U235 Decay Series
Isotope half-life gamma energies
(KeV)
|
U235 |
7.038
x 108 years |
143.8
(10.96%) 163.33
(5.08%) 185.7
(57.2%) 205.3
(5.01%) |
|
Th231 |
25.5
hours |
25.64
(14.6%) 84.2
(6.71%) |
|
Pa231 |
3.25
x 104 years |
27.4
(11.1%) 300
(2.41%) 302.7
(2.47%) |
|
Ac227 |
21.6
years |
70
(0.08%) |
|
98.6% 1.4% Th227 Fr223 |
18.2
days 22 minutes |
50.1
(8.5%) 236.0
(11.2%) 256.3
(6.8%) 300
(2.0%) 329.9
(2.75%) 50.1 (36%) 79.7 (9.1%) 234.8 (3%) |
|
Ra223 |
11.43
days |
144.2
(3.26%) 154.2
(5.59%) 158.6
(0.69%) 269.5
(13.6%) 323.9
(3.90%) 338.3
(2.78%) |
|
Rn219 |
4
seconds |
271.2
(9.9%) 401.8
(6.64%) |
|
Po215 |
1.78
millisec |
------ |
|
Pb211 |
36.1
minutes |
404.9
(3.83%) 427.1
(1.72%) 832.0
(3.81%) |
|
Bi211 |
2.15
minutes |
351.1
(12.8%) |
|
0.28% 99.7% Po211 Tl207 |
0.52
seconds 4.79 minutes |
569.6
(0.0016%) 897.8
(0.26%) 897 (0.16%) |
|
Pb207 |
stable |
------ |