- 24.3: Detection of Radioactivity
- Radioactivity is determined by measuring the number of decay processes per unit time. Perhaps the easiest way is simply to determine the number of counts/minute, with each count measuring a single decay process, such as the emission of an αα -particle. A particular isotope may have an activity of 5,000 counts/minute (cpm) while another isotope might only have 250cpm. The amount of activity gives a rough indication of the amount of the radioisotope present.
- 24.4: Half-Life
- Half-life is defined. Calculations involving half-life are described.
Contributors and Attributions
CK-12 Foundation by Sharon Bewick, Richard Parsons, Therese Forsythe, Shonna Robinson, and Jean Dupon.