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本文报告了1984年包头地区水体中天然放射性核素浓度调查结果,黄河包头段的浓度范围分别是:U,13.8~80.5Bq·m-3;Th,0.30~1.72Bq·m-3;226Ra,21.1~83.7Bq·m3;40K,99.6~114.1Bq·m-3。其它水体中的浓度范围分别是:U,15.0~119.4Bq·m-3;Th,0.19~1.11Bqm-3;226Ra,19.4~203.9Bqm-3;40K,24.9~469.3Bqm-3。