Radiation Flashcards
1
Q
Beta minus ionising
A
Weakly ionising
2
Q
How ionising is alpha radiation
A
Strongly ionising
3
Q
Positron decay / beta plus ionising
A
Weakly ionising
4
Q
Gamma ionising
A
Very weakly ionising
5
Q
Alpha radiation stopped by…
A
Paper, will not pass skin unless ingested
6
Q
Beta minus stopped by…
A
Thin aluminium
7
Q
Positron decay stopped by…
A
Annihilated when it meets normal matter because it is antimatter.
8
Q
Gamma radiation stopped by…
A
Thick lead, most penetrating radiation
9
Q
Positron decay changes…
A
Proton to neutron
10
Q
Gamma ray changes…
A
Nothing
11
Q
Beta minus changes…
A
Neutron to proton
12
Q
Alpha particle changes…
A
Atomic mass decrease by 4, atomic number decrease by 2. Create a helium atom.
13
Q
How are neutrons controlled
A
Control rods are lowered in the reactor to slow neutrons.
