Krypton Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
69Kr | 68.96518 (43) |
| 32 | ms | -32,440 (400) | 8,133 (6) | B+ | 100 |
70Kr | 69.95526 (41) |
| 57 | ms | -41,680 (380) | 8,264 (5) | B+ ? |
|
71Kr | 70.94963 (70) |
| 100 | ms | -46,920 (650) | 8,336 (9.2) | B+ | 100 |
72Kr | 71.9420920 (86) |
| 17.16 | s | -53,940.9 (8) | 8,429.3 (1.1) | B+ | 100 |
73Kr | 72.9392892 (71) |
| 28.6 | s | -56,551.8 (6.6) | 8,460.18 (9) | B+ | 100 |
74Kr | 73.9330844 (22) |
| 11.5 | m | -62,331.5 (2) | 8,533.03 (2.8) | B+ | 100 |
75Kr | 74.9309457 (87) |
| 4.29 | m | -64,323.6 (8.1) | 8,553.4 (1.1) | B+ | 100 |
76Kr | 75.9259101 (43) |
| 14.8 | h | -69,014.3 (4) | 8,608.82 (5.3) | B+ | 100 |
77Kr | 76.9246700 (21) |
| 74.4 | m | -70,169.4 (2) | 8,616.84 (2.5) | B+ | 100 |
78Kr | 77.9203648 (12) | 0.35 (1) | stable |
| -74,179.7 (1.1) | 8,661.26 (1.4) |
|
|
79Kr | 78.9200824 (42) |
| 35.04 | h | -74,442.7 (3.9) | 8,657.12 (4.9) | B+ | 100 |
80Kr | 79.9163790 (16) | 2.28 (6) | stable |
| -77,892.5 (1.5) | 8,692.92 (1.8) |
|
|
81Kr | 80.9165920 (21) |
| 229 | ky | -77,694.0 (2) | 8,682.79 (2.5) | EC | 100 |
82Kr | 81.9134836 (19) | 11.58 (14) | stable |
| -80,589.5 (1.8) | 8,710.65 (2.2) |
|
|
83Kr | 82.9141361 (30) | 11.49 (6) | stable |
| -79,981.7 (2.8) | 8,695.62 (3.4) |
|
|
84Kr | 83.9115067 (30) | 57.00 (4) | stable |
| -82,431.0 (2.8) | 8,717.35 (3.3) |
|
|
85Kr | 84.9125273 (21) |
| 10.776 | y | -81,480.3 (1.9) | 8,698.56 (2.3) | B- | 100 |
86Kr | 85.91061073 (11) | 17.30 (22) | stable |
| -83,265.57 (10) | 8,712.027 (1) |
|
|
87Kr | 86.91335486 (29) |
| 76.3 | m | -80,709.43 (27) | 8,675.282 (3) | B- | 100 |
88Kr | 87.914447 (14) |
| 2.84 | h | -79,692 (13) | 8,656.9 (1.5) | B- | 100 |
89Kr | 88.917631 (56) |
| 3.15 | m | -76,727 (52) | 8,617.0 (5.8) | B- | 100 |
90Kr | 89.919517 (20) |
| 32.32 | s | -74,970 (19) | 8,591.4 (2.1) | B- | 100 |
91Kr | 90.923445 (61) |
| 8.57 | s | -71,310 (57) | 8,545.4 (6.3) | B- | 100 |
92Kr | 91.926156 (13) |
| 1.84 | s | -68,785 (12) | 8,512.8 (1.3) | B- | 100 |
93Kr | 92.93127 (11) |
| 1.286 | s | -64,020 (100) | 8,457 (1.1) | B- | 100 |
94Kr | 93.93436 (32) |
| 210 | ms | -61,140 (300) | 8,422 (3) | B- | 100 |
95Kr | 94.93984 (43) |
| 114 | ms | -56,040 (400) | 8,365 (4) | B- | 100 |
96Kr | 95.94307 (54) |
| 80 | ms | -53,030 (500) | 8,330 (5) | B- | 100 |
97Kr | 96.94856 (54) |
| 63 | ms | -47,920 (500) | 8,275 (5) | B- | 100 |
98Kr | 97.95191 (64) |
| 46 | ms | -44,800 (600) | 8,241 (6) | B- | 100 |
99Kr | 98.95760 (64) |
| 40 | ms | -39,500 (600) | 8,186 (6) | B- | 100 |
100Kr | 99.96114 (54) |
| 10 | ms | -36,200 (500) | 8,152 (5) | B- ? |
|
73mKr | 72.9392892 (71) |
| 107 | ns | -56,551.8 (6.6) | 8,460.18 (9) | IT | 100 |
74mKr | 73.9330844 (22) |
| 29 | ns | -62,331.5 (2) | 8,533.03 (2.8) | IT | 100 |
79mKr | 78.9200824 (42) |
| 50 | s | -74,442.7 (3.9) | 8,657.12 (4.9) | IT | 100 |
81mKr | 80.9165920 (21) |
| 13.1 | s | -77,694.0 (2) | 8,682.79 (2.5) | IT~100 |
|
83mKr | 82.9141361 (30) |
| 154.4 | ns | -79,981.7 (2.8) | 8,695.62 (3.4) | IT | 100 |
84mKr | 83.9115067 (30) |
| 1.89 | us | -82,431.0 (2.8) | 8,717.35 (3.3) | IT | 100 |
85mKr | 84.9125273 (21) |
| 4.48 | h | -81,480.3 (1.9) | 8,698.56 (2.3) | B- | 78.6 4 |
79m1Kr | 78.9200824 (42) |
| 78.7 | ns | -74,442.7 (3.9) | 8,657.12 (4.9) | IT | 100 |
83m1Kr | 82.9141361 (30) |
| 1.83 | h | -79,981.7 (2.8) | 8,695.62 (3.4) | IT | 100 |
85m1Kr | 84.9125273 (21) |
| 1.6 | us | -81,480.3 (1.9) | 8,698.56 (2.3) | IT | 100 |
Data Source: ENSDF March 2005
©Radiochemistry Society 2005