[核] 中子活化分析
An automatic data processing system for reactor neutron activation analysis is designed for personal computer in DOS environment.
介紹了一個在微機上建立的反應堆中子活化分析數據自動處理系統。
Neutron Activation Analysis(NAA) is a valid nuclear analytical technique, whichoccupy an important position in the chemical element analysis.
中子活化分析是一種有效的核分析技術，在微量和痕量元素分析中占有重要地位。
The influence of adsorption time and temperature on the distribution ratio of cesium between RVC and liquid sodium is investigated in the static condition by using neutron activation analysis(NAA).
以網狀玻璃體碳（RVC）為吸附劑，用中子活化分析法研究了在靜态條件下，吸附溫度和吸附時間對铯在RVC和液态鈉中分配的影響。
Meanwhile the variation and status of distribution of many elements content in the different parts of vitreous shoot were determined by neutron activation analysis technique.
利用中子活化分析技術測定了玻璃苗不同部位中的多種元素含量和分布狀況及變化。
The instrumental neutron activation analysis at MNSR reactor was used for determination of 10 rare earth elements in geological samples.
本文介紹了在微型中子源堆上用儀器中子活化分析測定地質樣品中10個稀土元素的方法。
The application of neutron activation analysis in research of environmental sciences which possesses such characteristics as automatically , quickly and being able to measure more elements.
簡述了中子活化分析在環境科學研究中的應用，具有自動、快速、測量元素多等特點。
An INAA (Instrumental Neutron Activation Analysis) method was used to determine the abundance of rare-earth elements in 58 Late Palaeozoic coals and related rocks in North China.
采用儀器中子活化分析法（INAA）測定了華北晚古生代石炭紀-二疊紀58個煤及煤層夾矸和頂底闆樣品的稀土元素含量。
The contents of the major and trace elements in the Yanzhuang meteorites have been determined by instrumental neutron activation analysis(INAA).
用中子活化分析測定了新隕岩莊隕石的主量和微量元素含量。
The distribution characteristics of organo-halogens in apple and their sources were stu***d by neutron activation analysis combined with statistical analysis.
采用中子活化分析方法，研究了蘋果中有機鹵素污染物的分布特征。
The nickel sulfide fire assay preconcentration followed by neutron activation analysis was used to determine the platinum group elements(PGE) in rocks.
研究了鎳锍試金預富集中子活化分析測定岩石樣品中的鉑族元素。
NAA (neutron activation analysis) and AFS (atomic fluorescence analysis), for determining mercury in human hair on the basis of the authors' experience.
中子活化分析法測汞具有靈敏、準确、無試劑空白、能作多元素同時分析的優點。
The results lay the foundation for the study of on-line neutron activation analysis system.
計算結果表明，中子活化線上分析系統的最優化慢化材料為聚乙烯。
Interactions between lanthanum and wheat roots are stu***d by a sequential extractive process combined with instrumental neutron activation analysis as well as transmission electronic microscopy.
用中子活化分析結合分級提取及透射電鏡觀察，研究了稀土元素镧在小麥根中的分布和存在形态。
More than 20 types of metallic elements were discovered in XC gas field, Sichuan Basin, when it was stu***d by neutron activation analysis (NAA).
利用中子活化法對四川盆地XC氣田的天然氣進行分析，發現其中含有20多種金屬元素。
The instrumental neutron activation analysis was used to determine Cr content in chromium-rich yeast cells.
利用中子活化分析法對富鉻酵母中的鉻進行了測定。
The instrumental neutron activation analysis (INAA) has been performed on 27pairs of scalp hair samples for mothers and their new-born babies living in Haidian District, Beijing.
以人發作“監示器”，用中子活化法分析了27對北京海澱區産婦、嬰兒發樣中的汞含量，以研究汞在孕婦體内的轉移及在新生兒體内的蓄積。
Neutron activation analysis for uranium in soild may delineate structures.
分析測定土壤中的鈾以圈定構造。
Objective To study a method for determination of trace arsenic in cosmetics by miniature nuclear reactor epithermal neutron activation analysis.
目的探讨用微型核反應堆超熱中子活化方法分析化妝品中的微量砷。
In this research, we picked out samples under microscope and lap minerals, and then got the data by neutron activation analysis.
本次研究對樣品進行顯微鏡下的人工挑選、研磨礦物，再進行中子活化分析來得到數據。
The paper describes the results of the research of the feasibility of pureinstrument multielement reactor neutron activation analysis with short timeirradiation.
該文叙述了在原子能科學研究院重水反應堆上進行的堆中子短照純儀器多元素活化分析的實用性和可行性的研究結果。
Twenty trace elements were found by neutron activation analysis in the nuclear reactor in 13 specimens of Jan wares collected from different localities and different historical periods.
本文利用反應堆中子活化分析法對不同産地、不同時代生産的鈞瓷殘片進行了分析，獲得了十三塊标本中的二十種元素的含量值。
Also epithermal neutron activation analysis and cyclic activation analysis had be developed on Shenzhen MNSR.
建立超熱活化分析和循環活化分析方法，制備了醫用放射性玻璃微球。
CFNAA Cf-252 neutron activation analysis?
锎252中子活化分析…
The design of automatic radiation and measuring system for neutron activation analysis and its realization are introduced in this paper.
介紹反應堆中子活化自動輻照檢測系統的設計和實現過程。
Nickel oxide is purified and pulverization property of nickel button is stu***d. The method of determination of platinum group elements (PGE) based on neutron activation analysis (NAA) is established.
對氧化鎳進行提純，對試金扣的粉化性能進行了研究，用中子活化分析測定了地質樣品中的鉑族元素，全流程回收率在94％以上。
In the paragraph of the method of using artificial tracer, there is the explanation about the tracer technology of neutron activation analysis and the method of Lanthanide-DTPA tracer.
在人工示蹤法中叙述了中子活化示蹤沙技術和稀土元素-DTPA螯合物示蹤法。
The contents of 8 rare earth elements(REEs)in chloroplasts of Brassia napus were determined by instrumental neutron activation analysis.
用中子活化分析測定了油菜葉綠體中的稀土元素含量。
中子活化分析（Neutron Activation Analysis, NAA）是一種利用中子與物質發生核反應，通過檢測生成的放射性同位素特征來定量分析樣品中元素種類和含量的核分析技術。其原理是将樣品置于中子源（如核反應堆）中輻照，中子與靶原子核發生俘獲反應，生成不穩定的放射性同位素；隨後通過測量這些同位素衰變時釋放的特征伽馬射線能量和強度，結合已知的核反應截面數據，即可精确計算出元素的濃度。
該方法具有以下核心特點：
實際應用中需注意其局限性，例如依賴核反應堆等大型設施，且對輕元素（如碳、氧）的檢測靈敏度較低。當前該技術已與X射線熒光光譜（XRF）等互補方法結合，形成多維元素分析體系。
參考文獻
中子活化分析（Neutron Activation Analysis, NAA）是一種通過中子輻照樣品，利用核反應生成放射性核素，并通過分析其特征輻射進行元素定性和定量分析的方法。以下是其詳細解釋：
中子活化分析基于核反應原理，用中子轟擊樣品中的穩定同位素，使其轉變為放射性同位素（即“活化”）。隨後通過測量這些放射性同位素衰變時釋放的γ射線能量和強度，确定元素的種類和含量。其核心公式為：
$$
A = N cdot sigma cdot phi cdot (1 - e^{-lambda t})
$$
其中，( A )為放射性活度，( N )為靶核數目，( sigma )為核反應截面，( phi )為中子注量率，( lambda )為衰變常數，( t )為輻照時間。
通過結合核物理與化學分析技術，中子活化分析在痕量元素檢測領域具有不可替代的優勢。如需更詳細案例或操作流程，可參考來源網頁。
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