• Question: what is the radiation level of Erbium

    Asked by steve3380 to Dave, Matt on 22 Nov 2013.
    • Photo: Matthew Tomlinson

      Matthew Tomlinson answered on 22 Nov 2013:

      Erbium 169 has the longest half-life at 9.4 days, it emits beta particles which can be stopped by a sheet of aluminum so it’s not that dangerous.

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