Radiation Flashcards
(7 cards)
1
Q
Alpha decay
A
4
2 alpha
2
Q
Beta - decay
A
0
-1 b-
3
Q
Beta + decay
A
0
1 b
4
Q
Neutron decay
A
1
0 n
5
Q
Gamma decay
A
0
0 G
6
Q
What is a half life
A
Average time taken for the number of radioactive nuclei in an isotope to halve
7
Q
How are alpha particles used in fire alarms
A
A weak source of alpha is placed close to two electrodes. The source clauses ionisation and the current flows. Smoke will absorb radiation causing the alarm sound
