放射性比活度

调查分析了我国3个典型矿区锆英砂堆放表面γ剂量、放射性比活度、铀系和钍系平衡状况以及放射性元素含量；测定了我国海南万宁矿区锆英砂的组成及放射性。

In this survey , the surface γ dosage , radioactivity specific activity , uranium and thorium series equilibrium , the content of radioactive element of three kinds of typical Chinese zircon mineral has been analyzed , and the component and radioactivity of zircon in Wanning , Hainan Province tested .

~（60）Co靶件放射性比活度分布测量

Distribution measurement of ￣( 60 ) co target radioactive specific activity

产品放射性比活度为740TBq／mol，放射化学纯度＞95%。

The specific activity is 740 TBq / mol , and the radiochemical purity is over 95 % .

水稻植株地上部分各器官中~（32）P主要集中在穗部谷粒中，其放射性比活度和总活度均为最高。籽粒放射性比活度约为营养器官的1.5～5倍。

4.32P tracer experiment indicated that 32P was concentrated in seeds , both their radioactivity and specific activity are highest , about 1.5 ~ 5 times higher than that of vegetative organs in different cultivars .

125ILPT的放射性比活度为1.43MBq/μg，125I的总标记率为37.8%；

The specific radioactivity of 125I-LPT was 1.43 MBq / μ g , the total labeling rate of 125I was 37.8 % ;

结果显示：（1）所得标记物放射化学纯度>95%，放射性比活度为3.33×105Bq/μg（23-HBA）；

The results showed that the radiochemical purity was over 95 % and the specific radioactivity was 3.33 × 105 Bq / μ g ( 23-HBA );

目的评价FDG-PET测量肺部肿瘤放射性比活度的有关影响因素。

Objective To evaluate the factors affecting the measurement of lung tumor activity concentration ( AC ) with FDG-PET .

结果：125I-leptin的放射性比活度为143MBq/μg，125I的总标记率为378%，用以建立的RIA各项技术指标均满足临床要求。

Results The specific radioactivity of 125 I-leptin obtained was 1.43 MBq / μ g , the total labelling rate of 125 I was 37.8 % , and the technical specifications of leptin RIA could meet the requirement for clinical use .

自来水中总放射性比活度及其与降雨量相关的探讨

Study on Relationship between Radiation Specific Activity of Tap Water and Rainfall

本工作利用该法制备了高放射性比活度的氨基酸。

This method is used to prepare amino acid with high specific activity .

用改进的内充气法绝对标定氚水的放射性比活度

An Absolute Measurement of the Specific Activity of Tritiated Water with Improved Inner Gas-filled Proportional Counter

结果中子辐照改色前后黄玉的总α放射性比活度无显著差异；

Results The gross alpha did not show significant difference between colored topaz and nature color topaz .

哈密地区饮用水总α、总β放射性比活度评价

Specific activity of total α and β and its hygiene evaluation in potable water of Hami Prefecture

放射性比活度不同的饮水对小鼠生殖及细胞遗传功能的影响

Tom Clancys Splinter Cell Effects of drinking water with different background radiation levels on cytogenetic and reproduction function in mice

方法采集刚进入市场，或正在加工的中子辐照改色黄玉制成品或坯料，测定其总α、总β放射性比活度。

Methods The topaz products or semifinished products , colored by neutron radiation were sampled and their gross alpha and beta radioactivity were determined .

结果表明：①我国矿区锆英砂的放射性比活度比澳大利亚的锆英砂高了一个数量级，澳大利亚的锆英砂基本上是符合工业使用要求；

The results indicate that the radioactivity specific activity of Chinese zircon is higher one order of magnitude than that of Australian zircon which can meet the requirement of industrial application ;

所得产物经高效液相色谱纯化后，放射化学纯度大于98%，放射性比活度达738GBq/mmol，各项指标能满足医、药学相关研究的要求。

The radiochemical purity of the product purified by HPLC is greater than 98 % , and its specific activity is 738 GBq / mmol . The quality of the product could meet the demands of the relevant research on medicine or pharmacology .

土壤中放射性核素比活度检测能力验证结果分析

Evaluation on the analytical results of radionuclides in soils in the proficiency testing program

我国水泥产品天然放射性核素比活度的调查分析

The investigation and analysis on natural radioactivity nuclide specific activity of cement product in china

大亚湾海底泥中γ放射性核素比活度随深度的变化及底泥沉积速率的估算

Variations of Specific Activity of γ Radionuclides in Marine Sediments with Depth at GNPS Site and Evaluation of Sedimentation Velocity

γ能谱法在放射性核素比活度检验中测量不确定度的评定大亚湾海底泥中γ放射性核素比活度随深度的变化及底泥沉积速率的估算

Uncertainty Assessing in Measurement of Specific Activity from Radioactive Species by Gamma Spectrometry Variations of Specific Activity of γ Radionuclides in Marine Sediments with Depth at GNPS Site and Evaluation of Sedimentation Velocity

进行了各类建材表面a、b辐射水平和其天然放射性核素g比活度关系的研究和不同饰材表面b辐射水平的饱和厚度研究。

We have studied the relationship between gamma specific activities of natural radionuclides and alpha and beta ray level in building materials used in interior decoration , and the saturated thickness of beta ray from the surface of different materials .

本文报道近年来检测的安徽省非传统建筑材料中放射性核素的比活度。

This paper reports the radioactivity ratios about the untraditional building materials in Anhui Province , at recent years .

结果：不同产地、不同品种的进口花岗岩石材样品中天然放射性核素的比活度与普通建筑材料比有较大差别。

[ Results ] The specific activities of natural radionuclides in import granites of different producing area and different varieties have biggish differences with those in normal building materials .

粉煤灰使用地采样分析结果表明：农田施用硅肥不会造成生产的稻谷和玉米籽中的天然放射性核素的比活度超过国家标准；

The results of sampling analyze from the farmland used coal ash showed that : The specific activity of three nuclide in paddy grown in soil with of silicon fertilizer did not exceed security standard .

详细叙述了采用NaI低本底多道γ谱仪测量建筑材料天然放射性核素镭、钍、钾放射性比活度的原理与方法。

This paper describes the principles of detecting the radium , thorium , potassium radioactivity in architectural material using NaI ( Tl ) low background detector in detail .

分析结果表明，所采集的33个石材样品，有3个样品的天然放射性核素（226Ra，232Th，40K）含量异常偏高，其放射性比活度大于C类控制值；

And a division of them is made in the light of national standard . As indicated by analytical results , 3 out of 33 samples of building stone are very high in natural radioactive nuclide content , with a specific activity greater than control value of class C ;

本文从实测数据和有关文献资料出发，建立了放射性内外照射剂量模式，提出了有关掺渣建材产品中天然放射性核素比活度的控制标准和γ照射量率的检验规定。

In this paper upon a survey data and referents dose modeling of inside and outside exposure dose is built , the limit on specific activity of natural radionuclide and exposure rate for products contained industrial waste slags in building materials industry is determined .