Bekiasheva T A, Grashchenko S M, Ponikarova T M, Popov D K, Shishkunova L V
Med Radiol (Mosk). 1984 Sep;29(9):22-5.
The concentrations of Th isotopes were determined in the teeth of persons belonging to 3 age groups (under 7,8-16, over 16) from 10 areas of RSFSR. Differences in the content of 228Th and 232Th in the teeth of persons of various ages living in different areas of the RSFSR are statistically insignificant. There is no balance between them in all the samples. The ratio of their concentrations is on an average 2.4 +/- 0.9. The Th isotope summary irradiation dose absorbed by the osseous tissue is 9.6 X 10(-6) Gy/year.
测定了来自俄罗斯联邦苏维埃社会主义共和国10个地区3个年龄组（7岁以下、8 - 16岁、16岁以上）人群牙齿中钍同位素的浓度。生活在俄罗斯联邦苏维埃社会主义共和国不同地区的不同年龄人群牙齿中228钍和232钍的含量差异无统计学意义。所有样本中它们之间不存在平衡。其浓度比平均为2.4±0.9。骨组织吸收的钍同位素总照射剂量为9.6×10⁻⁶戈瑞/年。
