This applet offers an interactive representation of radioactive decay series. The four series represented are Th232, Pu241, U238, and U235. Use the radio buttons to select the series that you would like to study. The Sequence Info button displays a chart that depicts the path of the series with atomic number indicated on the vertical axis on the left, and number of neutrons shown along the bottom.
Colored arrows represent alpha and beta decays.
To return to the main user interface, click the Dismiss button. Initially, a selected series contains all parent material, and the amount is represented by a colored bar on a vertical logarithmic scale. Each line represents a factor of ten. In order to step forward through the sequence by a specified number of years, you may type the appropriate number into the Time Step field and hit Enter . By hitting Enter repeatedly, you can view the series at successive intervals.