Iron Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
45Fe | 45.01458 (24) |
| 4.9 | ms | 13,580 (220) | 7,318 (5) | 2p | 75 5 |
46Fe | 46.00081 (38) |
| 9 | ms | 760 (350) | 7,613 (8) | B+ | 100 |
47Fe | 46.99289 (28) |
| 21.8 | ms | -6,620 (260) | 7,779 (6) | B+ | 100 |
48Fe | 47.980504 (75) |
| 44 | ms | -18,160 (70) | 8,026 (1) | B+ | 100 |
49Fe | 48.97361 (16) |
| 70 | ms | -24,580 (150) | 8,158 (3) | B+ | 100 |
50Fe | 49.962989 (64) |
| 155 | ms | -34,476 (60) | 8,354 (1.2) | B+ | 100 |
51Fe | 50.956820 (16) |
| 305 | ms | -40,222 (15) | 8,461.1 (2.9) | B+ | 100 |
52Fe | 51.9481139 (70) |
| 8.275 | h | -48,331.6 (6.5) | 8,609.6 (1.3) | B+ | 100 |
53Fe | 52.9453079 (19) |
| 8.51 | m | -50,945.3 (1.8) | 8,648.76 (3.3) | B+ | 100 |
54Fe | 53.93961050 (74) | 5.845 (35) | stable |
| -56,252.46 (69) | 8,736.34 (1.3) |
|
|
55Fe | 54.93829336 (74) |
| 2.737 | y | -57,479.37 (69) | 8,746.56 (1.2) | EC | 100 |
56Fe | 55.93493748 (74) | 91.754 (36) | stable |
| -60,605.35 (68) | 8,790.32 (1.2) |
|
|
57Fe | 56.93539397 (74) | 2.119 (10) | stable |
| -60,180.13 (69) | 8,770.25 (1.2) |
|
|
58Fe | 57.93327556 (76) | 0.282 (4) | stable |
| -62,153.42 (70) | 8,792.22 (1.2) |
|
|
59Fe | 58.93487546 (76) |
| 44.495 | d | -60,663.11 (71) | 8,754.74 (1.2) | B- | 100 |
60Fe | 59.9340717 (37) |
| 1.5 | My | -61,411.8 (3.5) | 8,755.83 (5.8) | B- | 100 |
61Fe | 60.936745 (21) |
| 5.98 | m | -58,921 (20) | 8,703.8 (3.3) | B- | 100 |
62Fe | 61.936767 (16) |
| 68 | s | -58,901 (14) | 8,693.2 (2.3) | B- | 100 |
63Fe | 62.94037 (18) |
| 6.1 | s | -55,550 (170) | 8,630 (2.7) | B- | 100 |
64Fe | 63.94120 (30) |
| 2 | s | -54,770 (280) | 8,609 (4.3) | B- | 100 |
65Fe | 64.94538 (26) |
| 1.3 | s | -50,880 (240) | 8,541 (3.7) | B- | 100 |
66Fe | 65.94678 (32) |
| 440 | ms | -49,570 (300) | 8,514 (4.6) | B- | 100 |
67Fe | 66.95095 (45) |
| 394 | ms | -45,690 (420) | 8,450 (6.2) | B- | 100 |
68Fe | 67.95370 (75) |
| 187 | ms | -43,130 (700) | 8,410 (10) | B- | 100 |
69Fe | 68.95878 (54) |
| 109 | ms | -38,400 (500) | 8,333 (7) | B- | 100 |
70Fe | 69.96146 (64) |
| 94 | ms | -35,900 (600) | 8,294 (9) | B- | 100 |
71Fe | 70.96672 (86) |
| 30 | ms | -31,000 (800) | 8,220 (11) | B- ? |
|
72Fe | 71.96962 (86) |
| 10 | ms | -28,300 (800) | 8,180 (11) | B- ? |
|
47mFe | 46.99289 (28) |
|
|
| -6,620 (260) | 7,779 (6) | IT ? |
|
52mFe | 51.9481139 (70) |
| 45.9 | s | -48,331.6 (6.5) | 8,609.6 (1.3) | B+~100 |
|
53mFe | 52.9453079 (19) |
| 2.526 | m | -50,945.3 (1.8) | 8,648.76 (3.3) | IT | 100 |
54mFe | 53.93961050 (74) |
| 364 | ns | -56,252.46 (69) | 8,736.34 (1.3) | IT | 100 |
61mFe | 60.936745 (21) |
| 250 | ns | -58,921 (20) | 8,703.8 (3.3) | IT | 100 |
65mFe | 64.94538 (26) |
| 430 | ns | -50,880 (240) | 8,541 (3.7) | IT | 100 |
67mFe | 66.95095 (45) |
| 64 | us | -45,690 (420) | 8,450 (6.2) | IT | 100 |
Data Source: ENSDF March 2005
©Radiochemistry Society 2005