Uranium Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
217U | 217.024369 (93) |
| 26 | ms | 22,699 (87) | 7,635.0 (4) | A | ? |
218U | 218.023536 (33) |
| 6 | ms | 21,923 (31) | 7,640.6 (1.4) | A | 100 |
219U | 219.024919 (61) |
| 55 | us | 23,212 (57) | 7,636.7 (2.6) | A | 100 |
220U | 220.02472 (22) |
| 60 | ns | 23,030 (200) | 7,639 (1) | A ? |
|
221U | 221.02640 (11) |
| 700 | ns | 24,590 (100) | 7,634 (0) | A ? |
|
222U | 222.02609 (11) |
| 1.4 | us | 24,300 (100) | 7,638 (0) | A | 100 |
223U | 223.027739 (76) |
| 21 | us | 25,838 (71) | 7,632.7 (3.2) | A~100 |
|
224U | 224.027605 (27) |
| 940 | us | 25,714 (25) | 7,635.2 (1.1) | A | 100 |
225U | 225.029391 (12) |
| 61 | ms | 27,377 (12) | 7,629.75 (5.1) | A | 100 |
226U | 226.029339 (14) |
| 269 | ms | 27,329 (13) | 7,631.92 (5.8) | A | 100 |
227U | 227.031156 (18) |
| 1.1 | m | 29,022 (17) | 7,626.39 (7.4) | A | 100 |
228U | 228.031374 (16) |
| 9.1 | m | 29,225 (15) | 7,627.46 (6.6) | A>95 |
|
229U | 229.0335059 (64) |
| 58 | m | 31,210.6 (6) | 7,620.72 (2.6) | B+~80 |
|
230U | 230.0339398 (51) |
| 20.8 | d | 31,614.7 (4.8) | 7,620.92 (2.1) | A | 100 |
231U | 231.0362937 (32) |
| 4.2 | d | 33,807.4 (3) | 7,613.38 (1.3) | EC~100 |
|
232U | 232.0371562 (24) |
| 68.9 | y | 34,610.7 (2.2) | 7,611.89 (1) | A | 100 |
233U | 233.0396352 (29) |
| 159.2 | ky | 36,920.0 (2.7) | 7,603.95 (1.2) | A | 100 |
234U | 234.0409521 (20) | 0.0055 (2) | 245.5 | ky | 38,146.6 (1.8) | 7,600.708 (8) |
|
|
235U | 235.0439299 (20) | 0.7200 (51) | 704 | My | 40,920.5 (1.8) | 7,590.907 (8) |
|
|
236U | 236.0455680 (20) |
| 23.42 | My | 42,446.3 (1.8) | 7,586.477 (8) | A | |
237U | 237.0487302 (20) |
| 6.75 | d | 45,391.9 (1.9) | 7,576.094 (8) | B- | 100 |
238U | 238.0507882 (20) | 99.2745 (106) | 4.468 | Gy | 47,308.9 (1.9) | 7,570.120 (8) |
|
|
239U | 239.0542933 (21) |
| 23.45 | m | 50,573.9 (1.9) | 7,558.557 (8) | B- | 100 |
240U | 240.0565920 (55) |
| 14.1 | h | 52,715.1 (5.2) | 7,551.77 (2.1) | B- | 100 |
241U | 241.06033 (32) |
| 5 | m | 56,200 (300) | 7,539 (1) | B- ? |
|
242U | 242.06293 (22) |
| 16.8 | m | 58,620 (200) | 7,532 (1) | B- | 100 |
234mU | 234.0409521 (20) |
| 33.5 | us | 38,146.6 (1.8) | 7,600.708 (8) | 0 |
|
235mU | 235.0439299 (20) |
| ~26 | m | 40,920.5 (1.8) | 7,590.907 (8) | IT | 100 |
236mU | 236.0455680 (20) |
| 115 | ns | 42,446.3 (1.8) | 7,586.477 (8) | 0 |
|
238mU | 238.0507882 (20) |
| 280 | ns | 47,308.9 (1.9) | 7,570.120 (8) | IT | ? |
239mU | 239.0542933 (21) |
| >250 | ns | 50,573.9 (1.9) | 7,558.557 (8) | B- | 100 |
239m1U | 239.0542933 (21) |
| 780 | ns | 50,573.9 (1.9) | 7,558.557 (8) | IT | 100 |
Data Source: ENSDF March 2005
©Radiochemistry Society 2005