A banana has around 14 bequerels per banana, based on Chiquita information, of how much potassium is in a banana. The counts per minute equivalent would be 840. Radioactive Potassium (K40) does emit gamma radiation. This video goes into radiation emitted by a banana, or anything else with that much potassium inside of it. Should we be … Continue reading Radioactive Bananas? Peeling The Mystery