1.
The time required for half the nuclei in a sample of a specific isotopic species to undergo radioactive decay.
半衰期放射性样品的原子核经历一半放射性衰变所需要的时间
2.
A new method of measuring indoor radioactivity of radon is presented by using the indoor fast-moving ball as the sample of a radioactive substance.
给出了一种用室内快速运动的球体作为放射性样品测量室内氡射气辐射活度的新方法。
3.
Radioactive Detection of Environmental Samples in Lop Nur Region
罗布泊地区环境样品中的放射性检测
4.
Radionuclides analysis of air aerosol samples(Ⅰ) The gamma-ray spectrometric method
大气气溶胶样品中放射性核素分析(Ⅰ)气溶胶样品中放射性γ能谱分析方法
5.
The activity of a sample is defined to be the number of disintegrations per unit time.
样品的放射性定义为每单位时间的蜕变数目。
6.
Discussion on Fleet Test Method for Radioactivity Ore Sample
关于放射性矿石样品快速检测方法的讨论
7.
A small shallow metal container in which a radioactive substance is deposited for measurement of its activity.
样品皿用于存放放射性物质以测量其活性的小而浅的金属容器
8.
Exempt Items of Radioactive Substances
放射性物质的豁免物品
9.
a radiomimetic chemical.
产生放射性的化学药品
10.
quality control of radioactive products
放射性产品的质量控制
11.
Result Analysis on Determination of Radionuclide Content in Solid Samples by NaI(Tl)Scintillation Spectrometer
NaI(Tl)闪烁谱仪测量固体样品中放射性核素含量的结果分析
12.
General principles for sampling airborne radioactive materials??
放射性气溶胶取样的一般原则
13.
evaporated sample liquid activity meter
蒸发液体试样放射性测量计
14.
activity meter with automatic changer
自动换样的放射性测量仪
15.
Research and development of a new radioactive aerosol sampling and filter membrane
新型放射性气溶胶取样过滤膜的研制
16.
Radiochemical analysis of caesium-137 in ash of biological samples
GB/T11221-1989生物样品灰中铯-137的放射化学分析方法
17.
These artificial radio-elements behave in all respects like the natural radio-elements.
这些人造的放射性元素在各方面的表现和天然的放射性元素一样。
18.
Researches on Method of Radioactivity Determination in Aquatic Products;
水产品中放射性活度的检测方法研究