Nobelium Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
248No | 248.08660 (32) |
| <2 | us | 80,660 (300) | 7,424 (1) | SF ? |
|
249No | 249.08783 (37) |
| 57 | us | 81,820 (340) | 7,422 (1) | B+ ? |
|
250No | 250.08751 (22) |
| 5.7 | us | 81,520 (200) | 7,426 (1) | SF~100 |
|
251No | 251.08901 (19) |
| 760 | ms | 82,910 (180) | 7,423 (1) | A | 83 16 |
252No | 252.088977 (14) |
| 2.44 | s | 82,881 (13) | 7,425.76 (5.2) | A~67 |
|
253No | 253.09068 (11) |
| 1.62 | m | 84,470 (100) | 7,422 (0) | A | ? |
254No | 254.090955 (19) |
| 51 | s | 84,724 (18) | 7,423.59 (6.9) | A | 90 4 |
255No | 255.093241 (11) |
| 3.1 | m | 86,854 (10) | 7,417.78 (4) | A | 61 3 |
256No | 256.0942827 (85) |
| 2.91 | s | 87,823.7 (7.9) | 7,416.54 (3.1) | A~100 |
|
257No | 257.096877 (23) |
| 25 | s | 90,241 (22) | 7,409.68 (8.4) | A | ? |
258No | 258.09821 (22) |
| 1.2 | ms | 91,480 (200) | 7,407 (1) | SF~100 |
|
259No | 259.10103 (11) |
| 58 | m | 94,110 (100) | 7,400 (0) | A | 75 4 |
260No | 260.10264 (22) |
| 106 | ms | 95,610 (200) | 7,397 (1) | SF | 100 |
261No | 261.10575 (32) |
| 3 | h | 98,500 (300) | 7,388 (1) | A ? |
|
262No | 262.10730 (48) |
| ~5 | ms | 99,950 (450) | 7,385 (2) | SF~100 |
|
263No | 263.11055 (53) |
| 20 | m | 102,980 (490) | 7,376 (2) | A ? |
|
264No | 264.11235 (69) |
| 1 | m | 104,650 (640) | 7,373 (2) | A ? |
|
251mNo | 251.08901 (19) |
| 1.7 | s | 82,910 (180) | 7,423 (1) | A | 100 |
253mNo | 253.09068 (11) |
| 31 | us | 84,470 (100) | 7,422 (0) | A | ? |
254mNo | 254.090955 (19) |
| 280 | ms | 84,724 (18) | 7,423.59 (6.9) | IT>80 | |
255mNo | 255.093241 (11) |
|
|
| 86,854 (10) | 7,417.78 (4) | 0 |
|
257mNo | 257.096877 (23) |
|
|
| 90,241 (22) | 7,409.68 (8.4) | 0 |
|
259mNo | 259.10103 (11) |
|
|
| 94,110 (100) | 7,400 (0) | 0 |
|
Data Source: ENSDF March 2005
©Radiochemistry Society 2005