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15 cards from this deck
Unstable atoms breaking down
Radioactive decay
Random/unpredictable
2 protons + 2 neutrons (helium nuclei)
+2+2+2
Paper or a few cm of air
High-speed electrons
−1-1−1
Few millimetres of aluminium
Electromagnetic radiation
No mass, no charge
Thick lead or concrete
Alpha >>> Beta >>> Gamma >>> Neutron
Neutron ≈\approx≈ Gamma >>> Beta >>> Alpha
Inversely related (high ionising = low penetrating)
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