Alpha,Beta and Gamma Flashcards
1
Q
Alpha Particle
A
neutrons,2protons,helium nuclei
+2
4
penetration power - stopped by a few cm of air
strongly ionising
weakly deflected
2
Q
Beta Particle
A
High energy electron
-1
1/1860
stopped by a few mm of aluminium
weakly ionising
strongly deflected
3
Q
Gamma Rays
A
High electromagnetic radiation
0
0
reduced by a few cm of lead or several metres of concrete
very weakly ionising
no deflection
4
Q
Where does radiation come from
A
50% radon gas
15% medical
13% gamma rays from buildings
12% cosmic rays
9.5% food and drink
5
Q
Irradiated
A
The source is external to your body
6
Q
Contaminated
A
Radiation is internal to your body
7
Q
A
