查询词典 radioactive isotope

A radioactive isotope of cesium used in radiation therapy.

铯的一种放射性同位素，用于放射疗法。

The decay of ~(99m)Tc source was used to verify experimentally that in the measurement of the number of atoms of a radioactive isotope in a sample at time t_0, the error introduced through the inaccuracy of its decay constant can be reduced to a much smaller value by the careful selection of the time of measurement or measurements of its radioactivity at around one life time (1/λ) after t_0 and doing the calculation.

本文用~(99m)Tc源的衰变实验证明了：在测量一个样品中在t_0时的一种放射性同位素的原子数时只需精心选择一次或多次测量其放射性的时刻在t_0后约该同位素的一个寿期(1/λ)，并进行计算，则由它的衰变常数或其半衰期(T1/2)的不准确性而引进的误差可以被降低到较小值。

This paper introduced the principle of using the radioactive isotope gamma rays to measure the aircraft fuel density.

测量结果表明，该方法能够达到较高的密度测量精度，具有广阔的应用前景。

3 The poisonous, harmful or radioactive workplace is prone to contingent occupational injuries or the transportation/storage of radioactive isotope fails to meet the provision of Article 23 hereinabove

可能发生急性职业损伤的有毒、有害工作场所、放射工作场所或者放射性同位素的运输、贮存不符合本法第二十三条规定的

Or the combination of the dye and the radioactive isotope technique.

或是染色物和放射性同位素的化合物的技术。

A radioactive isotope that is used in a compound in order to trace the mechanism of a chemical reaction.

使化合物中化学反应的机制显踪的放射性同位素。

The result shows that radioactive isotope tracer petroleum logging technique possesses favorable application prospect both in theory and in production.

实验结果表明，放射性同位素示踪能谱测井技术在理论上和生产中具有良好的应用前景。

KCJJY The application of radioactive isotope in biomedical research is an important part of the peaceful use of atomic energy.

KCJJ 放射性同位素在生物医学研究中的应用是国家和平利用原子能的重要标志之一，有不少用途是其它技术无法取代的。

The importation of the radioactive isotope, radiation equipment and other radioactive materials should come up to applicable state regulations.

进口放射性同位素、射线装置和含有放射性物质的物品的，按照国家有关规定办理。

Distinguish by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions.

用放射性同位素或不寻常质量的同位素使元素或原子显示运动踪迹。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。