Close-up of radiation source in smoke detector

Close-up of radiation source in smoke detector

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Credit: CHRIS PRIEST/SCIENCE PHOTO LIBRARY

Caption: Close-up of part of a smoke detector, showing a chamber containing a sample of the radioactive isotope Americium 241. Any smoke entering the chamber is ionised by the radiation and conducts a current, setting off the smoke alarm.

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Keywords: americium 241, device, electronic, electronics, in smoke alarm, inside view, non-integrated, radiation, radiation source, smoke alarm, smoke detector, technology equipment, use in smoke alarm

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