Half Life Flashcards
1
Q
Definition of half life :
A
Time it takes for activity of a radioactive source to have
2
Q
After 3 half lives how much of the original product will have decayed ?
A
12.5
3
Q
Use, type of radiation, half life
Tracer
A
Use : radioactive material injected into body and camera are used to make an image of where radiation is
Type : gamma
Half life : short
4
Q
Use, type of radiation, half life
Smoke detectors
A
Use : Radiation in detector ionises air, which creates a current
If smoke in detector it would block radiation and current would change setting off alarm
Type : alpha
Half life : long
