||This ImageJ PlugIn calculates the number of atoms, N, the
weight, the moles, and the molarity of a radioisotope given the
activity, A, the half-life, and the atomic weight. Please let me
know if there are any errors in the calculation.
An optional version of this plugin can be loaded by holding down the
<alt> key while the plugin loads. The activity is
calculated from counts per second, cps, and detector efficiency.
The idea is that you measure the activity with a detector. The
detector records a certain cps. The efficiency is equal to
cps/dps, where dps is disintegrations per second (aka Bequerels).
A second option can be loaded by holding down the <shift> key
while the plugin loads. Instead of entering the fraction of
radioactive atoms, N*/N, the specific activity can be entered.
Both <alt> and <shift> can be used simultaneously.