR and UV-visible spectrophoto-metry.The experimental results have shown that oligomeric silanol covalently bonds by Si-N onto the surface of melamine sponge skeletons.SMS has shown superhydrophobicity with a water contact angle exceeding 150°±1°,a better separation efficiency with regard to diesel oil(by 99.31%(wt/wt%)in oil-water mixture and even up to 99.99%(wt/wt%)for diesel oil in its saturated aqueous solution.Moreover,SMS inherited the intrinsicflame retardancy of the melamine sponge.In general,SMS has shown superhydrophobicity,high porosity,excellent selectivity,remarkable recyclability,and better absorption capacity for various oils and organic solvents,and a high separation efficiency for oil in saturated aqueous solutions.
文摘目的探讨抗菌药物科学化管理(Antimicrobial Stewardship,AMS)联合PDCA循环管理在降低医院妇科抗菌药物使用强度(Antibacterial use density,AUD)中的临床价值。方法选取2023年3月~2024年2月盱眙县人民医院妇科收治的100例患者为研究对象,2023年3月~6月收治的50例患者为对照组,不接受任何抗菌药物管理,2023年7月~2024年2月收治的50例患者为干预组,接受AMS联合PDCA循环管理方案。比较两组抗菌药物使用种类及比例、AUD以及不合理用药情况。结果两组使用的抗菌药物种类主要包括头孢呋辛、头孢唑林、奥硝唑、头孢哌酮舒巴坦钠4类,干预组的四种抗菌药物使用比例[头孢呋辛(28.00%)、头孢唑林(22.00%)、奥硝唑(20.00%)、头孢哌酮舒巴坦钠(40.00%)]均明显低于对照组[头孢呋辛(72.00%)、头孢唑林(58.00%)、奥硝唑(56.00%)、头孢哌酮舒巴坦钠(66.00%)],差异有统计学意义(P<0.05)。干预组的AUD低于对照组。干预组的无指征用药比例低于对照组,干预组总不合理用药率(8.00%)低于对照组(32.00%)(P<0.05)。结论AMS联合PDCA管理能够显著降低医院妇科抗菌药物使用比例、AUD以及不合理用药情况发生率,临床上具有重要意义。
