Phosphate rocks from a variety of countries were tested to determine the activity concentration of <sup>226</sup>Ra, <sup>232</sup>Th and <sup>40</sup>K (Bq kg<sup>-1</sup>).
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Phosphate rocks from a variety of countries were tested to determine the activity concentration of 226Ra, 232Th and 40K (Bq kg-1).
创建时间：
2023-08-03
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