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Close-up of radiation source in smoke detector

Close-up of radiation source in smoke detector

T356/0291

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Credit

CHRIS PRIEST / SCIENCE PHOTO LIBRARY 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.

Release details

Model release not required. Property release not required.

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