Atomic and Nuclear Physics
A sample of material contains 20 micrograms of californium-252.
Californium-252 has a half-life of 2.638 years.
The number of californium-252 atoms initially present
The activity of the californium-252 in curies
The number of californium-252 atoms that will remain in 12 years
The time it will take for the activity to reach 0.001 curies
The number of atoms of californium-252 can be determined as below.
First, use Equation (1-6) to calculate the decay constant.
Use this value for the decay constant in Equation (1-3) to determine the activity.