This form can be used to calculate caesium-137 inventory in mBq / cm^2 or
radioactivity per unit mass in mBq / g if cumulative counts, counting time
(in seconds), total sample weight (in gram), detected sample weight (in gram),
area of sampling tube (in cm^2), and detect efficiency are properly given.
Cautions are drawn to the units being used.
area of sampling tube
The caesium-137 activity is:
in mBq / cm^2 or in mBq / g