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Megan Nolan




Physics Revision notes:
Nuclear Physics

When the protons and neutrons in an atom are unbalanced, if the nucleus has too much energy, an
unstable nucleus is formed. To try and stabilise the nucleus, they emit energy, in the form of
radiation- alpha, beta or gamma.

Alpha () Beta…

Page 2

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Megan Nolan




Health risks of increased radiation exposure include cancers, but some cancers can also be cured, or
reduced, with radiation- this is radiotherapy. Radiotherapy shoots radiation at the cancerous cells; a
low ionising radiation with a short half-life is often used (beta or gamma), it is also important that…

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