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The Uses of Radioactivity
Smoke detectors:
Alpha radiation is used in a smoke detector. The alpha radiation ionises the air inside
the detector producing lots of carbon particles. The charged particles move across
the gap and the current produced is picked up by a detector a few cms away. If…

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Kill cancer cells in radiotherapy treatment. The size and shape of the tumour
are mapped out very carefully and then a beam of radiation is directed at the
tumour to kill the cancerous

Radiocarbon Dating

The carbon atom is used for researching into the radiocarbon dating. The age of


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