caesium137

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    NEWS Missing radioactive capsule: WA officials admit it was weeks before anyone realised it was lost

    Western Australian authorities are scrambling to find a missing radioactive capsule that is a fraction of the size of a 10c coin, conceding it was not found missing until more than two weeks after it left a Rio Tinto mine site. The 8mm by 6mm capsule is a 19-becquerel caesium 137 ceramic...
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