Utilize our Radioactive Material Source Strength Calculator to accurately determine the current activity of a radioactive source after a period of decay. Input the initial activity, half-life, and elapsed time to get precise results for radiation safety planning, environmental assessments, and scientific applications.
Formula:
The current activity A(t) is calculated using the formula:
A(t) = A0 × e(- (ln(2) / t1/2) × t)
Where:
A(t) = Current Activity of the radioactive material
A0 = Initial Activity of the radioactive material
t1/2 = Half-life of the radioactive material (time required for half of the atoms to decay)
t = Time elapsed since the initial activity was measured
ln(2) = Natural logarithm of 2 (approximately 0.693)