放射性核素

Measurement of gamma ray activities can be transformed to that of alpha ray and beta ray activities. When natural radionuclides are well distributed in materials, there is fixed interrelationship between alpha ray and beta ray activities in any part of a decorative material and alpha ray and beta ray surface activities.

同时，ICRP和IAEA都已明确我国《放射卫生防护基本标准》GB4792-1984对公众的剂量限值不适用于天然放射性，而我们的国家标准仍使用土壤的剂量转换因子和公众的年剂量限值来推导建筑材料的核素限量。

The coulomb excitation studies of the exotic nuclei around the double magic (superscript 28 subscript 28)Ni50 at RIBLL are proposed.

提出了利用兰州放射性束流线开展双幻核(上标 78 下标 28)Ni50附近核素的低位能级核结构研究的构想。

The method needs several parameters, such as average fission yields of fission products, correction for reaction, decay correction for radlioactive fission products in reactor, average fission energies of fissionable nuclides and so on.

它需要若干参数，如裂变产物的平均裂变产额，反应的修正量，放射性裂变产物的堆内衰变修正量，可裂变核素的平均裂变能量等。

Soil ; Natural Radioactivity ; Nuclide ; Content ; Investigation ; China

土壤；天然放射性；核素；含量；调查；中国

Radioisotope means the nuclide in a certain element with radioactive decay, which has the same ordinal number of atoms but different mass.

放射性同位素，是指某种发生放射性衰变的元素中具有相同原子序数但质量不同的核素。

This research is to provide a new ＂drug＂ that the paramagnetic radioactive isotopic nanometer-iron for treatment tumor, it have some characteristics comprising the paramagnetism and the radioactive activity, it can be located to the position of focus with three-dimensional rotating magnetic field.

本文提出一种新型的抗肿瘤药物——顺磁纳米铁核素，它具有超顺磁性、放射性活度和较好的磁导向功能的特点，在引导磁场的作用下可有效定位于靶区。

A method is described for the determination of ruthenium in solidified radioactive waste by flame atomic absorption spectrometry.

研究了火焰原子吸收法测定放射性废物固化体浸出液中模拟核素钌的测定方法。

The exposure dose from various nuclide through eachpathway to the population surrounding the nuclear power plant whichwas assumed to be in an accident was calculated by statistic calculationmethod using practical meteorological data.The relationship betweenradioactive release and exposure dose was obtaine,dwhich is independentof the accidential process and the meteorological condition.

本文借助于核电站假想事故条件下的放射性释放量，按不同的核素组，分组计算了其经各种照射途径对周围居民造成的剂量；并考虑了气象资料的统计数据，使得因天气条件两低估剂量的可能不超过5%；从而得到了与事故过程和天气条件无关的释放量和照射剂量间的关系。

Methods Through 99mTcO4- nuclein imaging of thyroid to 321 patients with subacute thyroiditis.Dealing with imaging to compare the radioactivity count of jaw gland and the radioactivity count of thyroid.

对321例亚急性甲状腺炎患者进行99mTcO4-甲状腺核素显像，通过影像处理计算颌下腺放射性计数/甲状腺放射性计数的比值。

After interaction nuclides was removed using TRPO solvent extraction, Determination of radioactivity of 90Sr or 90 Y in waste water using Cerenkov counting method is studied.

研究了经TRPO萃取去除放射性废水中的干扰核素后，用切伦科夫计数法测量90Sr或90Y的放射性浓度。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。