Radioactive Decay Activity and Half-Life Quiz

The activity of a radioactive source is the number of nuclei that decay each second.

The half-life is the time taken for half the nuclei in the source to decay.

The absorbed dose, the type of radiation, and the type of tissue absorbing the radiation.

<p>The equivalent dose is the product of the absorbed dose and the radiation weighting factor.</p> Signup and view all the answers

<p>Equivalent dose rate is usually measured in mSv y-1 or Sv h-1.</p> Signup and view all the answers

<p>Natural sources include radon gas, gamma rays from the ground, carbon and potassium in the body, and cosmic rays.</p> Signup and view all the answers

<p>Artificial sources include medical uses (e.g. X-rays), fallout from weapons testing, nuclear accidents (e.g. Chernobyl), and nuclear waste.</p> Signup and view all the answers

<p>Alpha, beta, and gamma</p> Signup and view all the answers

<p>Ionisation is the addition or removal of an electron from an uncharged atom. Alpha radiation is the most strongly ionising.</p> Signup and view all the answers

<p>Isotopes are atoms of the same element with different numbers of neutrons. Unstable isotopes undergo radioactive decay, emitting nuclear radiation, while stable isotopes do not.</p> Signup and view all the answers