Radiation In Life (P1) Flashcards
1
Q
Tracers
A
-used to track the path of an atom Te 99M 6 hour half life Gamma rays Introducing a new isotope to the body increases the risk of tumours
2
Q
PET scans
A
Lets you see any area with a metabolic increase
F18
20 minute half life
Allows investigation without cutting a person open
Radioactive source in the body
3
Q
Gamma knife
A
Gamma particles deposit energy throughout the body Beta electrons deposit energy in the affected areas Cobalt 60 5 year half life Doesn’t make you radioactive -hair loss in the area Losing appetite Red skin Diarrhoea
4
Q
Internal radiation
A
Iodine 131 Solid or liquid 8 day half life Thyroid naturally collects iodine Takes 1 week Less radiation Might give off a low level of radioactivity so have to stay alone
5
Q
Background radiation
A
50% rocks 15% buildings and ground 10% space 12% food and drink 12% medical uses 0.5% people, animals 0.5% nuclear power plants and weapons testing
6
Q
Irradiation
A
Exposing an object to nuclear radiation, does not become radioactive
Can damage living cells
7
Q
Contamination
A
Unwanted materials containing radioactive atoms on or in other materials
