MIM plasmonic waveguide splitter with tooth-shaped structures
作者：
Xiang, Dong* ;Li, Weijun
期刊：
Journal of Modern Optics ,2014年61(3):222-226 ISSN：0950-0340
通讯作者：
Xiang, Dong
作者机构：
[Xiang, Dong] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Li, Weijun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Xiang, Dong] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
metal-insulator-metal waveguide;plasmonic splitter;surface plasmon polaritons;zigzag-shaped waveguide
摘要：
A plasmonic splitter based on subwavelength metal-insulator-metal (MIM) waveguides with tooth-shaped structures is proposed and numerically researched by using the finite-difference time-domain (FDTD) method in visible and near infrared frequencies. The splitter is regarded as two zigzag-shaped MIM waveguides, which naturally stretch out two tooth structures in bending corners. Each tooth forms a resonant cavity. The transmission of the zigzag-shaped waveguide is close to zero at some resonant wavelength of the tooth cavity. The same-order resonant wavelength has an approximately linear relationship with the depth of the tooth. When the geometric parameters of the two zigzag-shaped waveguides of teeth are suitably initialized, both frequency splitter and power splitter can be simply achieved. ©2014 ©2014 Taylor &Francis.
语种：
英文
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基于动理论模型的一维等离子体电磁波传输特性分析
作者：
Chen Wen-Bo* ;Gong Xue-Yu;Lu Xing-Qiang;Feng Jun;Liao Xiang-Bai;...
期刊：
物理学报 ,2014年63(21):80-84 ISSN：1000-3290
通讯作者：
Chen Wen-Bo
作者机构：
[Liao Xiang-Bai; Gong Xue-Yu; Deng Xian-Jun; Chen Wen-Bo; Feng Jun; Huang Guo-Yu] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Lu Xing-Qiang] Univ South China, Sch Nucl Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Chen Wen-Bo] U;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
关键词：
麦克斯韦-玻尔兹曼;动理论;时域有限差分法;等离子体
摘要：
本文采用了动理论模型对电磁波在等离子体中的传播特性进行了研究.建立了与该模型相关的麦克斯韦-玻尔兹曼（MB）方程组,并采用FDTD方法加以求解,得到了等离子体区域内的粒子分布函数及空间中的电场分布.此外,本文还计算了电磁波入射到等离子体平板上的反射及透射系数,并将数值计算结果与解析解结果进行了比较,验证了该方法的正确性.
语种：
中文
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Pathway competition of H+ in intense femtosecond laser fields
作者：
Guo, Wei* ;Feng, Xiaojing;Lu, Xingqiang
期刊：
Russian Journal of Physical Chemistry A ,2014年88(7):1222-1227 ISSN：0036-0244
通讯作者：
Guo, Wei
作者机构：
[Guo, Wei; Feng, Xiaojing] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Lu, Xingqiang] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Guo, Wei] U;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
关键词：
bond softening;above-threshold dissociation;Coulomb explosion;light-stressed states
摘要：
We experimentally measured the kinetic energy and angular distributions of fragment ion H<sup>+</sup> of H<inf>2</inf> as a function of 810 nm femtosecond laser intensity by using velocity map imaging technique. The reasonable origination of dissociation channels (1.0) and (1.1) are proposed. The analysis of the angular distribution indicates the net two-photon pathway via the 3ωcrossing dominates over the direct one-photon pathway in channel (1.0). The relative yield of fragment peaks indicates that dissociation and ionization of H <inf>2</inf> <sup>+</sup> are competitive. The lower laser intensities emphasize the dissociation probability of H <inf>2</inf> <sup>+</sup>, and the higher laser intensities favor higher ionization stages. ©2014 Pleiades Publishing, Ltd.
语种：
英文
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Microstructure and performance of laser cladding layer of FCo-5 alloy powder on nuclear valve sealing surface
作者：
李必文;张春良;金坤文
期刊：
粉末冶金材料科学与工程 ,2014年19(1):159-164 ISSN：1673-0224
通讯作者：
Zhang, C.-L.(nhzcl@163.com)
作者机构：
[李必文; 张春良] School of Nuclear Science and Technology, University of South China, Hengyang 421001, China;[张春良; 金坤文; 李必文] School of Mechanical Engineering, University of South China, Hengyang 421001, China
通讯机构：
[Zhang, C.-L.] S;School of Nuclear Science and Technology, University of South China, China
关键词：
FCo-5钴基合金粉末;核阀密封面;激光熔覆层;组织;硬度
摘要：
以FCo-5自熔性钴基合金粉末为堆焊材料，在0Cr18Ni12Mo3Ti核阀试样表面制备厚度为2.04 mm、横截面单圆弧拟合半径为2.69 mm的密封面激光熔覆层。利用SEM和XRD分析熔覆层的微观结构和物相，测试熔覆层的显微硬度及最小厚度处的高温硬度。结果表明：熔覆层从界面到表层的结晶形态依次由平面晶向胞状树枝晶、多方向生长树枝晶、细小树枝晶过渡；中、上部组织主要由γ-Co 奥氏体枝晶、枝晶间层片状共晶组织以及弥散分布的Cr23C6硬质颗粒组成；在距界面1.52～1.60 mm的区域，密封带宽度为2.95～3.18 mm，常温硬度阈值为44.3～45 HRC；在650℃以下时，熔覆层最小厚度处具有优异的抗蠕变性能和高温硬度特性，经720℃以上回火处理后有较强的二次硬化效应。
语种：
中文
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Generation of bright attosecond x-ray pulse trains via Thomson scattering from laser-plasma accelerators
作者：
Luo, W.;Yu, T. P.;Chen, M.;Song, Y. M.;Zhu, Z. C.* ;...
期刊：
Optics Express ,2014年22(26):32098-32106 ISSN：1094-4087
通讯作者：
Zhu, Z. C.
作者机构：
[Luo, W.; Zhu, Z. C.; Song, Y. M.] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Yu, T. P.; Zhuo, H. B.; Ma, Y. Y.] Natl Univ Def Technol, Coll Sci, Changsha 410073, Hunan, Peoples R China.;[Chen, M.] Shanghai Jiao Tong Univ, Dept Phys & Astron, Minist Educ, Key Lab Laser Plasmas, Shanghai 200240, Peoples R China.
通讯机构：
[Zhu, Z. C.] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
Attosecond pulses;Backscattering;Hard x rays;High harmonic generation;Synchrotron radiation;Thomson scattering
摘要：
Generation of attosecond x-ray pulse attracts more and more attention within the advanced light source user community due to its potentially wide applications. Here we propose an all-optical scheme to generate bright, attosecond hard x-ray pulse trains by Thomson backscattering of similarly structured electron beams produced in a vacuum channel by a tightly focused laser pulse. Design parameters for a proof-of-concept experiment are presented and demonstrated by using a particle-in-cell code and a four-dimensional laser-Compton scattering simulation code to model both the laser-based electron acceleration and Thomson scattering processes. Trains of 200 attosecond duration hard x-ray pulses holding stable longitudinal spacing with photon energies approaching 50 keV and maximum achievable peak brightness up to 1020 photons/s/mm2/mrad2/0.1%BW for each micro-bunch are observed. The suggested physical scheme for attosecond x-ray pulse trains generation may directly access the fastest time scales relevant to electron dynamics in atoms, molecules and materials.
语种：
英文
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核电厂数字化人-机界面监视转移路径预测方法及其应用
作者：
胡鸿;张力;蒋建军;易灿南;戴立操;...
期刊：
核动力工程 ,2014年35(3):105-110 ISSN：0258-0926
通讯作者：
Hu, H.
作者机构：
[胡鸿] College of Nuclear Science and Technology, University of South China, Hengyang, HuNan, 421001, China;[张力; 易灿南; 陈青青; 胡鸿] Ergonomics and Safety Management Institute, Hunan Institute of Technology, Hengyang, Hunan, 421001, China;[戴立操; 张力; 蒋建军] Human Factors Institute, University of South China, Hengyang, Hunan, 421001, China
通讯机构：
College of Nuclear Science and Technology, University of South China, China
关键词：
核电厂;数字化人-机界面;监视转移;路径预测;马尔可夫过程
摘要：
核电厂操纵员在监视核电厂数字化人-机界面参数信息时,某些时刻难以判断下一个最可能的监视目标,从而导致监视延迟或转移失误的情况。为更好研监视路径预测问题,提出基于马尔可夫过程的监视过程预测路径规划方法,包括监视过程预测路径模型、监视过程预测路径规划算法、转移路径成功率算法。基于提出的方法,对核电厂蒸汽发生器传热管破裂事故操纵员监视转移行为进行分析,以数字化人-机界面作为t时刻监视任务的信息源节点,可以准确预测到下一个监视目标的转移路径,提高操纵员监视绩效并成功地降低监视失误风险。
语种：
中文
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A simple model for automatically measuring radon exhalation rate from medium surface
作者：
Tan, Yanliang* ;Xiao, Detao
期刊：
Radiation Measurements ,2014年64:44-47 ISSN：1350-4487
通讯作者：
Tan, Yanliang
作者机构：
[Tan, Yanliang] Hengyang Normal Univ, Dept Phys & Elect, Hengyang City 421008, Hunan, Peoples R China.;[Tan, Yanliang; Xiao, Detao] Univ South China, Sch Nucl Sci & Technol, Hengyang City 421001, Hunan, Peoples R China.;[Tan, Yanliang] Hengyang Normal Univ, Dept Phys & Elect, Huangbai Rd 165, Hengyang City 421008, Hunan, Peoples R China.
通讯机构：
[Tan, Yanliang] H;Hengyang Normal Univ, Dept Phys & Elect, Huangbai Rd 165, Hengyang City 421008, Hunan, Peoples R China.
关键词：
Simple model;Radon exhalation rate;Sufficient condition
摘要：
A simple model to measure radon exhalation rate from medium surface is developed in this paper. This model is based on a combination of the "accumulation chamber" technique and a radon monitor. The radon monitor is used to perform measurement of radon concentration evolution inside the accumulation chamber, and radon exhalation rate is evaluated via nonlinear least-square fitting of the measured data. If the flow rate of the pump is high enough, radon concentration in the detector's internal cell becomes to be equal to that in the accumulation chamber quickly, and the simple model for measuring the radon exhalation rate can be generated analytically. Generally, the pump flow rate of radon monitor is low, not satisfying the condition. We find other sufficient conditions of this simplified model. On these conditions, the radon exhalation rate can be calculated accurately through this model even the flow rate of the pump is not so high. This method can be applied to develop and improve the instruments for measuring the radon exhalation rate. ©2014 Elsevier Ltd. All rights reserved.
语种：
英文
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Study on tritium safety for the tritium system of China TBM
作者：
Fu, Wan Fa;Lu, Jian Mei;Luo, De Li* ;Tang, Tao
期刊：
Journal of Chemical and Pharmaceutical Research ,2014年6(6):116-118 ISSN：0975-7384
通讯作者：
Luo, De Li
作者机构：
[Fu, Wan Fa] School of Nuclear Science and Technology, University of South China, Hengyang, China;[Fu, Wan Fa; Luo, De Li; Tang, Tao] Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang, China;[Lu, Jian Mei] School of Foreign Languages and Cultures, Southwest University of Science and Technology, Mianyang, China
摘要：
Tritium safety research on the tritium system of Test Blanket Module (TBM) was carried out. At first, according to safety conception of multiple containment systems, a possible layout of TBM tritium system was designed and analyzed. Secondly, according to safety analysis task and method of the tritium system, the research framework about tritium safety analysis was given. At last, in order to compare and assess safety grade about the tritium system among all kinds of nuclear facilities, calculation formula was given. ©2014, Journal of Chemical and Pharmaceutical Research. All rights reserved.
语种：
英文
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基于γ全吸收型BaF2探测装置的波形分析和定时方法研究
作者：
张奇玮;贺国珠;黄兴;阮锡超;李志宏;...
期刊：
原子能科学技术 ,2014年48(S1):612-617 ISSN：1000-6931
通讯作者：
Zhang, Qi-Wei
作者机构：
[李志宏; 阮锡超; 张奇玮; 贺国珠; 黄兴] Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy, Beijing , China;[朱兴华] Huaneng Shandong Shidao Bay Nuclear Power Co., Ltd., Rongcheng , China;[黄兴] School of Nuclear Science and Technology, University of South China, Hengyang , China
通讯机构：
Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy, Beijing, China
会议名称：
北京核学会第十届(2014)核应用技术学术交流会
会议时间：
2014-10-11
会议地点：
武汉
会议论文集名称：
北京核学会第十届(2014)核应用技术学术交流会论文集
关键词：
γ全吸收型BaF2探测装置;波形分析;定时方法
摘要：
中国原子能科学研究院正在建造的γ全吸收型BaF2探测装置用于精确测量keV能区的中子俘获反应截面。本文应用FlashADC采集得到装置输出的脉冲信号,通过波形的面积积分获取60 Co和137 Cs源的能谱,并与传统电子学测量结果进行比较。结果表明,应用3种数字化波形分析方法(脉冲形状鉴别、基线补偿和时间窗限定)有效剔除了BaF2探测器自身固有的α粒子和电子学噪声的本底。采用多种定时方法研究了γ射线
语种：
中文
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Effect of the plasma shapes on intrinsic rotation due to collisionless ion orbit loss in the tokamak edge plasmas
作者：
Ou, Jing* ;Wu, Guojiang;Li, Xinxia
期刊：
PHYSICS OF PLASMAS ,2014年21(7):072505 ISSN：1070-664X
通讯作者：
Ou, Jing
作者机构：
[Ou, Jing; Wu, Guojiang; Li, Xinxia] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China.;[Ou, Jing] Chinese Acad Sci, Ctr Magnet Fus Theory, Hefei 230031, Peoples R China.;[Li, Xinxia] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Ou, Jing] C;Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China.
关键词：
plasma boundary layers;plasma flow;plasma toroidal confinement;plasma transport processes;Tokamak devices
摘要：
Distribution of the intrinsic rotation due to collisionless ion orbit loss near the tokamak edge region is studied by using an analytical model based on ion guiding center orbit approximation. A peak of the averaged ion orbit loss momentum fraction is found very near inside the separatrix region in a double null divertor configuration but is not found inside the last closed flux surface region in an outer limiter configuration. For the double null divertor configuration, the intrinsic rotation due to ion orbit loss depends on the plasma shape. With the increase in elongation and triangularity, the peak of the averaged ion orbit loss momentum fraction increases and it moves inward for the lower plasma current.
语种：
英文
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The nonlinear effect in relativistic Compton scattering for an intense circularly polarized laser
作者：
Luo, W.* ;Zhuo, H. B.;Ma, Y. Y.;Zhu, Z. C.;Fan, G. T.;...
期刊：
PHYSICA SCRIPTA ,2014年89(7) ISSN：0031-8949
通讯作者：
Luo, W.
作者机构：
[Luo, W.; Zhu, Z. C.; Song, Y. M.] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Luo, W.; Zhuo, H. B.; Ma, Y. Y.] Natl Univ Def Technol, Coll Sci, Changsha 410073, Hunan, Peoples R China.;[Fan, G. T.; Xu, W.] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
通讯机构：
[Luo, W.] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
Compton light source;nonlinear effect;harmonic radiation;Monte Carlo simulation;circularly polarized laser
摘要：
Compton scattering between an intense laser pulse and a relativistic electron beam offers a promising development path toward high-energy, high-brightness x- and gamma-ray sources. Increasing laser peak power to obtain intense x- and gamma rays causes nonlinear Compton scattering to occur. To predict high-order harmonic radiation properties, we upgrade a Monte Carlo laser-Compton scattering simulation code (MCLCSS) by taking into account the nonlinear effect for the relativistic Compton scattering process. The energy spectra and angular and harmonic intensity distributions of the scattered photons are investigated using nonlinear Compton scattering of an intense circularly polarized laser. It is found that the laser parameter plays an important role in the generation of high-order harmonic radiation. Our study also suggests that the high-energy tails of the second and higher harmonics will stray from the backscattering region. ©2014 The Royal Swedish Academy of Sciences.
语种：
英文
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固体~(219)Rn源的γ能谱法放射性纯度检验
作者：
唐泉;安小刚;丘寿康
期刊：
原子能科学技术 ,2014年48(12):2381-2386 ISSN：1000-6931
通讯作者：
Tang, Quan
作者机构：
[丘寿康; 唐泉; 安小刚] School of Nuclear Science and Technology, University of South China, Hengyang, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
关键词：
γ能谱法;固体~(219)Rn源;延迟符合测量
摘要：
对利用从铀矿石中提取得到的~(227)Ac制备的固体~(219)Rn源进行了γ能谱分析,确定了~(227)Ac的4个子体核素~(227)Th、~(223)Ra、~(219)Rn和~(211)Bi的活度,并分析了能对~(219)Rn造成干扰的~(222)Rn、~(220)Rn母体核素~(226)Ra、 ~(224) Ra的活度。待~(227)Ac及其子体达到放射性平衡后,通过测量~(227)Th的235.97、256.25keV,~(223)Ra的154.21keV,~(219)Rn的401.81keV,~(211)Bi的351.059keV共5条γ射线,最终确定固体~(219)Rn源中~(227)Th、 ~(223)Ra、~(219)Rn和~(211)Bi的活度为(1 069±3)、(1 079±5)、(1 095±13)、(1 096±14)和(11 089±4)Bq,固体~(219)Rn源的平均活度为(1 093±8)Bq;通过测量~(224) Ra子体212Pb的238.632keV、~(208)Tl的583.191keVγ射线以及~(226)Ra子体~(214)Bi的609.312、1 120.287keVγ射线得到~(226)Ra与~(224) Ra的平均活度分别为5.12Bq及0.433Bq,远低于固体~(219)Rn源的平均活度,说明固体~(219)Rn源放射性纯度较高。以上结果表明,此源有望制成标准固体~(219)Rn源以用于延迟符合法测~(223)Ra、~(227)Ac装置的刻度。
语种：
中文
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基于α能谱法~(220)Rn子体连续测量方法研究
作者：
吴喜军;肖德涛;单健;李志强;丘寿康;...
期刊：
原子能科学技术 ,2014年48(12):2375-2380 ISSN：1000-6931
通讯作者：
Xiao, De-Tao
作者机构：
[丘寿康; 李志强; 吴喜军; 何正忠; 李超; 肖德涛; Shan, Jian] School of Nuclear Science and Technology, University of South China, Hengyang, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
关键词：
~(220)Rn子体;累积活度函数;连续测量;α能谱法
摘要：
本文基于α能谱法建立了无需频繁更换滤膜的~(220)Rn子体连续测量方法,并在南华大学氡实验室开展了与标准~(220)Rn子体参考水平定值方法的~(220)Rn子体水平测量的对比研究。结果表明:在高~(220)Rn子体水平测量环境中,ThB和ThC 8个测量周期的测量结果与参考方法的测量结果相差5.0%与7.0%左右。在低~(220)Rn子体水平测量环境中,ThB 4个测量周期的测量结果与参考方法的测量结果相差控制在4.5%以内,ThC的控制在10.0%左右。在~(220)Rn子体水平为100 Bq/m~3左右的测量环境中,ThB和 ThC的总不确定度均控制在5%左右;采样过程中沉积在滤膜上的气溶胶对滤膜自吸收的影响可忽略。该方法的建立将为~(222)Rn/~(220)Rn子体的准确、快速、连续测量提供技术手段。
语种：
中文
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Propagation and power deposition of electron cyclotron waves in non-circular tokamak plasmas
作者：
李景春;龚学余;路兴强;黄千红
期刊：
原子能科学技术 ,2014年48(S1):679-684 ISSN：1000-6931
通讯作者：
Li, Jing-Chun
作者机构：
[李景春; 黄千红; 龚学余; 路兴强] School of Nuclear Science and Technology, University of South China, Hengyang , China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
会议名称：
北京核学会第十届(2014年)核应用技术学术交流会
会议时间：
2014-01-01
会议地点：
中国湖北武汉
会议论文集名称：
北京核学会第十届(2014年)核应用技术学术交流会论文集
关键词：
电子回旋波;非圆截面;波迹;功率沉积
摘要：
通过求解等离子体平衡方程、波迹方程和准线性Fokker-Planck方程,数值模拟了电子回旋(EC)波在非圆截面托卡马克等离子体中的传播轨迹和功率沉积。模拟结果表明:当EC波从顶部发射时,相比于圆截面的EC波波迹,非圆截面的波迹会向等离子体弱场侧偏移,增大等离子体中心电子密度,波迹也会偏向弱场侧,相应的波功率沉积有所降低;当EC波O模从中平面弱场侧发射时,随着平行折射率的增大,波迹弯曲幅度变大,增
语种：
中文
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Analysis of Isotopic Contributions to Doppler Coefficients of Inert Matrix Fuels
作者：
Xie, Jinsen* ;Yu, Tao
期刊：
International Conference on Nuclear Engineering, Proceedings, ICONE ,2014年4
通讯作者：
Xie, Jinsen
作者机构：
[Xie, Jinsen; Yu, Tao] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.;[Xie, Jinsen] China Inst Atom Energy Beijing, Dept Reactor Engn, Beijing 102413, Peoples R China.
通讯机构：
[Xie, Jinsen] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
会议名称：
22nd International Conference on Nuclear Engineering (ICONE22)
会议时间：
JUL 07-11, 2014
会议地点：
Prague, CZECH REPUBLIC
会议主办单位：
[Xie, Jinsen;Yu, Tao] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.^[Xie, Jinsen] China Inst Atom Energy Beijing, Dept Reactor Engn, Beijing 102413, Peoples R China.
会议论文集名称：
Proceedings of the 2014 22nd International Conference on Nuclear Engineering
摘要：
The Minor Actinides (MA) generated by nowadays PWRs fleet has significant impact on environment and biosphere. Inert Matrix Fuels (IMF) is a possible way to reduce the production and hazard of MA in recent. From neutronic aspect, using the MCNP code with temperature related continuous neutron data, the present paper analyses the isotopic contributions to the Doppler Coefficients of certain types IMF fuels. It is concluded that, the Doppler Coefficients of Al2O3+ZrO2+MgO and ZrO2 based IMF fuels are much smaller than those containing ThO2, since the low neutron absorptions and lacking of resonance broadening of Al, Zr, Mg and O elements. For the same Inert Matrix, Reactor Grade Plutonium (RG-Pu) IMF fuels have more negative Doppler Coefficients than Weapon Grade Plutonium (WG-Pu) IMF fuels, which induce by the more abundance of resonance isotopes ²⁴⁰Pu, ²⁴²Pu in RG-Pu. Since the different neutron absorption cross-section profiles, the Er2O3 burnable poison has negative contribution to the Doppler Coefficient, however ¹⁰B, a typical 1/v absorber, is on the contrary way. Copyright © 2014 by ASME Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal
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英文
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Electrochemical behaviors of Dy(III) and its co-reduction with Al(III) in molten LiCl-KCl salts
作者：
Su, Ling-Ling;Liu, Kui;Liu, Ya-Lan;Wang, Lu;Yuan, Li-Yong;...
期刊：
Electrochimica Acta ,2014年147:87-95 ISSN：0013-4686
通讯作者：
Zhao, Xiu-Liang
作者机构：
[Su, Ling-Ling; Zhao, Xiu-Liang] Univ South China, Sch Nucl Sci & Technol, Hengyang 421000, Peoples R China.;[Liu, Ya-Lan; Li, Zi-Jie; Su, Ling-Ling; Yuan, Li-Yong; Wang, Lu; Liu, Kui; Wang, Lin; Chai, Zhi-Fang; Shi, Wei-Qun] Chinese Acad Sci, Inst High Energy Phys, Key Lab Nucl Radiat & Nucl Energy Technol, Beijing 100049, Peoples R China.;[Chai, Zhi-Fang] Soochow Univ, Sch Radiol & Interdisciplinary Sci, Suzhou 215123, Peoples R China.
通讯机构：
[Zhao, Xiu-Liang] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421000, Peoples R China.
关键词：
molten chlorides;dysprosium;AlCl3;intermetallic compounds;co-reduction
摘要：
In this work, the electrochemical behaviors of Dy(III) and its co-reduction with Al(III) on an inert tungsten electrode was investigated in LiCl-KCl molten salts at the temperature of 773 K by using cyclic voltammetry (CV), chronopotentiometry (CP) and square wave voltammetry (SWV) techniques. The results showed that the reduction of Dy(III) ions in LiCl-KCl salts is a reversible diffusion controlled process through a one-step reaction: Dy(III) + 3e <-> Dy(0). The diffusion coefficient of Dy(III) ions was calculated by both the CV and CP methods. Furthermore, the co-reduction of Al(III) and Dy(III) ions on the inert tungsten electrode allows Dy(III) ions to be reduced at a more positive potential through forming Al-Dy alloys. The concentration ratio of Al(III) cations to Dy(III) cations has a large impact on the formation of Al-Dy alloys. In a Dy(III) ion rich system, three signals attributed to the formation of Al-Dy intermetallic compounds were observed in CV and SWV analyses, while only two signals corresponding to Al-Dy intermetallic compounds were observed in the Dy(III) ion poor system. Potentiostatic and galvanostatic electrolyses performed on an aluminum electrode identified the co-reduction by the formation of one (Al3Dy) and two Al-Dy alloys (Al3Dy, AlDy), respectively. Finally, the electrolysis products were characterized by the Scanning Electron Microscopy (SEM) coupled with Energy Dispersive Spectroscopy (EDS) and X-ray diffraction (XRD) analyses. (C) 2014 Elsevier Ltd. All rights reserved.
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英文
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Pathway of H+ in fragmentation of H-2 in 810 nm intense femtosecond laser fields
作者：
Guo, Wei;Lu, Xingqiang* ;Zhao, Dan;Wang, Xinlin
期刊：
PHYSICA SCRIPTA ,2014年89(2) ISSN：0031-8949
通讯作者：
Lu, Xingqiang
作者机构：
[Guo, Wei; Wang, Xinlin] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Lu, Xingqiang] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Zhao, Dan] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China.
通讯机构：
[Lu, Xingqiang] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
bond softening;above-threshold dissociation;Coulomb explosion;light-dressed states
摘要：
We experimentally measured the kinetic energy and angular distributions of fragment ion H<sup>+</sup> of H<inf>2</inf> as a function of 810 nm femtosecond laser intensity by using velocity map imaging technique. The reaction pathways of dissociation channels H<inf>2</inf><sup>+</sup> →H<sup>+</sup> + H and H<inf>2</inf><sup>2+</sup> →H<sup>+</sup> + H<sup>+</sup> are proposed. The analysis of the angular distribution indicates the net two-photon pathway via the 3ωcrossing dominates over the direct one-photon pathway in channel H<inf>2</inf><sup>+</sup> →H<sup>+</sup> + H. The ionization of H<inf>2</inf><sup>+</sup> to H<inf>2</inf><sup>2+</sup> may be initiated by bond softening and above-threshold dissociation. The relative yield of fragment peaks indicates that dissociation and ionization of H<inf>2</inf><sup>+</sup> are competitive. The lower laser intensities emphasize the dissociation probability of H<inf>2</inf><sup>+</sup>, and the higher laser intensities favor higher ionization stages. ©2014 The Royal Swedish Academy of Sciences.
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英文
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Bright tunable femtosecond x-ray emission from laser irradiated micro-droplets
作者：
Yu, Tong-Pu* ;Hu, Li-Xiang;Yin, Yan;Shao, Fu-Qiu;Zhuo, Hong-Bin;...
期刊：
Applied Physics Letters ,2014年105(11):114101 ISSN：0003-6951
通讯作者：
Yu, Tong-Pu
作者机构：
[Yu, Tong-Pu; Shao, Fu-Qiu; Yin, Yan; Yang, Xiao-Hu; Ma, Yan-Yun; Hu, Li-Xiang; Zhuo, Hong-Bin] Natl Univ Def Technol, Coll Sci, Changsha 410073, Hunan, Peoples R China.;[Luo, Wen] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Pukhov, Alexander] Univ Dusseldorf, Inst Theoret Phys 1, D-40225 Dusseldorf, Germany.
通讯机构：
[Yu, Tong-Pu] N;Natl Univ Def Technol, Coll Sci, Changsha 410073, Hunan, Peoples R China.
关键词：
brightness;drops;helium;plasma heating by laser;plasma light propagation;X-ray emission spectra
摘要：
It is demonstrated that bright femtosecond X-rays can be obtained by irradiating a moderate laser onto a helium micro-droplet. The laser ponderomotive force continuously sweeps electrons from the droplets and accelerates them forward. The electrons exposed in the outrunning laser field oscillate transversely and emit photons in the forward direction. The total flux of photons with energies above 1keV is as high as 109/shot which is about 10-fold enhancement compared with betatron oscillation under similar laser conditions. The maximum achieved peak brightness is up to 1021photons/s/mm2/mrad2/0.1%BW. By adjusting laser and droplet parameters, we can get tunable X-rays with required brightness and energy. © 2014 AIP Publishing LLC.
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英文
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Research on the lower detection efficiency of the RAD7 for Rn-220 than for Rn-222
作者：
Tan, Y.* ;Xiao, D.;Tang, Q.;Shan, J.;Zhou, Q.;...
期刊：
Journal of Instrumentation ,2014年9(6):T06001 ISSN：1748-0221
通讯作者：
Tan, Y.
作者机构：
[Tan, Y.] Hengyang Normal Univ, Dept Phys & Elect, Hengyang 421008, Peoples R China.;[Xiao, D.; Tang, Q.; Zhou, Q.; Shan, J.; Liu, X.] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Tan, Y.] Hengyang Normal Univ, Dept Phys & Elect, Henghua Rd 16, Hengyang 421008, Peoples R China.
通讯机构：
[Tan, Y.] H;Hengyang Normal Univ, Dept Phys & Elect, Henghua Rd 16, Hengyang 421008, Peoples R China.
关键词：
Data analysis;Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc)
摘要：
The measurement sensitivity of the RAD7 to the <sup>220</sup>Rn concentration in its internal cell is 30% less than the sensitivity to <sup>222</sup>Rn. This reduction in <sup>220</sup>Rn sensitivity relative to <sup>222</sup>Rn sensitivity has been attributed to the decay of <sup>216</sup>Po before it reaches the collection electrode. Analyzing the airflow patterns in the internal cell of RAD7, we propose that this may also be due to a ''short-circuit stream- highly concentrated <sup>220</sup>Rn injected into the internal cell and discharged from another port quickly. Since in the ''short-circuit stream'', the <sup>220</sup>Rn concentration of outflow is high, the <sup>220</sup>Rn concentration remaining in the internal cell must be low. Therefore, further improvement to the reliability and accuracy of <sup>220</sup>Rn measurements may be attained by the improvement of the measuring chamber geometric factor and the electric field. ©2014 IOP Publishing Ltd and Sissa Medialab srl.
语种：
英文
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梯形成形冲击响应函数推导、仿真和实验研究
作者：
胡创业;康玺;屈国普;李方立
期刊：
原子能科学技术 ,2014年48(2):341-346 ISSN：1000-6931
通讯作者：
Hu, C.-Y.
作者机构：
[胡创业; 康玺; 屈国普; 李方立] 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：
梯形滤波;卷积;冲击响应函数
摘要：
本文介绍了利用逆 z变换方法得到梯形成形冲击响应函数的推导过程，采用软件产生的单指数信号对其正确性进行了仿真验证。在单指数信号上加载不同标准差的高斯白噪声，经梯形成形仿真得到输出信号和输入白噪声标准差的比值约为0.447。通过搭建数字核信号获取平台，对实际输入核信号进行梯形成形，验证了推导过程与结果的正确性。
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中文
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