Isotope half-life X-Ray energies (KeV)
Th232 |
1.405
x 1010 years |
15.2
(8%) |
|
Ra228 |
6.7
years |
------ |
|
Ac228 |
6.13
hours |
16.2
(36.2%) 90.0
(1.02%) 93.4
(1.66%) 105.2
(0.575%) 108.3
(0.195%) |
|
Th228 |
1.91
years |
15.2
(9.7%) |
|
Ra224 |
3.64
days |
14.3
(0.398%) 81.1
(0.0126%) 83.8
(0.209%) |
|
Rn220 |
55
seconds |
------ |
|
Po216 |
0.15
seconds |
------ |
|
Pb212 |
10.64
hours |
13.0
(15.3%) 74.8
(10.5%) 77.1
(17.6%) 87.1
(6.1%) 89.6
(1.84%) |
|
Bi212 |
60.6
minutes |
12.2
(8.2%) |
|
64.06% 35.94% Po212 Tl208 |
304
nsec 3.1 minutes |
------- 12.6 (2.96%) 72.8 (2.03%) 75.0 (3.43%) 84.7 (1.18%) 87.1 (0.348%) |
|
Pb208 |
stable |
------- |