Berkelium Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
235Bk | 235.05658 (43) |
| 20 | s | 52,700 (400) | 7,524 (2) | B+ ? |
|
236Bk | 236.05733 (43) |
| 1 | m | 53,400 (400) | 7,523 (2) | B+ ? |
|
237Bk | 237.05700 (24) |
| 1 | m | 53,100 (220) | 7,527 (1) | B+ ? |
|
238Bk | 238.05828 (31) |
| 2.4 | m | 54,290 (290) | 7,524 (1) | B+~100 |
|
239Bk | 239.05828 (25) |
| 3 | m | 54,290 (230) | 7,527 (1) | B+ ? |
|
240Bk | 240.05976 (16) |
| 4.8 | m | 55,670 (150) | 7,523 (1) | B+ ? |
|
241Bk | 241.06023 (22) |
| 4.6 | m | 56,100 (200) | 7,524 (1) | A ? |
|
242Bk | 242.06198 (22) |
| 7 | m | 57,740 (200) | 7,519 (1) | B+~100 |
|
243Bk | 243.0630076 (51) |
| 4.5 | h | 58,691.2 (4.7) | 7,517.50 (2) | B+~100 |
|
244Bk | 244.065181 (16) |
| 4.35 | h | 60,716 (14) | 7,511.47 (5.9) | B+ ? |
|
245Bk | 245.0663616 (25) |
| 4.94 | d | 61,815.4 (2.3) | 7,509.264 (9) | EC~100 |
|
246Bk | 246.068673 (64) |
| 1.8 | d | 63,968 (60) | 7,502.8 (2.4) | B+~100 |
|
247Bk | 247.0703071 (59) |
| 1.38 | ky | 65,490.6 (5.5) | 7,498.94 (2.2) | A~100 |
|
248Bk | 248.073086 (76) |
| >9 | y | 68,080 (71) | 7,491 (0) | A ? |
|
249Bk | 249.0749867 (28) |
| 330 | d | 69,849.6 (2.6) | 7,486.03 (1) | B-~100 |
|
250Bk | 250.0783165 (43) |
| 3.212 | h | 72,951.4 (4) | 7,475.96 (1.6) | B- | 100 |
251Bk | 251.080760 (12) |
| 55.6 | m | 75,228 (11) | 7,469.26 (4.4) | B- | 100 |
252Bk | 252.08431 (22) |
| 1.8 | m | 78,530 (200) | 7,459 (1) | B- | ? |
253Bk | 253.08688 (39) |
| 10 | m | 80,930 (360) | 7,451 (1) | B- ? |
|
254Bk | 254.09060 (32) |
| 1 | m | 84,390 (300) | 7,440 (1) | B- ? | |
242mBk | 242.06198 (22) |
| 600 | ns | 57,740 (200) | 7,519 (1) | SF~100 |
|
248mBk | 248.073086 (76) |
| 23.7 | h | 68,080 (71) | 7,491 (0) | B- | 70 5 |
249mBk | 249.0749867 (28) |
| 300 | us | 69,849.6 (2.6) | 7,486.03 (1) | IT | 100 |
250mBk | 250.0783165 (43) |
| 29 | us | 72,951.4 (4) | 7,475.96 (1.6) | IT | 100 |
251mBk | 251.080760 (12) |
| 58 | us | 75,228 (11) | 7,469.26 (4.4) | IT | 100 |
250m1Bk | 250.0783165 (43) |
| 213 | us | 72,951.4 (4) | 7,475.96 (1.6) | IT ? |
|
237mBk | 237.05700 (24) |
|
|
| 53,100 (220) | 7,527 (1) | 0 |
|
238mBk | 238.05828 (31) |
|
|
| 54,290 (290) | 7,524 (1) | 0 |
|
239mBk | 239.05828 (25) |
|
|
| 54,290 (230) | 7,527 (1) | 0 |
|
240mBk | 240.05976 (16) |
|
|
| 55,670 (150) | 7,523 (1) | 0 |
|
241mBk | 241.06023 (22) |
|
|
| 56,100 (200) | 7,524 (1) | 0 |
|
242mBk | 242.06198 (22) |
|
|
| 57,740 (200) | 7,519 (1) | 0 |
|
243mBk | 243.0630076 (51) |
|
|
| 58,691.2 (4.7) | 7,517.50 (2) | 0 |
|
244mBk | 244.065181 (16) |
|
|
| 60,716 (14) | 7,511.47 (5.9) | 0 |
|
245mBk | 245.0663616 (25) |
|
|
| 61,815.4 (2.3) | 7,509.264 (9) | 0 |
|
248m1Bk | 248.073086 (76) |
|
|
| 68,080 (71) | 7,491 (0) | 0 |
|
Data Source: ENSDF March 2005
©Radiochemistry Society 2005