Direct Electrochemical Preparation of Ni-Zr Alloy from Mixture Oxides in LiCl Molten Salt
作者:
Ping, Xinyu;Liu, Kui;Liu, Yalan;Yuan, Liyong;Yao, Benlin;...
期刊:
JOURNAL OF THE ELECTROCHEMICAL SOCIETY ,2017年164(13):D888-D894 ISSN:0013-4651
通讯作者:
Shi, Weiqun
作者机构:
[Yao, Benlin; Yuan, Liyong; Chai, Zhifang; Liu, Kui; Shi, Weiqun; Liu, Yalan; Ping, Xinyu] Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Energy Chem, Beijing 100049, Peoples R China.;[Zhao, Xiuliang; Ping, Xinyu] Univ South China, Sch Nucl Sci & Technol, Hengyang 421000, Peoples R China.;[Yao, Benlin] China Inst Atom Energy, Dept Radiochem, Beijing 102413, Peoples R China.;[Chai, Zhifang] Soochow Univ, Sch Radiol & Interdisciplinary Sci, Suzhou 215123, Peoples R China.
通讯机构:
[Shi, Weiqun] C;Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Energy Chem, Beijing 100049, Peoples R China.
摘要:
The Ni<inf>5</inf>Zr alloy prepared from the mixture of nickel oxide (NiO) and zirconium oxide (ZrO<inf>2</inf>) powders by direct electrochemical reduction was conducted in molten lithium chloride (LiCl) at 923 K. The electrochemical reduction behaviors of ZrO<inf>2</inf>and NiO-ZrO<inf>2</inf>mixture were firstly investigated by cyclic voltammetry measurements. The influence of process parameters such as oxide composition, compression force, sintering time, and cell voltage on the electrolysis process have been comprehensively evaluated in terms of the electrochemical reducibility of ZrO<inf>2</inf>. The results demonstrated that the reduction starts with the reduction of NiO to Ni metal, and is followed by the reduction of ZrO<inf>2</inf>on the pre-formed Ni particles to generate the intermetallic Ni<inf>5</inf>Zr. The pure Ni<inf>5</inf>Zr alloy can be prepared by direct electrochemical reduction of mixed 5NiO-ZrO<inf>2</inf>pellets when the cell voltage of 3.2 V is applied. The reduction rate increases with higher content of NiO in a NiO–ZrO<inf>2</inf>mixture pellet. However, the quality of formed Ni<inf>5</inf>Zr intermetallic compound particle seems unaffected under different preparation conditions.<br/> ©2017 The Electrochemical Society. All rights reserved.
语种:
英文
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核类专业创新培养基地教学保障体系构建思考
作者:
罗文;宋英明;陈小兰
期刊:
新西部:下旬·理论 ,2017年(1):122,117 ISSN:1009-8607
作者机构:
南华大学核科学技术学院 湖南衡阳421001;南华大学数理学院 湖南衡阳421001;[罗文; 陈小兰; 宋英明] 南华大学
关键词:
大学生创新培养基地;核类专业;建设理念;实践教学;保障体系
摘要:
本文阐述了核类专业大学生创新培养基地建设的必要性,介绍了“以大学生为本、创新为魂”的基地建设理念,分析了核类专业大学生创新培养基地实践教学保障体系的实施环节.认为,要抓好创新基地遴选、导师队伍建设、课程体系改革、创新项目设置、学术氛围营造、人文素养提升等六大环节.
语种:
中文
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环境学导论课程中对“人工生态系统与技术革命”的思考
作者:
刘红娟;尹显和
期刊:
科技创新导报 ,2017年(19):245-246 ISSN:1674-098X
作者机构:
南华大学核科学技术学院 湖南衡阳 421001;[刘红娟; 尹显和] 南华大学
关键词:
人工生态系统;生存;技术革命
摘要:
人类在适应和改造自然生态系统的基础上建立了人工生态系统。人工生态系统是人类社会生产力发展水平的标志之一。根据环境科学理论,以人工生态系统的变化为线索,提出将人类社会生产力的发展主要划分为农业革命、工业革命及信息技术革命三个阶段的观点,并以所建立的人工生态系统为标志评价技术革命的成效,判断社会生产力的发展水平,并展望人类未来人工生态系统的发展概貌。
语种:
中文
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The effect of sample treatments on the oxygen isotopic composition of phosphate pools in soils
作者:
Jiang, Zhao-Hua;Zhang, Han;Jaisi, Deb P.;Blake, Ruth E.;Zheng, Ai-Rong;...
期刊:
Chemical Geology ,2017年474:9-16 ISSN:0009-2541
通讯作者:
Chen, Zhi-Gang;Peng, An-Guo
作者机构:
[Zheng, Ai-Rong; Lei, Xue-Tie; Kang, Kai-Qiang; Chen, Min; Jiang, Zhao-Hua; Chen, Zhi-Gang] Xiamen Univ, Coll Ocean & Earth Sci, Xiamen 361102, Peoples R China.;[Jiang, Zhao-Hua; Peng, An-Guo] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Zhang, Han] Chinese Acad Sci, Inst Urban Environm, Xiamen 361021, Peoples R China.;[Jaisi, Deb P.] Univ Delaware, Dept Plant & Soil Sci, Newark, DE 19716 USA.;[Blake, Ruth E.; Chen, Zhi-Gang] Yale Univ, Dept Geol & Geophys, POB 6666, New Haven, CT 06520 USA.
通讯机构:
[Chen, Zhi-Gang] X;[Peng, An-Guo] U;Xiamen Univ, Coll Ocean & Earth Sci, Xiamen 361102, Peoples R China.;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词:
Phosphate oxygen isotopic composition;Sample treatment methods;Sequential extraction;Soil phosphorus pools
摘要:
The oxygen isotopic composition of phosphate (δ<sup>18</sup>O<inf>P</inf>) has been increasingly used as an effective tracer for the biogeochemical cycling of phosphorus (P) in soils and other environments. However, diverse pretreatment methods (e.g. storage, preparation and extraction) are being used for soil samples. For the uniformity of methods as well as for the comparison of results, it is important to understand if specific treatment methods can compromise original δ<sup>18</sup>O<inf>P</inf>values. Here, Ag<inf>3</inf>PO<inf>4</inf>and KH<inf>2</inf>PO<inf>4</inf>were used to test whether a modified Hedley sequential extraction and purification procedure can alter the δ<sup>18</sup>O<inf>P</inf>values of phosphate standards. Additionally, to test the effect of sample storage and drying conditions, two types of soils were first processed by using eight different pretreatment methods including sterilizing, storing, drying, and sieving and then the δ<sup>18</sup>O<inf>P</inf>values of each soil P pool were measured. Results indicate that the extraction and purification procedure, drying temperature (<0 °C to 80 °C) and sieving mesh (20 to 100) had no significant effect on the δ<sup>18</sup>O<inf>P</inf>values of P<inf>i</inf>(inorganic P) pools, but storage at room temperature (without microbial growth inhibitor-HgCl<inf>2</inf>added) can lead to significant changes in δ<sup>18</sup>O<inf>P</inf>values of almost all P pools. For the two soils studied, the δ<sup>18</sup>O<inf>P</inf>values of P<inf>i</inf>pools decrease from H<inf>2</inf>O (H<inf>2</inf>O-P<inf>i</inf>) to NaHCO<inf>3</inf>(NaHCO<inf>3</inf>-P<inf>i</inf>), NaOH (NaOH-P<inf>i</inf>) and HCl (HCl-P<inf>i</inf>), and organic P was also found in the extraction solution of HCl. Furthermore, the δ<sup>18</sup>O<inf>P</inf>values calculated from isotope mass balance were different from the measured values suggesting variable extraction of different P pools during single and sequential extraction methods. Collectively these results highlight the need for a unified and standard processing and extraction methods for soil samples to allow meaningful intercomparison of results.<br/> ©2017
语种:
英文
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Systematic study of α decay half-lives of doubly odd nuclei within the two-potential approach
作者:
Sun, Xiao-Dong;Deng, Jun-Gang;Xiang, Dong* ;Guo, Ping;Li, Xiao-Hua
期刊:
PHYSICAL REVIEW C ,2017年95(4):044303 ISSN:2469-9985
通讯作者:
Xiang, Dong
作者机构:
[Guo, Ping; Sun, Xiao-Dong] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua; Xiang, Dong; Deng, Jun-Gang] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.
通讯机构:
[Xiang, Dong] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
摘要:
α decay is a common and important process of natural radioactivity of the heavy and superheavy nuclei. From the α decay of nuclei, we can obtain much more information of nuclei structure. In our previous works [X.-D. Sun et al., Phys. Rev. C 93, 034316 (2016); X.-D. Sun et al., Phys. Rev. C 95, 014319 (2017)], we have done systematic study on the α preformation probability of both the even-even and odd- A nuclei within the two-potential approach. The α preformation probabilities will systematically change due to the shell effect, proton-neutron correlation, and so on. This work is the extension of the previous works. In this work, we systematically study the α decay of doubly odd nuclei. We find that for superallowed α decay the α preformation probabilities of doubly odd nuclei are larger than those of odd- A ones in general, and for the heavier nuclei the extra neutrons suppress the proton-neutron correlation resulting in the small α preformation probabilities. The calculated results can well reproduce the experimental half-lives. The half-lives of the α decay chain beginning from nuclide 119296 are also predicted and compared with various empirical formulas.
语种:
英文
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Photonuclear reactions in astrophysical p-process: Theoretical calculations and experiment simulation based on ELI-NP
作者:
Xu, Yi* ;Luo, Wen;Balabanski, Dimiter;Goriely, Stephane;Matei, Catalin;...
期刊:
EPJ Web of Conferences ,2017年146 ISSN:2100-014X
通讯作者:
Xu, Yi
作者机构:
[Matei, Catalin; Xu, Yi; Balabanski, Dimiter; Tesileanu, Ovidiu] Extreme Light Infrastruct Nucl Phys, Magurele 077125, Ilfov, Romania.;[Luo, Wen] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Goriely, Stephane] Univ Libre Bruxelles, Inst Astron & Astrophys, CP 226, B-1050 Brussels, Belgium.
通讯机构:
[Xu, Yi] E;Extreme Light Infrastruct Nucl Phys, Magurele 077125, Ilfov, Romania.
会议名称:
International Conference on Nuclear Data for Science and Technology (ND)
会议时间:
SEP 11-16, 2016
会议地点:
Bruges, BELGIUM
会议主办单位:
[Xu, Yi;Balabanski, Dimiter;Matei, Catalin;Tesileanu, Ovidiu] Extreme Light Infrastruct Nucl Phys, Magurele 077125, Ilfov, Romania.^[Luo, Wen] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.^[Goriely, Stephane] Univ Libre Bruxelles, Inst Astron & Astrophys, CP 226, B-1050 Brussels, Belgium.
会议论文集名称:
EPJ Web of Conferences
关键词:
conference;proceedings;physics;astronomy;The European Physical Journal;EPJ
摘要:
The astrophysical p-process is an important way of nucleosynthesis to produce the stable and proton-rich nuclei beyond Fe which can not be reached by the s-and r-processes. In the present study, the astrophysical reaction rates of (γ,n), (γ,p), and (γ,α) reactions are computed within the modern reaction code TALYS for about 3000 stable and proton-rich nuclei with 12 < Z < 110. The nuclear structure ingredients involved in the calculation are determined from experimental data whenever available and, if not, from global microscopic nuclear models. In particular, both of the Wood-Saxon potential and the double folding potential with density dependent M3Y (DDM3Y) effective interaction are used for the calculations. It is found that the photonuclear reaction rates are very sensitive to the nuclear potential, and the better determination of nuclear potential would be important to reduce the uncertainties of reaction rates. Meanwhile, the Extreme Light Infrastructure-Nuclear Physics (ELI-NP) facility is being developed, which will provide the great opportunity to experimentally study the photonuclear reactions in p-process. Simulations of the experimental setup for the measurements of the photonuclear reactions 96Ru(γ,p) and 96Ru(γ,α) are performed. It is shown that the experiments of photonuclear reactions in p-process based on ELI-NP are quite promising. © The Authors, published by EDP Sciences, 2017.
语种:
英文
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飞秒激光脉宽对三态阶跃型分子波包运动的影响研究
作者:
郭玮;常志强;王怡;路兴强
期刊:
原子与分子物理学报 ,2017年34(5):908-914 ISSN:1000-0364
作者机构:
南华大学电气工程学院,衡阳421001;中国科学院大连化学物理研究所分子反应动力学国家重点实验室,大连116023;南华大学电气工程学院,衡阳,421001;南华大学核科学技术学院,衡阳,421001;[郭玮; 路兴强; 常志强; 王怡] 南华大学
关键词:
分子物理学;波包运动;含时波包法;三态阶跃型K2分子;光电子能谱;态布居数
摘要:
用含时波包法研究了三态阶跃型K2分子在强飞秒泵浦-探测激光场中脉宽对波包动力学过程的影响.研究表明激光场强较弱或者脉宽较短都可能不出现Autler-Townes分裂.波包的振荡周期随脉宽增长而增大,而振荡幅度随脉宽增长而减小.脉宽影响Rabi振荡,而Rabi振荡的变化又导致了基态和激发态布居数周期性变化.首次量化了脉宽对激发态布居数的影响,表明变化频率随着泵浦场强的增强而增大.研究表明调节激光脉宽可实现对态布居数的选择性分布,可以为实验上实现分子的光控制提供重要参考.
语种:
中文
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基于STM32的放射源远程监控与跟踪终端装置研制
作者:
古国强;戴石良;颜拥军;于如
期刊:
南华大学学报(自然科学版) ,2017年31(4):80-85 ISSN:1673-0062
作者机构:
南华大学 电气工程学院,湖南 衡阳,421001;湖南省核三力技术工程有限公司,湖南 衡阳,421001;南华大学 核科学技术学院,湖南 衡阳,421001;阳江核电有限公司 安防部,广东 阳江,529941;[于如] 阳江核电有限公司
关键词:
G-M计数管;放射源监测与跟踪;GPRS通信;GPS定位;传感器技术
摘要:
介绍基于STM32的放射源远程监控与跟踪终端装置的组成:采用基于ARM内核的单片机作为主控中心,利用G-M计数管作为探测器,增设了传感器和大容量存储器.结合GP S/GP RS技术,实现了长时间对辐射源的监测与数据远程收发.该装置具有自动报警功能,能够对放射源的异常状态做出及时有效反应,便于相关工作人员立即采取措施,避免核泄漏事故的发生.
语种:
中文
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基于蒙特卡罗模拟的α能谱拖尾分析
作者:
孙荣忠;康玺;王郦彬;许艳婷
期刊:
南华大学学报(自然科学版) ,2017年31(4):37-40 ISSN:1673-0062
作者机构:
南华大学 核科学技术学院,湖南 衡阳,421001;[许艳婷; 孙荣忠; 康玺; 王郦彬] 南华大学
关键词:
α能谱;蒙特卡罗
摘要:
α能谱测量是通过对放射性核素释放α粒子能量的测量来实现核素识别和定量分析的技术.α能谱易受测量样品形态的影响,存在着向低能拖尾的现象,这降低了α能谱测量的准确性.为了分析α能谱谱形特点,采用蒙特卡罗程序Geant4模拟了241 Am源的α能谱,并对可能造成241 Amα能谱峰拖尾的因素进行了模拟分析.结果表明,241 Am源上沉积的灰尘是其α能谱峰拖尾的主要原因;采用最小二乘法拟合可以对沉积灰尘的粒径分布进行估计.这项工作也表明基于蒙特卡罗模拟的α能谱分析可获得测量样品更多特性(如形状),有助于提高α能谱的分析能力.
语种:
中文
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无线传感网可信信息覆盖空洞检测策略研究
作者:
邹增辉;龚学余;邓贤君;唐祖君
期刊:
南华大学学报(自然科学版) ,2017年31(1):32-38 ISSN:1673-0062
作者机构:
南华大学 电气工程学院,湖南 衡阳,421001;南华大学 电气工程学院,湖南 衡阳 421001;南华大学 核科学技术学院,湖南 衡阳 421001;[邓贤君; 龚学余; 邹增辉; 唐祖君] 南华大学
关键词:
无线传感器网络;可信信息覆盖模型;覆盖空洞;空间相关性
摘要:
针对静止无线传感器网络运行过程中的覆盖空洞问题,研究并设计了一种基于可信信息覆盖模型的覆盖空洞检测策略.该策略挖掘和利用感测环境变量的空间相关性,通过栅格化将感测区域划分为多个方格,采用贪婪式策略对方格逐个计算其可信信息覆盖度,将其与可信信息覆盖阈值进行比较,进而判断可信信息覆盖空洞的数目和位置,最大可能地检测出所有可信信息覆盖空洞,并利用图像处理方法提取空洞边界.仿真实验结果表明所设计策略可有效确定可信信息覆盖空洞数目和边界信息.
语种:
中文
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蒙特卡罗中子输运计算中弥散型颗粒燃料的子网格随机模型研究
作者:
陈珍平;谢金森;郭倩;谢芹;刘紫静;...
期刊:
南华大学学报(自然科学版) ,2017年31(4):31-36 ISSN:1673-0062
作者机构:
南华大学 核科学技术学院,湖南 衡阳,421001;南华大学 环境与安全工程学院,湖南 衡阳,421001;[谢金森; 谢芹; 刘紫静; 陈珍平; 郭倩; 于涛; 谢超] 南华大学
关键词:
蒙特卡罗;颗粒燃料;子网格模型;堆芯物理
摘要:
弥散型颗粒燃料在燃料元件中的随机分布特性给传统的堆芯物理计算方法带来巨大困难与挑战.主要针对蒙特卡罗中子输运计算,开展基于子网格模型的颗粒燃料随机模型建模方法研究,探讨了网格尺寸大小对随机模型建模效率和堆芯物理计算精度的影响,给出了最佳网格尺寸参数.数值结果表明,基于最佳网格尺寸参数的子网格模型可较好地满足弥散型颗粒燃料的堆芯物理计算需求.
语种:
中文
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Electronic stopping power of slow H+ and He2+ ions in CdTe from first principle
作者:
Li, Chang-kai;Mao, Fei;Fu, Yan-long;Liao, Bin;Ouyang, Xiao-ping;...
期刊:
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS ,2017年392:51-57 ISSN:0168-583X
通讯作者:
Zhang, Feng-Shou
作者机构:
[Liao, Bin; Zhang, Feng-Shou; Fu, Yan-long; Li, Chang-kai] Beijing Normal Univ, Coll Nucl Sci & Technol, Key Lab Beam Technol & Mat Modificat, Minist Educ, Beijing 100875, Peoples R China.;[Liao, Bin; Zhang, Feng-Shou; Fu, Yan-long; Li, Chang-kai] Beijing Radiat Ctr, Beijing 100875, Peoples R China.;[Mao, Fei] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Ouyang, Xiao-ping] Northwest Inst Nucl Technol, Xian 710024, Peoples R China.;[Zhang, Feng-Shou] Natl Lab Heavy Ion Accelerator Lanzhou, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China.
通讯机构:
[Zhang, Feng-Shou] B;Beijing Normal Univ, Coll Nucl Sci & Technol, Key Lab Beam Technol & Mat Modificat, Minist Educ, Beijing 100875, Peoples R China.
关键词:
Electronic stopping power;ED-TDDFT;Charge transfer;Velocity proportionality
摘要:
We study through time-dependent density-functional theory (TDDFT) method the electronic stopping power of low-energy protons and helium ions moving through CdTe under the condition of channeling. The agreement between our calculated results and SRIM data roughly up to the stopping maximum for the proton along the < 1 0 0 > and < 1 1 1 > crystalline axes and for helium ions along < 1 0 0 > crystalline axis is satisfactory, which can be explained by the energy transfer mechanism that electron-hole excitation caused by ions in the solid. However, in the channel of < 1 1 1 > for helium ions, a transition between two velocities regimes is observed at about v = 0.4 a.u. This may be an indication of extra energy loss channel beyond the electron-hole excitation. To analyze it, we calculate the amount of electrons captured by the moving projectiles in real time. It is found that the soft transition between two velocities regimes can be attributed to the charge transfer and charge resonance between helium ion and host atoms of CdTe crystal, which are considered as additional energy loss channels. (C) 2016 Elsevier B.V. All rights reserved.
语种:
英文
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纳米α-Fe2O3的制备及其正电子湮没谱学研究
作者:
夏艳芳;刘敏
期刊:
南华大学学报(自然科学版) ,2017年31(1):96-100 ISSN:1673-0062
作者机构:
南华大学 核科学技术学院,湖南 衡阳,421001;[夏艳芳; 刘敏] 南华大学
关键词:
氧化铁;X射线衍射谱;正电子湮没寿命谱
摘要:
对氧化铁颗粒进行了X射线衍射谱(XRD)测量和正电子湮没寿命谱(PALS)测量,分别运用Jade和Lifetime软件拟合数据,研究了纳米氧化铁颗粒的结构、缺陷以及自由电子密度.XRD测量结果表明了氧化铁是简单六方晶系,空间群是R-3c(167),其相应的点阵常数分别是三个基矢的长度a=b=0.530 42 nm,c=1.374 60 nm.PALS测量结果表明了正电子在氧化铁材料中的寿命成分有三种,值分别约是τ1=150.7 ps,τ2=333.0 ps,τ3=725.0 ps,主要寿命成分是短寿命τ1和中等寿命τ2两种,分别对应的缺陷种类是近似单空位大小的自由体积缺陷和微孔洞缺陷,且其对应的强度比I1/I2值为1.52,表明实验试样的界面缺陷以单空位为主,验证了正电子的寿命越短,湮没率越大,则自由电子密度越大.
语种:
中文
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核类专业“放射性废物处理与处置”课程建设浅议
作者:
曹锦佳;单健;朱志超;王海
期刊:
科技资讯 ,2017年15(26):123-123 ISSN:1672-3791
作者机构:
南华大学核科学技术学院 湖南衡阳 421001;[王海; 朱志超; 曹锦佳; 单健] 南华大学
关键词:
放射性废物处理与处置;教学内容;教学模式;教学评价
摘要:
本文对南华大学核类专业《放射性废物处理与处置》课程建设存在的问题和对策进行了研究.介绍了该课程建设的必要性,以"双一流"作为导向,加强教学内容建设,发展和创新教学模式,积极开展教学评价,打造出一流的教学队伍.
语种:
中文
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“核电厂系统与设备”课程研究型教学模式的探索与实践
作者:
曾文杰;王海;何丽华;程品晶;谢金森
期刊:
高教学刊 ,2017年(3):97-98 ISSN:2096-000X
作者机构:
南华大学 核科学技术学院,湖南 衡阳,421001;[程品晶; 谢金森; 王海; 曾文杰; 何丽华] 南华大学
关键词:
核电厂系统与设备;研究型教学;仿真技术
摘要:
采用研究型教学模式的实验教学课程对学生创新素质培养有重要的实际意义。在“核电厂系统与设备”的课堂教学中转变传统的教学理念,将仿真技术引入教学中,将为传统的基于书本和实物模型的教学到研究型教学模式的运用提供广阔的空间。以PCTran仿真软件为依托,开展“核电厂系统与设备”课程的实验教学。教学实践证明,利用仿真技术是实现“核电厂系统与设备”由传统型教学到研究型教学的良好手段。
语种:
中文
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离子液体中Ln(Ⅲ)/TBP的配位反应研究
作者:
李瑞瑞;田国新;蒋冬梅;袁小兰;夏良树;...
期刊:
原子能科学技术 ,2017年51(3):396-403 ISSN:1000-6931
通讯作者:
Xia, Liang-Shu(xls1966@hotmail.com)
作者机构:
[袁小兰; 李瑞瑞; 夏良树] School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China;[蒋冬梅] School of Innovation and Entrepreneurship, University of South China, Hengyang, 421001, China;[何辉; 田国新] China Institute of Atomic Energy, P.O. Box 275-65, Beijing, 102413, China
通讯机构:
School of Nuclear Science and Technology, University of South China, Hengyang, China
关键词:
离子液体;稳定常数;磷酸三丁酯;钕;铕
摘要:
应用吸收光谱和荧光光谱法研究了在水饱和的1-丁基-3-甲基咪唑双(三氟甲基磺酰亚胺)盐(C_4mimTf_2N)中Ln(Ⅲ)(Ln=Nd、Eu)与磷酸三丁酯(TBP)的配位反应。结果表明:温度分别为10、25、40、55、70 ℃时,Nd(TBP)~(3+)的稳定常数lg分别为0.68±0.03、0.76±0.02、0.89±0.03、0.97±0.03、1.04±0.03,lnβ对100/T在10~70 ℃范围内表现出良好的线性关系,配位反应的焓变在该温度范围内基本保持不变,由范特霍夫方程算得到的Ln(Ⅲ)与TBP配位反应的焓变为11.52 kJ/mol;25 ℃下,Eu(TBP)~(3+)的稳定常数lgβ为0.78±0.06,略大于Nd(TBP)~(3+)的配位稳定常数,与镧系收缩效应一致。
语种:
中文
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聚合物膜氡渗透系数的测定
作者:
程芬;李恒;丘寿康;唐泉
期刊:
原子能科学技术 ,2017年51(9):1698-1703 ISSN:1000-6931
通讯作者:
Tang, Quan(tangquan528@sina.com)
作者机构:
[丘寿康; 程芬; 李恒; 唐泉] School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China
通讯机构:
School of Nuclear Science and Technology, University of South China, Hengyang, China
关键词:
氡;渗透系数;扩散系数
摘要:
为选出适用于我国江门中微子实验的氡屏蔽聚合物膜材料,研究了稳态时利用液体闪烁计数器测定聚合物薄膜氡渗透系数的装置和方法。实验测得了尼龙膜和聚乙烯膜的氡渗透系数并与文献中的数值范围进行了对比,测定结果表明,常用研究材料中尼龙膜的氡渗透系数较低,对降低氡浓度有显著效果。此外实验验证了薄膜氡渗透系数测定的主要影响因素,包括简化计算的方法、系统达到稳态的时长、环境湿度和温度等,并对进一步标准化测定聚合物薄膜的氡渗透系数提出了参考意见。
语种:
中文
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Stabilizing effect of helical current drive on tearing mode
作者:
Xingqiang Lu;Yuan Yun;Xueyu Gong
作者机构:
[Xingqiang Lu; Yuan Yun; Xueyu Gong] School of Nuclear Science and Technology,University of South China
会议名称:
The 2nd International Conference on Matter and Radiation at Extremes(ICMRE 2017)
会议时间:
2017-06-26
会议地点:
中国北京
摘要:
The effect of helical driven current on the m=2/n=l tearing mode are studied numerically in cylindrical geometry using the method of reduced magneto-hydro-dynamic(RMHD) simulation.The results show tha
语种:
英文
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基于衡阳市放射性医疗检查的剂量调查
作者:
李宗伦;陈灿;瞿博志;王晓宇;彭昭缘;...
期刊:
南华大学学报(自然科学版) ,2017年31(3):21-24 ISSN:1673-0062
作者机构:
南华大学 核科学技术学院,湖南衡阳,421001;[陈灿; 胡思勤; 瞿博志; 李宗伦; 王晓宇; 彭昭缘] 南华大学
关键词:
热释光法;放射性诊断;受检者剂量
摘要:
当前,放射性医疗受检者对放射性医疗检查所接收放射性没有足够的认识及相应的重视,导致其年受照剂量可能出现超标现象.因此结合《个人和环境监测用热释光剂量测量系统》,利用热释光法,对衡阳市区部分三甲级医院的X光机对受检者不同体位受照剂量进行调查,为受检者接受放射性检查提供参考.
语种:
中文
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α能谱法多时间段测量^222Rn子体
作者:
王环宇;赵桂芝
期刊:
核电子学与探测技术 ,2017年37(9):924-928 ISSN:0258-0934
作者机构:
南华大学核科学技术学院,湖南 衡阳,421001;[赵桂芝; 王环宇] 南华大学
关键词:
α能谱;222Rn子体;多时间段
摘要:
通过matlab模拟得到多时间段测量222Rn子体的相对偏差与采样时间和测量时间的变化关系,得到优化的采样时间和测量总时间;同时进行多段重组实验,得到优化测量计数段和权重因子。并用最小二乘法方法处理拟合数据,从而提高222Rn子体浓度测量的准确性。实验结果表明:α能谱多段法与其他方法测量结果符合较好,且相对偏差较小,验证了此方法的可靠性。采用多时间段测量222Rn子体并用最小二乘法处理数据的方法,实现了222Rn子体浓度的快速、准确测量。
语种:
中文
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