P6 Flashcards
1
Q
what is a fission chain reaction
A
uranium absorbs a nuetron
becomes unstable
emits nuetrons and releases energy
more uranium particles absorb those nuetrons emitted
2
Q
how is gamma used in radio therapy
A
beam of gamma aimed at tumour beam is rotated to give tumour large dose and surounding cells take minimal dose
3
Q
how can alpha particles be used in radioactive implants
A
inject alpha particles into tumour
very short range only kills tumour cells
4
Q
why is alpha radiation the ost dangerous when in the body
A
Most ionising
very short range stopped by a few cm of air
5
Q
hwo can beta radiation be used in radioactive implants
A
placed next to tumour
quite short range most damage to tumour
