Muth H, Glöbel B
Health Phys. 1983;44 Suppl 1:113-21. doi: 10.1097/00004032-198306001-00009.
The concentration of 226Ra in more than 1000 human bone samples, still born infants, fetuses, blood, mixed diet, drinking water and mineral water has been measured. An age dependence of 226Ra concentration in human bone could be demonstrated. Up to an age of 20 yr two maxima of 226Ra concentration in bone occur, coinciding with the increased velocity of skeleton growth. Normally, the main source for uptake of radium by man is food. In Germany the transfer factor from diet to bone is about 0.098. Compared with data from literature for other countries, mainly the U.S.A., the German value is higher by a factor of about 1.5. This difference may be due to the lower calcium uptake in Germany which leads to higher resorption of radium. Two methods for measuring natural radium concentrations is biological material and water samples are briefly described: a gamma-gamma-coincidence method for indirect measurement of 226Ra via the short lived 214Bi(RaC) and an alpha-spectrometric method for direct measurement of the alpha-emission of 226Ra.
已对1000多份人体骨骼样本、死产婴儿、胎儿、血液、混合饮食、饮用水和矿泉水中的镭-226浓度进行了测量。已证实人体骨骼中镭-226浓度与年龄有关。在20岁之前，骨骼中镭-226浓度出现两个峰值，这与骨骼生长速度加快相吻合。通常，人类摄取镭的主要来源是食物。在德国，从饮食到骨骼的转移系数约为0.098。与其他国家（主要是美国）文献中的数据相比，德国的数值高出约1.5倍。这种差异可能是由于德国钙摄入量较低，导致镭的再吸收较高。简要介绍了两种测量生物材料和水样中天然镭浓度的方法：一种是通过短寿命的铋-214（镭C）间接测量镭-226的γ-γ符合法，另一种是直接测量镭-226α发射的α能谱法。
