Ponikarova T M, Bekiasheva T A
Gig Sanit. 1989 Apr(4):22-5.
The values of regional mean concentrations of natural radionuclides in the teeth samples of the RSFSR residents vary within 130-203 mBk/kg for 238U, 174-490 mBk/kg for 226Ra, 1.8-3.4 Bk/kg for 210Pb, 26-56 mBk/kg for 232Th, 50-150 mBk/kg for 228Th. The mean values of 238U in osseous tissue and teeth are similar and equal 120 +/- 35 and 112 +/- 38 mBk/kg, respectively. Radioactive balance between 228Th and 232Th in osseous tissue is absent. The ratio of the concentration of 228Th/232Th is on the average equal to 2.4 +/- 0.9 and of 220Th/832Th doesn't exceed 1.3. The distribution of regional mean concentrations of radionuclides of uranium and thorium series complies with standard distribution. An annual effective equivalent internal dose obtained because of natural alpha-emitters has been calculated for the population of the RSFSR.
俄罗斯苏维埃联邦社会主义共和国居民牙齿样本中天然放射性核素的区域平均浓度值，对于²³⁸U在130 - 203毫贝克勒尔/千克之间变化，对于²²⁶Ra在174 - 490毫贝克勒尔/千克之间，对于²¹⁰Pb在1.8 - 3.4贝克勒尔/千克之间，对于²³²Th在26 - 56毫贝克勒尔/千克之间，对于²²⁸Th在50 - 150毫贝克勒尔/千克之间。骨组织和牙齿中²³⁸U的平均值相似，分别为120±35和112±38毫贝克勒尔/千克。骨组织中²²⁸Th和²³²Th之间不存在放射性平衡。²²⁸Th/²³²Th浓度比平均等于2.4±0.9，²²⁰Th/²³²Th不超过1.3。铀系和钍系放射性核素的区域平均浓度分布符合标准分布。已为俄罗斯苏维埃联邦社会主义共和国居民计算了因天然α发射体而获得的年有效当量内照射剂量。
