Einsteinium Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
240Es | 240.06892 (43) |
| 1 | s | 64,200 (400) | 7,481 (2) | A ? |
|
241Es | 241.06854 (24) |
| 10 | s | 63,840 (230) | 7,485 (1) | A | ? |
242Es | 242.06975 (35) |
| 13.5 | s | 64,970 (330) | 7,483 (1) | A | ? |
243Es | 243.06955 (25) |
| 21 | s | 64,780 (230) | 7,486 (1) | B+ LE 70 |
|
244Es | 244.07088 (20) |
| 37 | s | 66,030 (180) | 7,483 (1) | B+ | ? |
245Es | 245.07132 (22) |
| 1.1 | m | 66,440 (200) | 7,484 (1) | B+ | 60 10 |
246Es | 246.07290 (24) |
| 7.7 | m | 67,900 (220) | 7,480 (1) | B+ | 90.1 18 |
247Es | 247.073656 (33) |
| 4.6 | m | 68,610 (30) | 7,480 (0) | B+~93 |
|
248Es | 248.075471 (56) |
| 27 | m | 70,301 (52) | 7,476 (0) | B+~100 |
|
249Es | 249.076411 (32) |
| 102.2 | m | 71,176 (30) | 7,474 (0) | B+~100 |
|
250Es | 250.07861 (11) |
| 8.6 | h | 73,230 (100) | 7,469 (0) | B+>97 |
|
251Es | 251.0799921 (65) |
| 33 | h | 74,512.2 (6.1) | 7,465.88 (2.4) | EC ? |
|
252Es | 252.082979 (54) |
| 471.7 | d | 77,294 (50) | 7,457.2 (2) | A | 78 2 |
253Es | 253.0848247 (28) |
| 20.47 | d | 79,013.7 (2.6) | 7,452.87 (1) | A | 100 |
254Es | 254.0880220 (46) |
| 275.7 | d | 81,992.0 (4.2) | 7,443.58 (1.7) | A~100 |
|
255Es | 255.090273 (12) |
| 39.8 | d | 84,089 (11) | 7,437.82 (4.3) | B- | 92.0 4 |
256Es | 256.09360 (11) |
| 25.4 | m | 87,190 (100) | 7,428 (0) | B- | 100 |
257Es | 257.09598 (44) |
| 7.7 | d | 89,400 (410) | 7,422 (2) | B- | 100 |
258Es | 258.09952 (32) |
| 3 | m | 92,700 (300) | 7,412 (1) | B- ? |
|
248mEs | 248.075471 (56) |
| 41 | m | 70,301 (52) | 7,476 (0) | 0 | |
250mEs | 250.07861 (11) |
| 2.22 | h | 73,230 (100) | 7,469 (0) | B+~100 |
|
254mEs | 254.0880220 (46) |
| 39.3 | h | 81,992.0 (4.2) | 7,443.58 (1.7) | B- | 98 2 |
256mEs | 256.09360 (11) |
| 7.6 | h | 87,190 (100) | 7,428 (0) | B-~100 |
|
241mEs | 241.06854 (24) |
|
|
| 63,840 (230) | 7,485 (1) | 0 |
|
243mEs | 243.06955 (25) |
|
|
| 64,780 (230) | 7,486 (1) | 0 |
|
244mEs | 244.07088 (20) |
|
|
| 66,030 (180) | 7,483 (1) | 0 |
|
245mEs | 245.07132 (22) |
|
|
| 66,440 (200) | 7,484 (1) | 0 |
|
246mEs | 246.07290 (24) |
|
|
| 67,900 (220) | 7,480 (1) | 0 |
|
247mEs | 247.073656 (33) |
|
|
| 68,610 (30) | 7,480 (0) | 0 |
|
245m1Es | 245.07132 (22) |
|
|
| 66,440 (200) | 7,484 (1) | 0 |
|
Data Source: ENSDF March 2005
©Radiochemistry Society 2005