放射性平衡

铀矿物放射性平衡及其应用研究

Radioactive equilibrium in uranium minerals and its application

该方法从理论上与实验技术方面排除了氡与其子体放射性平衡程度、结合态子体占总子体的比分以及带电子体所占的比分对测量结果的影响。

In this method , the influence on the measured values from the radioactive equilibrium of radon and its daughters , the ratio of combination daughters to the total daughters and the fraction of charged particles has been excluded in the theory and experimental methods .

随着密封时间的增加，氡及其子体与其母体核素之间相对平衡率增加，20d后达到放射性平衡。

The balance rate compared radon and its daughter nuclide with their mother nuclide is increased along with the remain-time extending , and reaches balance fully up to about 20 days .

本文对放射性平衡破坏的几种可能情况给出了新的平衡系数表达式。

This paper gives a new expression for U-Ra equilibrium coefficient to some possibilities of U-Ra disequilibrium .

用天然水溶液中234U与238U之间的放射性不平衡研究的方法，对鲁南两城地区30组水样地表水和地下水铀同位素组分进行了实测。

Determination of uranium isotope contents has been made by the method of radioactive disequilibrium between 234U and 238U for the surface and underground water from Liangcheng region of southern Shandong Province , and the results of 30 water samples analyses are presented .

放射性核素平衡法心室造影对冠心病室壁瘤的诊断价值

The clinical value of radionuclide equilibrium ventriculography in detecting left ventricular aneurysm

某铀矿床中水－岩反应的时间范围和强度，可通过对铀天然衰变系放射性不平衡的研究得到半定量化。

The time scale and intensity of the water rock interaction in a uranium deposit can be semi quantitatively assessed using uranium series disequilibrium .

在稀土矿物在加工利用中，原矿、精矿和选矿尾矿中，放射性钍系基本处于放射性平衡状态，但在稀土产品、富集物、富铈渣和冶炼废渣中，钍系处于非放射性状态。

In the processing and utilization of rare-earth minerals , radioactive thorium series is in radioactive equilibrium basic state in raw ore , concentrate and mineral processing tailings , but in the rare earth products , enrichment , Ce-rich slag and smelting waste , the thorium series is non-radioactive state .

此方法有可能推广到建材等放射性检测，只要能确认样品未粉碎前226Ra、232Th与各自子体处于放射性平衡。

This method may be recommended to be used in monitoring radioactivity of constructive materials only necessary to make sure the equilibrium of ~ ( 226 ) Ra and ~ ( 232 ) Th with its daughter nuclides has reached before the crushing materials .