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Radioactivity

Radioactivity. Radioactivity. The spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay. Nuclear Radiation. Spontaneous breakdown or decay of atomic nuclei. Nuclear Radiation.

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Radioactivity

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  1. Radioactivity

  2. Radioactivity • The spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay.

  3. Nuclear Radiation • Spontaneous breakdown or decay of atomic nuclei

  4. Nuclear Radiation • Absorption of nuclear radiation. Alpha radiation will be absorbed by a piece of paper, beta by a plank of wood and gamma and neutron radiation by a block of concrete or lead.

  5. Half-life • The time required for ½ of any original number of parent atoms to decay.

  6. Half-life • What is the half-life of Cesium-137? • 30 years • When 25% of the radioactive Cesium material remains, how old is it? • 60 years

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