Broad beam transmission of gamma rays from Na-24 through iron, lead and uranium Fig 4.4 (1)

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Published: Sept 29, 2021

Broad beam transmission of gamma rays from Na-24 through iron, lead and uranium Fig 4.1 (1)

The definition of 'safe' is not strictly an engineering term; it's a societal term. Does it mean absolutely no loss of life? Does it mean absolutely no contamination with radiation? What exactly does 'safe' mean?

– Henry Petroski -