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Radioactive decay #1 HTML5

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Summary

Contrary to popular opinion, radiation is a natural phenomenon. It was discovered in 1896 by A.H. Becquerel who was studying the fluorescent properties of uranium salts.

We identify 3 distinct types of radioactive decay. Each type of decay liberates a large amount of energy:

  1. Alpha radiation: the emission of a helium atom.
  2. Beta (+ and -) radiation: the emission of either an electron (beta-) or a positron (beta+).
  3. Gamma emission: the liberation of a high-energy photon.

Rollover each type of radioactive decay.

Learning goals

  • To distinguish the different types of radioactive decay.
  • To specify that nearly all alpha decay or beta decay are accompanied by gamma emissions.
  • To define the becquerel (Bq), a unit of measurement of activity in a radioactive sample (number of decays per second).
  • To show that there are forms of ionizing radiation with very different penetrating properties. Gamma photons have strong penetrating properties which are used in nuclear medicine.

 

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Contrary to popular opinion, radioactivity is a natural phenomenon. It was discovered in 1896 by A.H. Becquerel when he was studying uranium salts. The word radioactivity was coined
in 1898 by…

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