what is Half-Life of electron beam accelerator
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The main activities are due to 52Mn(m), 56Mn, 54Mn, 52Fe and 53Fe. The estimated combined exposure rate at 1 meter from the beam stop is about 0.48 mR/h, contributed mainly by 52Mn(m) (half life = 21.1 min) and 53Fe (half life = 8.51 min). After about an hour the exposure rate will be ~ 0.01 mR/h at I meter.
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