U235 Decay Series
Characteristic X-Rays
Isotope half-life X-Ray energies
(KeV)
|
U235 |
7.038
x 108 years |
16.2
(31%) 90.0
(3.56%) 93.4
(5.81%) 105.2
(2.01%) |
|
Th231 |
25.5
hours |
16.7
(96%) |
|
Pa231 |
3.25
x 104 years |
15.7
(44.8%) |
|
Ac227 |
21.6
years |
------ |
|
98.6% 1.4% Th227 Fr223 |
18.2
days 22 minutes |
15.2
(42%) 85.4
(1.86%) 88.5
(3.06%) 99.8
(1.06%) 15.2 (23.9%) 85.4 (1.69%) 88.5 (2.8%) |
|
Ra223 |
11.43
days |
14.3
(24.5%) 81.1
(15%) 83.8
(24.9%) 94.6
(8.59%) 97.3
(2.8%) |
|
Rn219 |
4
seconds |
13.4
(1.01%) |
|
Po215 |
1.78
millisec |
------ |
|
Pb211 |
36.1
minutes |
------ |
|
Bi211 |
2.15
minutes |
12.2
(1.02%) 72.9
(1.25%) |
|
0.28% 99.7% Po211 Tl207 |
0.52
seconds 4.79 minutes |
------ ------ |
|
Pb207 |
stable |
------ |