Half life and Activity + Thickness Control Flashcards
1
Q
What is radioactive decay like in nature
A
random
2
Q
What is half life defined
A
time for number of nuclei of a radioisotope in the sample to half
3
Q
What is activity defined
A
number of decays per second
4
Q
What is activity measured in
A
Bequerels
5
Q
What is the correlation between half life and activity
A
after each half life the activity should also fall by half
6
Q
What source is best for thin foil thickness control
A
beta
7
Q
What source is best for 5mm steel sheets thickness control
A
gamma
8
Q
What source is best for thin clingfilm
A
alpha
