specific radioactivity

The radiochemical purity of radioiodinated 7 α-O-IA-DPN is more than 95%, and still greater than 90% kept for 24 h at room temperature. Radiochemical yields is 81%~ 90%, and specific radioactivity is 83.25 PBq/ mol.

研制结果为：碘标记的7αO IA DPN放化纯度大于95%，标记率为81%～90%，比活度高达83.25PBq/mol，室温下放置24h，放化纯度仍大于90%。

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

我国水泥产品天然放射性核素比活度的调查分析

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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.

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。

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Specific Radioactivity Produced by the Secondary Charged Particle Nuclear Reaction in the Primary Circuit Water of PWR

压水反应堆一回路水中二次带电粒子核反应产物的比活度

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The core of 80 fuel assemblies is more convenient in operation after 500 kW test loop installed, and in greatly raising the production of 60Co source with high specific radioactivity and the usage of fuel.

80盒元件堆芯更有利于500kW试验回路入堆后堆的运行，有利于大幅度提高高比度~（60）Co医疗源产量和元件利用率。

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

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

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