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RE: How onions have inspired particle physicists to design their detectors
Bananas contain potassium, about 400-450 mg per banana.
Some 5 mg of which is potassium 40.
There are 3 types of decay, boring Beta(-), positive electron capture and... Beta(+)
Radioactivity of banana is about 15 Bq (31 Bq per 1 g of K), or 1/15 s x 0.001 for Beta(+) x 0.01 to kill % ~ 115 minutes or so, 1/75 min myth seems ok...
My exclamation was more about thinking to the idea than the idea itself! :)
Just for other readers...