Francium Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
199Fr | 199.007258 (45) |
| 16 | ms | 6,761 (42) | 7,695.3 (2.1) | A~100 |
|
200Fr | 200.006572 (84) |
| 24 | ms | 6,122 (78) | 7,700.4 (3.9) | A | 100 |
201Fr | 201.003861 (77) |
| 61 | ms | 3,596 (71) | 7,714.8 (3.6) | A~100 |
|
202Fr | 202.003373 (53) |
| 290 | ms | 3,142 (49) | 7,718.8 (2.4) | A | ? |
203Fr | 203.000925 (17) |
| 550 | ms | 861 (16) | 7,731.78 (7.8) | A | ? |
204Fr | 204.000653 (26) |
| 1.7 | s | 608 (25) | 7,734.7 (1.2) | A | 96 2 |
205Fr | 204.9985940 (84) |
| 3.85 | s | -1,309.7 (7.8) | 7,745.69 (3.8) | A~100 |
|
206Fr | 205.998666 (30) |
| ~16 | s | -1,243 (28) | 7,746.9 (1.4) | B+ | ? |
207Fr | 206.996949 (54) |
| 14.8 | s | -2,842 (51) | 7,756.2 (2.4) | A | 95 2 |
208Fr | 207.997139 (50) |
| 59.1 | s | -2,665 (47) | 7,756.9 (2.2) | A | 90 4 |
209Fr | 208.995954 (16) |
| 50 | s | -3,769 (15) | 7,763.69 (7) | A | 89 3 |
210Fr | 209.996408 (24) |
| 3.18 | m | -3,346 (22) | 7,763.1 (1.1) | A | 60 30 |
211Fr | 210.995537 (23) |
| 3.1 | m | -4,158 (21) | 7,768.4 (1) | A>80 |
|
212Fr | 211.996202 (28) |
| 20 | m | -3,538 (26) | 7,766.9 (1.2) | B+ | 57 2 |
213Fr | 212.9961891 (82) |
| 34.6 | s | -3,549.8 (7.7) | 7,768.43 (3.6) | A | 99.45 3 |
214Fr | 213.9989711 (94) |
| 5 | ms | -958.4 (8.8) | 7,757.74 (4.1) | A | 100 |
215Fr | 215.0003415 (76) |
| 86 | ns | 318.1 (7.1) | 7,753.26 (3.3) | A | 100 |
216Fr | 216.003198 (15) |
| 700 | ns | 2,979 (14) | 7,742.41 (6.6) | A | 100 |
217Fr | 217.0046320 (70) |
| 16.8 | us | 4,314.6 (6.5) | 7,737.77 (3) | A | 100 |
218Fr | 218.0075783 (51) |
| 1 | ms | 7,059.2 (4.8) | 7,726.72 (2.2) | A | |
219Fr | 219.0092521 (76) |
| 20 | ms | 8,618.3 (7.1) | 7,721.17 (3.2) | A | 100 |
220Fr | 220.0123274 (44) |
| 27.4 | s | 11,482.9 (4.1) | 7,709.74 (1.9) | A~100 |
|
221Fr | 221.0142548 (51) |
| 4.9 | m | 13,278.2 (4.8) | 7,703.25 (2.2) | A~100 |
|
222Fr | 222.017552 (23) |
| 14.2 | m | 16,349 (21) | 7,691.08 (9.6) | B- | 100 |
223Fr | 223.0197359 (26) |
| 22 | m | 18,383.8 (2.4) | 7,683.66 (1.1) | B-~100 |
|
224Fr | 224.023250 (54) |
| 3.33 | m | 21,657 (50) | 7,670.8 (2.2) | B- | 100 |
225Fr | 225.025565 (32) |
| 4 | m | 23,814 (30) | 7,663.0 (1.3) | B- | 100 |
226Fr | 226.02939 (11) |
| 49 | s | 27,370 (100) | 7,649.0 (4.4) | B- | 100 |
227Fr | 227.03184 (11) |
| 2.47 | m | 29,650 (100) | 7,640.8 (4.4) | B- | 100 |
228Fr | 228.03573 (22) |
| 38 | s | 33,280 (200) | 7,627 (1) | B- | 100 |
229Fr | 229.038450 (40) |
| 50.2 | s | 35,816 (37) | 7,617.7 (1.6) | B- | 100 |
230Fr | 230.04251 (48) |
| 19.1 | s | 39,600 (450) | 7,603 (2) | B- | 100 |
231Fr | 231.04544 (50) |
| 17.6 | s | 42,330 (470) | 7,593 (2) | B- | 100 |
232Fr | 232.04977 (69) |
| 5 | s | 46,360 (640) | 7,578 (3) | B- | 100 |
200mFr | 200.006572 (84) |
| 650 | ms | 6,122 (78) | 7,700.4 (3.9) | A~100 |
|
202mFr | 202.003373 (53) |
| 340 | ms | 3,142 (49) | 7,718.8 (2.4) | A | ? |
204mFr | 204.000653 (26) |
| 2.6 | s | 608 (25) | 7,734.7 (1.2) | A | 90 2 |
206mFr | 205.998666 (30) |
| 15.9 | s | -1,243 (28) | 7,746.9 (1.4) | A | 42 24 |
214mFr | 213.9989711 (94) |
| 3.35 | ms | -958.4 (8.8) | 7,757.74 (4.1) | A | 100 |
218mFr | 218.0075783 (51) |
| 22 | ms | 7,059.2 (4.8) | 7,726.72 (2.2) | A~100 |
|
204m1Fr | 204.000653 (26) |
| 1.7 | s | 608 (25) | 7,734.7 (1.2) | A | 74 8 |
206m1Fr | 205.998666 (30) |
| 700 | ms | -1,243 (28) | 7,746.9 (1.4) | IT | ? |
218m1Fr | 218.0075783 (51) |
|
|
| 7,059.2 (4.8) | 7,726.72 (2.2) | 0 |
|
Data Source: ENSDF March 2005
©Radiochemistry Society 2005