Arsenic Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
60As | 59.99313 (64) |
|
|
| -6,400 (600) | 7,750 (10) | p ? |
|
61As | 60.98062 (64) |
|
|
| -18,050 (600) | 7,940 (10) | p ? |
|
62As | 61.97320 (32) |
|
|
| -24,960 (300) | 8,058 (5) | p ? |
|
63As | 62.96369 (54) |
|
|
| -33,820 (500) | 8,198 (8) | p ? |
|
64As | 63.95757 (38) |
| 40 | ms | -39,520 (360) | 8,285 (6) | B+ | 100 |
65As | 64.94956 (32) |
| 170 | ms | -46,980 (300) | 8,397 (5) | B+ | 100 |
66As | 65.94471 (73) |
| 95.77 | ms | -51,500 (680) | 8,460 (10) | B+ | 100 |
67As | 66.93919 (11) |
| 42.5 | s | -56,650 (100) | 8,531 (1.5) | B+ | 100 |
68As | 67.936769 (47) |
| 151.6 | s | -58,899 (43) | 8,557.8 (6.4) | B+ | 100 |
69As | 68.932274 (34) |
| 15.2 | m | -63,087 (31) | 8,611.5 (4.5) | B+ | 100 |
70As | 69.930925 (54) |
| 52.6 | m | -64,343 (50) | 8,621.7 (7.1) | B+ | 100 |
71As | 70.9271124 (45) |
| 65.28 | h | -67,894.3 (4.2) | 8,663.95 (5.9) | B+ | 100 |
72As | 71.9267523 (47) |
| 26 | h | -68,229.8 (4.4) | 8,660.38 (6.1) | B+ | 100 |
73As | 72.9238248 (42) |
| 80.3 | d | -70,956.7 (3.9) | 8,689.66 (5.4) | EC | 100 |
74As | 73.9239287 (25) |
| 17.77 | d | -70,860.0 (2.3) | 8,680.00 (3.2) | B+ | 66 2 |
75As | 74.9215965 (20) | 100 | stable |
| -73,032.4 (1.8) | 8,700.85 (2.4) |
|
|
76As | 75.9223940 (20) |
| 1.0778 | d | -72,289.5 (1.8) | 8,682.79 (2.4) | B-~100 |
|
77As | 76.9206473 (25) |
| 38.83 | h | -73,916.6 (2.3) | 8,695.98 (3) | B- | 100 |
78As | 77.921827 (11) |
| 90.7 | m | -72,817.4 (9.9) | 8,673.9 (1.3) | B- | 100 |
79As | 78.9209479 (60) |
| 9.01 | m | -73,636.5 (5.6) | 8,676.62 (7.1) | B- | 100 |
80As | 79.922534 (25) |
| 15.2 | s | -72,159 (23) | 8,650.6 (2.9) | B- | 100 |
81As | 80.9221323 (59) |
| 33.3 | s | -72,533.3 (5.5) | 8,648.06 (6.8) | B- | 100 |
82As | 81.92450 (21) |
| 19.1 | s | -70,320 (200) | 8,614 (2.4) | B- | 100 |
83As | 82.92498 (24) |
| 13.4 | s | -69,880 (220) | 8,602 (2.7) | B- | 100 |
84As | 83.92906 (32) |
| 4.02 | s | -66,080 (300) | 8,551 (4) | B- | 100 |
85As | 84.93202 (21) |
| 2.021 | s | -63,320 (200) | 8,513 (2) | B- | 100 |
86As | 85.93650 (32) |
| 945 | ms | -59,150 (300) | 8,459 (3) | B- | 100 |
87As | 86.93990 (32) |
| 610 | ms | -55,980 (300) | 8,418 (3) | B- | 100 |
88As | 87.94494 (54) |
| 300 | ms | -51,290 (500) | 8,361 (6) | B- ? |
|
89As | 88.94939 (54) |
| 200 | ms | -47,140 (500) | 8,311 (6) | B- ? |
|
90As | 89.95550 (86) |
| 80 | ms | -41,450 (800) | 8,245 (9) | B- ? |
|
91As | 90.96043 (97) |
| 50 | ms | -36,860 (900) | 8,190 (10) | B- ? |
|
92As | 91.96680 (97) |
| 30 | ms | -30,930 (900) | 8,130 (10) | B- ? |
|
60mAs | 59.99313 (64) |
|
|
| -6,400 (600) | 7,750 (10) | p ? |
|
66mAs | 65.94471 (73) |
| 1.1 | us | -51,500 (680) | 8,460 (10) | IT | 100 |
68mAs | 67.936769 (47) |
| 111 | s | -58,899 (43) | 8,557.8 (6.4) | IT | 100 |
70mAs | 69.930925 (54) |
| 96 | us | -64,343 (50) | 8,621.7 (7.1) | IT | 100 |
75mAs | 74.9215965 (20) |
| 17.62 | ms | -73,032.4 (1.8) | 8,700.85 (2.4) | IT | 100 |
76mAs | 75.9223940 (20) |
| 1.84 | us | -72,289.5 (1.8) | 8,682.79 (2.4) | 0 |
|
77mAs | 76.9206473 (25) |
| 114 | us | -73,916.6 (2.3) | 8,695.98 (3) | IT | 100 |
79mAs | 78.9209479 (60) |
| 1.21 | us | -73,636.5 (5.6) | 8,676.62 (7.1) | IT | 100 |
82mAs | 81.92450 (21) |
| 13.6 | s | -70,320 (200) | 8,614 (2.4) | B- | 100 |
84mAs | 83.92906 (32) |
| 650 | ms | -66,080 (300) | 8,551 (4) | B- | 100 |
66m1As | 65.94471 (73) |
| 8.2 | us | -51,500 (680) | 8,460 (10) | IT | 100 |
Data Source: ENSDF March 2005
©Radiochemistry Society 2005