CONCLUSION OF INTERNATIONAL SYMPOSIUM ON NUCLEAR ENERGY AND THE ENVIRONMENT AT BEIJIN ON 14～18 OCT.1996

ＣＯＮＣＬＵＳＩＯＮＯＦＩＮＴＥＲＮＡＴＩＯＮＡＬＳＹＭＰＯＳＩＵＭＯＮＮＵＣＬＥＡＲＥＮＥＲＧＹＡＮＤＴＨＥＥＮＶＩＲＯＮＭＥＮＴＡＴＢＥＩＪＩＮＯＮ１４～１８ＯＣＴ．１９９６Ｂ．Ｇ．Ｂｅｎｎｅｔ（ＵＮＳＣＥＡＲ）Ｗｅｈａｖｅｃｏｍｅｔｏｔｈｅｅｎ...     

BODY SURFACE EXPOSURE DISTRIBUTION OF EXAMINEES RECEIVED UPPER G．I．T．X－RAY EXAMINATION

ＢＯＤＹ　ＳＵＲＦＡＣＥ　ＥＸＰＯＳＵＲＥ　ＤＩＳＴＲＩＢＵＴＩＯＮ　ＯＦ　ＥＸＡＭＩＮＥＥＳ　ＲＥＣＥＩＶＥＤ　ＵＰＰＥＲ　Ｇ．Ｉ．Ｔ．Ｘ－ＲＡＹ　ＥＸＡＭＩＮＡＴＩＯＮＦｅｎｇＤｉｎｇｈｕａ（冯定华）ａｎｄＣｈｅｎｇＱｉｊｕｎ（程祺钧）（Ｆａｃｕ...     

RADIOIMMUNOTOXICOLOGICAL EFFECT OF ENRICHED URANIUM ON CENTRAL AND PERIPHERAL IMMUNE CELLS AND THE PROTECTIVE ACTION OF IL－1 AND IL－2

ＲＡＤＩＯＩＭＭＵＮＯＴＯＸＩＣＯＬＯＧＩＣＡＬＥＦＦＥＣＴＯＦＥＮＲＩＣＨＥＤＵＲＡＮＩＵＭＯＮＣＥＮＴＲＡＬＡＮＤＰＥＲＩＰＨＥＲＡＬＩＭＭＵＮＥＣＥＬＬＳＡＮＤＴＨＥＰＲＯＴＥＣＴＩＶＥＡＣＴＩＯＮＯＦＩＬ－１ＡＮＤＩＬ－２￥ＺｈｕＳｈｏｕｐｅ...     

DETERMINATION OF SUPERFICAL ABSORBED DOSE FROMEXTERNAL EXPOSURE OF WEAKLY PENETRATING RADEATIONS

ＤＥＴＥＲＭＩＮＡＴＩＯＮＯＦＳＵＰＥＲＦＩＣＡＬＡＢＳＯＲＢＥＤＤＯＳＥＦＲＯＭＥＸＴＥＲＮＡＬＥＸＰＯＳＵＲＥＯＦＷＥＡＫＬＹＰＥＮＥＴＲＡＴＩＮＧＲＡＤＥＡＴＩＯＮＳＣｈｅｎＬｉｓｈｕ（陈丽姝）（ＣｈｉｎａＩｎｓｔｉｔｕｔｅｏｆＡｔｏｍｉｃＥｎ...     

EFFECT OF HEATING RATE ON NONLINEARITY OF DOSE RESPONSE IN TL BY KINETICS MODEL

ＥＦＦＥＣＴ　ＯＦ　ＨＥＡＴＩＮＧ　ＲＡＴＥ　ＯＮ　ＮＯＮＬＩＮＥＡＲＩＴＹ　ＯＦ　ＤＯＳＥ　ＲＥＳＰＯＮＳＥ　ＩＮ　ＴＬ　ＢＹ　ＫＩＮＥＴＩＣＳ　ＭＯＤＥＬＬｉｕＸｉａｏｗｅｉ（刘小伟）ａｎｄＫ．Ｎ．Ｙｕ（余君岳）（ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓ...     

EFFECT OF THE RATIO Th/U ON TL DATING ACCURACY

ＥＦＦＥＣＴＯＦＴＨＥＲＡＴＩＯＴｈ／ＵＯＮＴＬＤＡＴＩＮＧＡＣＣＵＲＡＣＹ￥Ｐ．Ｌ．Ｌｅｕｎｇ（梁宝鎏）；ＭｉｃｈａｅｌＪ．Ｓｔｏｋｅｓ（ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃｓａｎｄＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅ，ＣｉｔｙＰｏｌｙｔｅｃｈｎｉｃｏ...     

STUDY ON OCCURENCE FORM OF PLATINUM IN XINJIE Cu－Pt DEPOSIT BY NAA AND SCANNING PROTON MICROPROBE

ＳＴＵＤＹＯＮＯＣＣＵＲＥＮＣＥＦＯＲＭＯＦＰＬＡＴＩＮＵＭＩＮＸＩＮＪＩＥＣｕ－ＰｔＤＥＰＯＳＩＴＢＹＮＡＡＡＮＤＳＣＡＮＮＩＮＧＰＲＯＴＯＮＭＩＣＲＯＰＲＯＢＥＬｉＸｉａｏｌｉｎ，ＺｈｕＪｉｅｑｉｎｇ，ＧｕＹｉｎｇｍｅｉ，ｗｕＸｉａｎＫａｎｇ（Ｓ...     

STIMULATING EFFECT OF LOW DOSE ~(147)Pm ON DNA REPAIR IN SPERMIOGENIC STAGES

ＳＴＩＭＵＬＡＴＩＮＧＥＦＦＥＣＴＯＦＬＯＷＤＯＳＥ~（１４７）ＰｍＯＮＤＮＡＲＥＰＡＩＲＩＮＳＰＥＲＭＩＯＧＥＮＩＣＳＴＡＧＥＳＳＴＩＭＵＬＡＴＩＮＧＥＦＦＥＣＴＯＦＬＯＷＤＯＳＥ~（１４７）ＰｍＯＮＤＮＡＲＥＰＡＩＲＩＮＳＰＥＲＭＩＯＧＥＮＩＣＳＴ...     

MEASUREMENT OF NEUTRON SPECTRA FROM THICK Be TARGET BOMBARDED WITH DEUTERONS

ＭＥＡＳＵＲＥＭＥＮＴＯＦＮＥＵＴＲＯＮＳＰＥＣＴＲＡＦＲＯＭＴＨＩＣＫＢｅＴＡＲＧＥＴＢＯＭＢＡＲＤＥＤＷＩＴＨＤＥＵＴＥＲＯＮＳＷａｎｇＸｉａｏｚｈｏｎｇ（王效忠）；ＢａｉＸｉｘｉａｎｇ（白希祥）；ＬｉＡｎｌｉ（李安利）；ＬｉｕＷｅｉｐｉｎｇ（柳...     

STUDY ON MODERATORS OF SMALL－SIZE NEUTRON RADIOGRAPHY INSTALLATIONS WITH NEUTRON TUBE AS SOURCE

ＳＴＵＤＹ　ＯＮ　ＭＯＤＥＲＡＴＯＲＳ　ＯＦ　ＳＭＡＬＬ－ＳＩＺＥ　ＮＥＵＴＲＯＮ　ＲＡＤＩＯＧＲＡＰＨＹ　ＩＮＳＴＡＬＬＡＴＩＯＮＳ　ＷＩＴＨ　ＮＥＵＴＲＯＮ　ＴＵＢＥ　ＡＳ　ＳＯＵＲＣＥＭａＷｅｉｃｈａｏ（马维超）；ＺｈｏｕＭｉｎｇｄａ（周明达）...     

NaI(Tl)γ谱仪测量数据的计算机处理方法

本文介绍了使用NaI(T1)γ谱线在铅室内分析环境土壤样品和就地γ辐射谱测量的刻度方法,以及专用微机解谱程序的功能和使用方法。     

基于低能特征峰的自然伽玛能谱测井方法探讨及实践

提出了一种新的自然伽玛能谱测井的方法,该方法仅探测低能伽玛射线,选定~(214)Bi的609.3keV和~(208)Tl的583.2keV特征峰分别作为铀道和钍道的计数窗口.采用HPGe伽玛谱仪对测井模型进行实验测量,获得的铀道、钍道测井曲线效果很好,验证了该方法的可行性,表明基于HPGe探头的铀矿伽玛测井研究前景诱人.     

自动绝对测量~(125)Ⅰ活度

用配备通用自动计数与数据处理装置的井型NaI(Tl)探测器对~(125)I活度进行了绝对测量。用DD8000多道分析器和3路计数器的测量验证了它的可靠性。研究了峰交叉对测量结果的影响,并给出各项不确定度分量的计算公式。     

An inversion decomposition method for better energy resolution of NaI(Tl) scintillation detectors based on a Gaussian response matrix

NaI(T1) scintillation detectors have been widely applied for gamma-ray spectrum measurements owing to advantages such as high detection efficiency and low price.However,the mitigation of the limited energy resolution of these detectors,which detracts from an accurate analysis of the instrument spectra obtained,remains a crucial need.Based on the physical properties and spectrum formation processes of NaI(T1) scintillation detectors,the detector response to gamma photons with different energies is represented by photopeaks that are approximately Gaussian in shape with unique full-width-at-half-maximum(FWHM) values.The FWHM is established as a detector parameter based on resolution calibrations and is used in the construction of a general Gaussian response matrix,which is employed for the inverse decomposition of gamma spectra obtained from the detector.The Gold and Boosted Gold iterative algorithms are employed to accelerate the decomposition of the measured spectrum.Tests of the inverse decomposition method on multiple simulated overlapping peaks and on experimentally obtained U and Th radionuclide series spectra verify the practicability of the method,particularly in the low-energy region of the spectrum,providing for the accurate qualitative and quantitative analysis of radionuclides.     

HD－8004型NaI（T1）闪烁谱仪测量自然γ能谱的精度

本文简述了自然γ能谱测量与分析精度的重要性，采用ＮａＩ（Ｔ１）闪烁谱仪进行自然γ能谱测量及分析的基本原理与方法。介绍了低水平自然γ能谱测量时为提高精度拟采取的措施；简介了ＨＤ－８００４型ＮａＩ（Ｔ１）闪烁谱仪的结构与指标；提供了为油田部分岩样进行自然γ能谱测量与分析的应用效果等。这对自然γ能谱测量工作的广泛开展及其精度的研究的深入探讨是十分有益的。     

Current Methods for Laboratory Analysis of Environmental Levels of Radioactivity

This paper reviews the current methods for laboratory analysis of environmental levels of radioactivity and discusses the background, Compton scatter, and efficiency parameters that are associated with the various spectrometer systems. The methods which are discussed are: 1) total absorption gamma-ray spectrometry, 2) multidimensional gamma-ray spectrometry, and 3) multidimensional gamma-ray spectrometry with dual beta coincidence (all systems use NaI(Tl) detectors). Dual Ge(Li) anticoincidence shielded systems as well as NaI(Tl) and Ge(Li) coincidence gamma-ray spectrometers are discussed. The analysis of X-ray and alpha emitters is pursued for both laboratory and field detector systems. The special adaptation of some gamma-ray, X-ray and alpha spectroscopy systems to field utilization including underwater analysis is presented.     

氧化钚属性测量技术研究

利用高分辨高纯锗γ谱仪,在铅屏蔽室内,对100 g回收氧化钚粉末样品和8 g纯氧化钚粉末样品分别进行了长时间测量,在自然环境,对200 g回收氧化钚粉末样品进行了现场探测.在三个样品的能谱中均观察到871 keV特征γ射线,除此之外,没有观察到其它与氧的存在相关的特征射线.同过去所测的金属钚谱相比较,在金属钚谱中未曾发现871 keV特征γ射线.因此,就核查区分封闭容器罐中的钚材料是金属钚还是化合钚而言,可以用871 keV来旁证"金属钚的不存在".对200 g氧化钚样品的现场探测表明,871 keV能峰是明显存在的,而且自编的丰度和年龄分析软件能从10 min测量能谱中识别出871 keV能峰.如果将属性测量系统的分析软件和控制部分进行适当改进,该系统就具备通过监测871 keV能峰确定氧化钚属性的能力.     

Neutronics diagnostics for European ITER TBMs: Activation foil spectrometer for short measurement cycles

An important aim of neutronics Test Blanket Module (TBM) experiments in ITER will be to check the prediction accuracy of nuclear responses in an environment closer to a future fusion power reactor than so far provided by existing facilities. The development of measurement methods suitable for the harsh environment in an ITER TBM has been addressed in several recent R&D programs supported by Euratom. Within this framework, KIT is developing an activation foil spectrometer for the measurement of local neutron flux densities in the TBM. We intend to establish a measurement method which allows to record the induced activities in small packages of activation foils simultaneously and to calculate the corresponding spectral neutron flux densities with moderate time resolution of tens of seconds immediately after extraction from the TBM. In the present work we propose a candidate set of activation foil materials which cover the neutron energy range from thermal to 14 MeV. In order to assess their basic suitability for such measurements, we have computed induced gamma-ray activities in the foils using a calculated neutron spectrum in a representative position in the European HCPB TBM assuming a short irradiation time of 30 s. In a further step we have investigated pulse height spectra which would be obtained in a typical gamma-ray measurement arrangement in a HPGe detector and concluded that the proposed set of activation foils should be basically suitable for such a measurement system but require improvement of relevant cross sections uncertainties.     

NASVD方法在CE1-GRS谱线分析中的应用研究

直接从谱形特征上对嫦娥一号伽玛射线谱仪(CE1-GRS)的3级谱线数据进行分析,难以确定月表元素的种类。提出采用噪声调整的奇异值分解(NASVD)方法对CE1-GRS谱线进行定性分析。分析结果表明,该方法能够识别出的月表可能元素包括U、Th、K、Fe、Ti、Si、O、Al、Mg和Ca等10种元素,也能够通过各观测谱线对应于第一主成分的幅度绝对值大小反映对应月表区域的总放射性活度强弱。     

一个NaIγ谱定量分析程序—NASP（NaI）

本文介绍一个NaI γ射线谱定量分析程序,该程序使用库导向曲线拟合方法和计算机交互图形显示工具,克服了分析NaI γ谱时所遇到的困难,并在环境样品分析等应用中得到了满意的结果。