一种连续测氡延时修正方法
作者：
周青芝;肖德涛;单健;谭延亮;吴喜军;...
期刊：
原子能科学技术 ,2013年47(5):871-874 ISSN：1000-6931
通讯作者：
Xiao, D.-T.(13307478601@ie165.com)
作者机构：
[吴喜军; 谭延亮; 周青芝; 肖德涛; Shan, Jian; 刘凯] School of Nuclear Science and Technology, University of South China, Hengyang 421001, China;[周青芝] China Institute of Atomic Energy, Beijing 102413, China
通讯机构：
School of Nuclear Science and Technology, University of South China, China
关键词：
氡;连续测量;延时修正
摘要：
对空气中氡浓度的连续监测,要求仪器具有良好的时间响应性。本文针对连续测氡中导致延时的各种因素进行分析,研究了一种能消除子体残留影响,可连续测量变化氡浓度的延时修正方法。该方法已应用于南华大学研制的NRL-1连续测氡仪,实验结果表明,该方法有效、可靠。
语种：
中文
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Ultrashort-pulse Mev positron beam generation from intense Compton-scattering γ-ray source driven by laser Wakefield acceleration
作者：
Luo, W.;Zhuo, H. B.* ;Ma, Y. Y.;Yang, X. H.;Zhao, N.;...
期刊：
Laser and Particle Beams ,2013年31(1):89-94 ISSN：0263-0346
通讯作者：
Zhuo, H. B.
作者机构：
[Luo, W.; Zhuo, H. B.] Natl Univ Def Technol, Coll Sci, Changsha 410073, Hunan, Peoples R China.;[Luo, W.; Zhuo, H. B.; Ma, Y. Y.; Zhao, N.; Yang, X. H.] Univ South China, Coll Nucl Sci & Technol, Hengyang, Peoples R China.;[Zhuo, H. B.; Ma, Y. Y.] China Acad Engn Phys, Laser Fus Res Ctr, Mianyang, Peoples R China.;[Yu, M. Y.] Zhejiang Univ, Dept Phys, Inst Fus Theory & Simulat, Hangzhou 310003, Zhejiang, Peoples R China.;[Yu, M. Y.] Ruhr Univ Bochum, Bochum, Germany.
通讯机构：
[Zhuo, H. B.] N;Natl Univ Def Technol, Coll Sci, Changsha 410073, Hunan, Peoples R China.
关键词：
Compton scattering;Femtosecond gamma-ray pulse;Laser wakefield acceleration;Positron beam;Ultrashort
摘要：
Intense Compton-scattering γ-ray radiation driven by laser wakefield acceleration (LWFA) and generation of ultrashort positron beams are investigated by Monte Carlo simulation. Using an LWFA driven GeV electron bunch and a 45 femtosecond, 90 mJ/pulse, and 10AˆHz Ti:Sapphire laser for driving the Compton scattering, fs γ-ray pulses were generated. The latter have a flux of ≥10<sup>8</sup>/s, peak brightness of ≥10<sup>20</sup> photons/(s mm<sup>2</sup> mrad<sup>2</sup> 0.1% bandwidth), and photon energy of 5.9 to 23.2AˆMeV. The γ-ray pulses then impinge on a thin high-Z target. More than 10<sup>7</sup> positrons/s in the form of sub-100 fs pulses at several MeV can be produced. Such ultrashort positron pulses can be useful as the pump-probe type positron annihilation spectroscopy as well as in other applications. Copyright ©Cambridge University Press 2012.
语种：
英文
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A Simple theoretical model for 63 Ni betavoltaic battery
作者：
Zuo, Guoping* ;Zhou, Jianliang;Ke, Guotu
期刊：
Applied Radiation and Isotopes ,2013年82:119-125 ISSN：0969-8043
通讯作者：
Zuo, Guoping
作者机构：
[Zuo, Guoping; Zhou, Jianliang] Univ South China, Sch Nucl Sci & Technol, Hengyang, Peoples R China.;[Ke, Guotu] China Inst Atom Energy, Beijing, Peoples R China.
通讯机构：
[Zuo, Guoping] U;Univ South China, Sch Nucl Sci & Technol, Hengyang, Peoples R China.
关键词：
Betavoltaic battery;Nickel-63;Theoretical model
摘要：
A numerical simulation of the energy deposition distribution in semiconductors is performed for 63Ni beta particles. Results show that the energy deposition distribution exhibits an approximate exponential decay law. A simple theoretical model is developed for 63Ni betavoltaic battery based on the distribution characteristics. The correctness of the model is validated by two literature experiments. Results show that the theoretical short-circuit current agrees well with the experimental results, and the open-circuit voltage deviates from the experimental results in terms of the influence of the PN junction defects and the simplification of the source. The theoretical model can be applied to 63Ni and 147Pm betavoltaic batteries. © 2013 Elsevier Ltd.
语种：
英文
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表面微结构辐射器几何结构对发射性能的影响
作者：
徐继圆;左国平;周剑良
期刊：
发光学报 ,2013年34(10):1386-1391 ISSN：1000-7032
通讯作者：
Zhou, J.-L.(13327341099@189.cn)
作者机构：
[徐继圆; 左国平; 周剑良] School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
通讯机构：
[Zhou, J.-L.] S;School of Nuclear Science and Technology, University of South China, China
关键词：
辐射器;几何尺寸;微腔;发射性能
摘要：
放射性同位素热光伏系统(RTPV)中表面微结构辐射器几何尺寸是决定其发射性能和系统效率的关键因素之一。本文通过对单个钨微腔宽度、高度以及壁厚对辐射器发射性能影响的探讨,初步得出了其红外辐射出射特点的产生原因,并利用时域有限差分算法(FDTD)对不同几何尺寸微腔的发射性能进行了对比。最后结合GaSb量子效率曲线,发现当微腔高度、宽度与壁厚分别为0.8,1.8,0.1 μm时,其发射性能与GaSb匹配程度较好。
语种：
中文
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ASCFR1.0/MC的研制及其在ASCFR固体慢化剂温度效应计算中的初步应用
作者：
李志峰;于涛;谢金森
期刊：
核动力工程 ,2013年34(6):18-23 ISSN：0258-0926
通讯作者：
Li, Z.-F.
作者机构：
[李志峰; 于涛; 谢金森] School of Nuclear Science and Technology, University of South China, Hengyang, Hunan, 421001, China
通讯机构：
School of Nuclear Science and Technology, University of South China, China
关键词：
ASCFR1.0/MC截面库;基准验证;慢化剂温度效应
摘要：
为研制出适用于改进型超临界水冷快堆的精确截面库(ASCFR1.0/MC),并将其应用于温度效应的计算中,首先使用快中子临界基准题JEZEBEL对截面加工程序(NJOY)中各模块的重要参数进行敏感度分析,详细比较不同输入参数对NJOY加工时间以及MCNP程序计算精度的影响,从而选择最为合理的输入参数。在此基础上,以2011年9月发布的ENDF/B-VII.1为基础库研制ASCFR1.0/MC,并针对该库应用多普勒反应性系数基准题进行基准验证。验证结果表明,ASCFR1.0/MC库的计算精度非常理想。最后针对改进型超临界水冷快堆(ASCFR)的固体慢化剂进行温度反应性系数的初步计算,发现ASCFR呈现正的慢化剂温度效应。
语种：
中文
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~(220)Rn子体气溶胶粒径分布测量的方法研究
作者：
单健;赵桐可;肖德涛;刘彦;刘凯;...
期刊：
原子能科学技术 ,2013年47(6):1035-1039 ISSN：1000-6931
通讯作者：
Shan, J.
作者机构：
[Shan, Jian; 刘彦; 刘凯; 丘寿康; 肖德涛; 赵桐可] Institute of Nuclear Science and Technology, University of South China, Hengyang 421001, China
通讯机构：
Institute of Nuclear Science and Technology, University of South China, China
关键词：
~(220)Rn子体;低压级联撞击器;粒径分布;气溶胶
摘要：
应用ELPI系统、α谱仪和能量甄别法测量程序,建立了1套~(220)Rn子体气溶胶活度粒径分布的测量方法;利用该方法收集了南华大学~(220)Rn实验室不同粒径的~(220)Rn子体气溶胶,并进行了~(220)Rn子体气溶胶活度粒径分布测量。实验结果表明:ThB气溶胶的活度中位粒径(AMAD)平均值为237nm,ThC气溶胶的AMAD平均值为245nm。该方法简便易行、测量周期短,能实时得到~(220)Rn子体气溶胶粒子数粒径分布的情况,能同时得到ThB和ThC气溶胶的活度粒径分布情况,且能谱法的测量精度也相对较高。
语种：
中文
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The measurement of low-level 220Rn by software delayed coincidence method
作者：
Yan, Yongjun;Lai, Wei;Zhou, Jianliang
期刊：
Advances in Intelligent Systems and Computing ,2013年180 AISC:407-413 ISSN：2194-5357
通讯作者：
Yan, Y.(yan_jason@163.com)
作者机构：
[Zhou, Jianliang; Yan, Yongjun; Lai, Wei] School of Nuclear Science and Technology, University of South China, Hengyang, China
通讯机构：
[Yan, Y.] S;School of Nuclear Science and Technology, , Hengyang, China
会议名称：
2012 International Conference of Intelligence Computation and Evolutionary Computation, ICEC 2012
会议时间：
7 July 2012 through 7 July 2012
关键词：
comparative experiments;software delayed coincidence
摘要：
This paper introduces a new software delayed coincidence counting technology,which requires less storage space. An experiment system was established for measurement of lowlevel<sup>220</sup>Rn. The methods were validated experimentally by intercomparison measurements. The results show that<sup>220</sup>Rn of decay rate of between 3dpm~20dpm can be measured by the experiment system with error of ±2%, when the background count rate is of 2dpm~4dpm. ©2013 Springer-Verlag.<br/>
语种：
英文
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Measuring radon exhalation rate by tracing the radon concentration of ventilation-type accumulation chamber
作者：
Tan, Yanliang* ;Xiao, Detao;Liu, Xiaosong;Tang, Quan
期刊：
Radiation Measurements ,2013年58:33-36 ISSN：1350-4487
通讯作者：
Tan, Yanliang
作者机构：
[Tan, Yanliang] Hengyang Normal Univ, Dept Phys & Elect, Hengyang 421008, Hunan, Peoples R China.;[Tan, Yanliang; Tang, Quan; Liu, Xiaosong; Xiao, Detao] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Tan, Yanliang] H;Hengyang Normal Univ, Dept Phys & Elect, Hengyang 421008, Hunan, Peoples R China.
关键词：
Radon exhalation rate;Tracing the radon concentration;Ventilation-type accumulation chamber
摘要：
Radon exhalation rate is crucial in the estimation of radiation risk from various materials. RAD7 only focus on the count of the <sup>218</sup>Po in sniff mode, and is well suited to measure radon exhalation rates. This paper presents a fast method for measuring radon exhalation from medium surface with a ventilation-type accumulation chamber by the RAD7 while making the effects of leakage and back diffusion negligible. The radon exhalation rate can be obtained from the measured values before radioactive equilibrium between Radon and progeny occurs. This method is based on the principle for tracing radon concentration changes by deriving <sup>222</sup>Rn concentrations through <sup>218</sup>Po measurements. Several radon exhalation rate measurements of medium surface have been performed in the Radon Laboratory of the University of South China. The radon exhalation rates obtained by verification experiments are within the accepted values for the reference value. ©2013 Elsevier Ltd. All rights reserved.
语种：
英文
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Measuring radon exhalation rate in two cycles avoiding the effects of back-diffusion and chamber leakage
作者：
Tan, Yanliang* ;Xiao, Detao
期刊：
Environmental Monitoring and Assessment ,2013年185(10):8759-8765 ISSN：0167-6369
通讯作者：
Tan, Yanliang
作者机构：
[Tan, Yanliang] Hengyang Normal Univ, Dept Phys & Elect, Hengyang 421008, Peoples R China.;[Tan, Yanliang; Xiao, Detao] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Tan, Yanliang] H;Hengyang Normal Univ, Dept Phys & Elect, Hengyang 421008, Peoples R China.
关键词：
Radon exhalation rate;Two cycles;Back-diffusion;Leakage
摘要：
This paper will present a simple method for measuring the radon exhalation rate from the medium surface in two cycles and also avoiding the effects of back-diffusion and chamber leakage. The method is based on a combination of the "accumulation chamber" technique and a radon monitor. The radon monitor performs the measurement of the radon concentration inside the accumulation chamber, and then the radon exhalation rate can be obtained by simple calculation. For reducing the systematic error and the statistical uncertainty, too short of total measurement time is not appropriate, and the first cycle time should be about 70 % of the total measurement. The radon exhalation rate from the medium surface obtained through this method is in good agreement with the reference value. This simple method can be applied to develop and improve the instruments for measuring radon exhalation rate. © 2013 Springer Science+Business Media Dordrecht.
语种：
英文
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A novel method to measure the radon exhalation rate in only one measurement cycle
作者：
Tan, Yanliang* ;Xiao, Detao
期刊：
ANALYTICAL METHODS ,2013年5(3):805-808 ISSN：1759-9660
通讯作者：
Tan, Yanliang
作者机构：
[Tan, Yanliang] Hengyang Normal Univ, Dept Phys & Elect, Hengyang 421008, Hunan, Peoples R China.;[Tan, Yanliang; Xiao, Detao] Univ S China, Sch Nucl Sci & Technol, Hengyang 4210011, Hunan, Peoples R China.
通讯机构：
[Tan, Yanliang] H;Hengyang Normal Univ, Dept Phys & Elect, Hengyang 421008, Hunan, Peoples R China.
摘要：
A novel method was proposed to measure the radon exhalation rate in only one measurement cycle. We obtain the radon concentration variety regulation in the internal cell of the RAD7 by analyzing the work principle of RAD7 and the radon concentration variety regulation in the ventilation-type accumulation chamber when the effects of leakage and back diffusion are neglected. This method uses the measured value before the radon concentration in the ventilation-type accumulation chamber reaches a steady state. Several radon exhalation rate measurements of the medium surface have been performed in the Radon Laboratory of the University of South China. The radon exhalation rates obtained by verification experiments are in good agreement with the reference value. This simple, accurate and fast method can be applied to develop and improve the instruments for measuring radon exhalation rates. © The Royal Society of Chemistry 2013.
语种：
英文
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Revision for measuring radon exhalation rate in open loop
作者：
Tan, Y.* ;Xiao, D.;Yuan, H.;Tang, Q.;Liu, X.
期刊：
Journal of Instrumentation ,2013年8(1):T01004 ISSN：1748-0221
通讯作者：
Tan, Y.
作者机构：
[Yuan, H.; Tan, Y.] Hengyang Normal Univ, Dept Phys & Elect, Hengyang City, Peoples R China.;[Xiao, D.; Tang, Q.; Liu, X.; Tan, Y.] Univ South China, Sch Nucl Sci & Technol, Hengyang City, Peoples R China.;[Tan, Y.] Hengyang Normal Univ, Dept Phys & Elect, Huangbai Rd, Hengyang City, Peoples R China.
通讯机构：
[Tan, Y.] H;Hengyang Normal Univ, Dept Phys & Elect, Huangbai Rd, Hengyang City, Peoples R China.
关键词：
Data acquisition concepts;Detector control systems (detector and experiment monitoring and slow-control systems, architecture, hardware, algorithms, databases);Models and simulations
摘要：
We propose a novel method for quickly measuring the radon exhalation rate in open loop. We first obtain the temporal variation of radon concentration in the internal cell of the RAD7 by analyzing the work principle of RAD7. We then obtain the temporal variation of radon concentration in the ventilation-type accumulation chamber when the effects of leakage and back diffusion are neglected. This method uses the measured value before the radon concentration in the ventilation-type accumulation chamber reaches a steady state. The diameter of the air input tube to the ventilation-type accumulation is large enough to keep the differential pressure in the accumulation chamber and outdoors negligible. Short cycle time and large flow rate will be appropriate for reducing measurement error. Several radon exhalation rate measurements of the medium surface have been performed in the Radon Laboratory of the University of South China. The radon exhalation rates obtained by verification experiments are in good agreement with the reference value. This method can be applied to develop and improve the instruments for measuring radon exhalation rate.
语种：
英文
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氡子体α能谱真空测量RaB的反冲损失率
作者：
肖德涛;刘凯;周青芝;单健;丘寿康;...
期刊：
原子能科学技术 ,2013年47(5):854-859 ISSN：1000-6931
通讯作者：
Xiao, D.-T.
作者机构：
[丘寿康; 肖德涛; 刘凯; 周青芝; 许艳婷; Shan, Jian; 傅燕] 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, China
关键词：
氡子体;反冲损失率
摘要：
氡子体α能谱法测量时的真空度使RaB发生反冲损失,这会对氡子体测量精度产生影响并造成测量腔室的污染。本实验选用0.8μm孔径的Millipore AA型滤膜,在流率为6.3、12.3和15.6L/min下,使用ELPI粒径分析仪、α测量仪和α谱仪分别对氡室气溶胶粒径分布、滤膜自吸收系数及反冲损失率进行测量。结果显示:氡室内气溶胶浓度呈单峰分布;相应流率下的自吸收系数为0.978、0.980、0.989,反冲损失率为0.362 8、0.368 4和0.362 9;所得反冲损失率并未表现出较大的差异,但滤膜样品上由RaA衰变产生的RaB原子却有较大的反冲损失。
语种：
中文
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BaF_2闪烁体探测器信号数字化方法研究
作者：
赵健;贺国珠;颜拥军;张奇玮;周祖英
期刊：
原子能科学技术 ,2013年47(4):669-673 ISSN：1000-6931
通讯作者：
Yan, Y.-J.(yan_jason@163.com)
作者机构：
[颜拥军; 赵健] School of Nuclear Science and Technology, University of South China, Hengyang 421001, China;[周祖英; 张奇玮; 赵健; 贺国珠] China Institute of Atomic Energy, Beijing 102413, China
通讯机构：
School of Nuclear Science and Technology, University of South China, China
关键词：
BaF_2闪烁体;波形甄别
摘要：
应用数字化方法对BaF_2闪烁体探测器脉冲信号进行了研究,信号的测量通过FADC和计算机系统实现,并对所采集的脉冲波形进行了离线分析。通过计算脉冲波形的面积提取了射线的能量信息,重建了能谱,并与传统电子学模拟信号测量方法得到的能谱进行了比较;应用过阈定时方法提取了脉冲的时间信息,测量并给出了4πBaF_2探测器系统的时间分布谱;应用脉冲形状甄别法对α粒子和γ射线进行了鉴别研究,根据脉冲信号快/慢成分比的差别清楚地将α粒子从γ射线中鉴别开来。本工作为在γ全吸收型4πBaF_2探测器系统中应用FADC进行多通道、多参数、大数据量数字化数据获取积累了经验。
语种：
中文
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Comparative study of chance coincidence correction in measuring 223 Ra and 224 Ra by delay coincidence method
作者：
颜拥军;黄德荣;周剑良;丘寿康
期刊：
原子能科学技术 ,2013年47(8):1450-1457 ISSN：1000-6931
通讯作者：
Yan, Y.-J.
作者机构：
[周剑良; 丘寿康; 颜拥军; 黄德荣] 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, China
关键词：
延迟符合法;偶然符合修正;镭同位素;氡同位素
摘要：
延迟符合法测量220 Rn和219 Rn是间接测量天然水中224 Ra和223 Ra的方法,能提供河口海洋混合区海底地下水流出情况及水与土壤相互作用的示踪信息。在实际测量计算中会用到Moore偶然符合修正方法,然而研究发现,Giffin和Moore方法还存在某些不完善之处。本文在Moore和Giffin方法的基础上,对Moore方法进行了改进（简称方法1）,同时提出了新的偶然符合修正公式（简称方法2）;构建实验装置分别测量低活度222 Rn、220 Rn、219 Rn源及220 Rn和219 Rn混合源,对偶然符合修正公式进行比对实验验证。结果表明,总计数率小于70min-1时,本工作提出的两种方法在准确度和误差方面均较Moore和Giffin方法有所改善。
语种：
中文
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连续测氡方法迭代修正因子的理论计算与实验测定
作者：
何正忠;肖德涛;赵桂芝;丘寿康;单健;...
期刊：
原子能科学技术 ,2013年47(6):1040-1043 ISSN：1000-6931
通讯作者：
Xiao, D.-T.(13307478601@189.cn)
作者机构：
[丘寿康; 赵桂芝; 欧阳琦; 傅燕; 何正忠; 肖德涛; 吴喜军; Shan, Jian] 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, China
关键词：
氡浓度;静电收集;迭代修正因子;连续测氡
摘要：
研究了一种连续测量环境氡浓度的方法,该方法需确定前次测量对当次测量的影响,即迭代修正因子。推导了适用于上述连续测氡方法的迭代修正因子的理论公式,并计算了迭代修正因子的理论值。用基于上述方法研制的NRL-1型氡连续测量仪进行了迭代因子的测量,并对测量结果的影响因素进行了讨论。结果表明,理论计算结果与实验测量结果符合较好,迭代修正因子仅与取样时间和测量时间有关。
语种：
中文
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Biosorption of Cd(II) by live and dead cells of Bacillus cereus RC-1 isolated from cadmium-contaminated soil
作者：
Huang, Fei;Dang, Zhi* ;Guo, Chu-Ling;Lu, Gui-Ning;Gu, Roy R.;...
期刊：
Colloids and Surfaces B: Biointerfaces ,2013年107:11-18 ISSN：0927-7765
通讯作者：
Dang, Zhi
作者机构：
[Zhang, Hui; Guo, Chu-Ling; Huang, Fei; Lu, Gui-Ning; Dang, Zhi] S China Univ Technol, Sch Environm & Energy, Guangzhou 510006, Guangdong, Peoples R China.;[Guo, Chu-Ling; Lu, Gui-Ning; Dang, Zhi] Minist Educ, Key Lab Pollut Control & Ecosyst Restorat Ind Clu, Guangzhou 510006, Guangdong, Peoples R China.;[Gu, Roy R.] Iowa State Univ, Dept Civil Construct & Environm Engn, Ames, IA 50011 USA.;[Liu, Hong-Juan] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Dang, Zhi] S;S China Univ Technol, Sch Environm & Energy, Guangzhou 510006, Guangdong, Peoples R China.
关键词：
Bacillus cereus;Biosorption;Cadmium;Dead cells;Live cells
摘要：
The present study investigated the biosorption capacity of live and dead cells of Bacillus cereus RC-1 for Cd(II). The biosorption characteristics were investigated as a function of initial pH, contact time, and initial cadmium concentration. Equilibrium biosorption was modeled using Langmuir, Freundlich and Redlich-Peterson isotherm equations. It was found that the maximum biosorption capacities calculated from Langmuir isotherm were 31.95. mg/g and 24.01. mg/g for dead cells and live cells, respectively. The kinetics of the biosorption was better described by pseudo-second order kinetic model. Desorption efficiency of biosorbents was investigated at various pH values. These results indicated that dead cells have higher Cd(II) biosorption capacity than live cells. Furthermore, zeta potential, transmission electron microscopy (TEM), scanning electron microscopy (SEM) coupled with energy dispersive X-ray (EDX), and Fourier transform infrared spectroscopy (FTIR) studies were carried out to understand the differences in the Cd(II) biosorption behavior for the both biosorbents. The bioaccumulation of Cd(II) by B. cereus RC-1 was found to depend largely on extracellular biosorption rather than intracellular accumulation. Based on the above studies, dead biomass appears to be a more efficient biosorbent for the removal of Cd(II) from aqueous solution. © 2013 Elsevier B.V.
语种：
英文
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确定大气颗粒物平均滞留时间的新方法
作者：
Liu Ya-Chun*
期刊：
物理学报 ,2013年62(9):91-97 ISSN：1000-3290
通讯作者：
Liu Ya-Chun
作者机构：
[Liu Ya-Chun] Univ South China, Sch Math & Phys Sci, Hengyang 421001, Peoples R China.;[Liu Ya-Chun] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Liu Ya-Chun] U;Univ South China, Sch Math & Phys Sci, Hengyang 421001, Peoples R China.
关键词：
大气颗粒物;平均滞留时间;氡子体;监测
摘要：
从低层大气的基本属性出发,利用大气颗粒物中放射性核素的衰变特性与转移速率等相关信息,建立了单位体积大气颗粒物中被吸附的放射性粒子数、衰变粒子数和转移粒子数的数学模型,获得了确定低层大气颗粒物平均滞留时间的新方法.该方法解决了当前相关研究中出现的困惑,说明了大气具有有限的自净功能,给出了大气颗粒物中同一衰变链上各核素达到活度平衡的条件及降低平均滞留时间的途径,为大气环境的监测与治理提供了科学依据.
语种：
中文
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重离子微米孔膜防尘口罩滤芯的研制
作者：
梁海英;吴振东;刘永辉;马晓;吴家键
期刊：
原子能科学技术 ,2012年46(B09):745-748 ISSN：1000-6931
通讯作者：
Liang, H.-Y.
作者机构：
[吴家键; 梁海英; 吴振东; 马晓; 刘永辉] China Institute of Atomic Energy, P. O. Box 275-118, Beijing 102413, China;[马晓] School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
通讯机构：
China Institute of Atomic Energy, P. O. Box 275-118, China
会议名称：
第八届(2012)北京核学会核应用技术学术交流会
会议时间：
2012-10-01
会议地点：
北京
会议论文集名称：
第八届(2012)北京核学会核应用技术学术交流会论文集
关键词：
重离子微孔膜;防尘口罩;过滤效率;呼吸阻力
摘要：
本文以重离子微孔膜作为主要过滤材料,研制出一款梳格结构的新型防尘口罩滤芯。经国家权威机构测试,该口罩滤芯过滤效率为99.7%,达到国家标准GB 2626—2006《呼吸防护用品——自吸过滤式防颗粒物呼吸器》KN95的标准;呼吸阻力小于180Pa,低于国家标准350Pa。
语种：
中文
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不同土壤氡分布的数值模拟
作者：
申超;陈凌;肖德涛;谭延亮
期刊：
原子能科学技术 ,2012年46(3):370-374 ISSN：1000-6931
通讯作者：
Shen, C.
作者机构：
[申超; 肖德涛; 陈凌] School of Nuclear Science and Technology, University of South China, Hengyang 421001, China;[谭延亮] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;[陈凌] China Institute of Atomic Energy, P. O. Box 275-24, Beijing 102413, China
通讯机构：
School of Nuclear Science and Technology, University of South China, China
关键词：
土壤氡;取样深度;影响因素
摘要：
通过考虑砂土等6种均匀土壤及典型层状土壤的情况,对土壤氡分布进行数值模拟,对扩散系数、孔隙度、降水等对土壤氡分布有影响的因素进行研究,并对因土壤中镭分布而致氡异常分布进行相应分析。分析发现,土壤中的氡浓度随土壤深度的增加而增大。
语种：
中文
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纳米孔径重离子微孔膜的制备
作者：
刘庆云;周剑良;刘永辉;吴振东
期刊：
原子能科学技术 ,2012年46(3):341-345 ISSN：1000-6931
通讯作者：
Liu, Q.-Y.
作者机构：
[刘庆云] 南华大学核科学技术学院,湖南衡阳421001;[刘庆云] 中国原子能科学研究院核物理研究所,北京102413;南华大学核科学技术学院,湖南衡阳,421001;中国原子能科学研究院核物理研究所,北京,102413;[刘永辉; 吴振东] 中国原子能科学研究院核物理研究所
通讯机构：
School of Nuclear Science and Technology, University of South China, China
关键词：
重离子;纳米微孔膜;聚对苯二甲酸乙二醇酯;电导蚀刻法
摘要：
应用中国原子能科学研究院HI-13串列加速器产生的重离子~(32)S和~(79)Br轰击聚对苯二甲酸乙二醇酯(PET)薄膜,再对薄膜进行化学蚀刻处理使由重离子辐照损伤产生的潜径迹形成微孔,制备出孔径为100~900nm的重离子微孔膜。为增加径迹蚀刻速率与体蚀刻速率之比,化学蚀刻前采用紫外光辐照薄膜。蚀刻过程中采用电导蚀刻法监测膜孔径生长过程。对~(32)S和~(79)Br辐照制备的重离子微孔膜进行了比较,~(79)Br离子辐照制备的微孔膜与~(32)S离子辐照制备的微孔膜相比,孔型圆整,锥角更小;在制备纳米微孔膜方面~(79)Br离子优于~(32)S离子。
语种：
中文
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