Table
| nuclide symbol |
Z(p) | N(n) | isotopic mass (u) |
half-life | decay mode(s) |
daughter isotope(s) |
nuclear spin |
representative isotopic composition (mole fraction) |
range of natural variation (mole fraction) |
|---|---|---|---|---|---|---|---|---|---|
| excitation energy | |||||||||
| 69Kr | 36 | 33 | 68.96518(43)# | 32(10) ms | β+ | 69Br | 5/2-# | ||
| 70Kr | 36 | 34 | 69.95526(41)# | 52(17) ms | β+ | 70Br | 0+ | ||
| 71Kr | 36 | 35 | 70.94963(70) | 100(3) ms | β+ (94.8%) | 71Br | (5/2)- | ||
| β+, p (5.2%) | 70Se | ||||||||
| 72Kr | 36 | 36 | 71.942092(9) | 17.16(18) s | β+ | 72Br | 0+ | ||
| 73Kr | 36 | 37 | 72.939289(7) | 28.6(6) s | β+ (99.32%) | 73Br | 3/2- | ||
| β+, p (.68%) | 72Se | ||||||||
| 73mKr | 433.66(12) keV | 107(10) ns | (9/2+) | ||||||
| 74Kr | 36 | 38 | 73.9330844(22) | 11.50(11) min | β+ | 74Br | 0+ | ||
| 75Kr | 36 | 39 | 74.930946(9) | 4.29(17) min | β+ | 75Br | 5/2+ | ||
| 76Kr | 36 | 40 | 75.925910(4) | 14.8(1) h | β+ | 76Br | 0+ | ||
| 77Kr | 36 | 41 | 76.9246700(21) | 74.4(6) min | β+ | 77Br | 5/2+ | ||
| 78Kr | 36 | 42 | 77.9203648(12) | Observationally Stable | 0+ | 0.00355(3) | |||
| 79Kr | 36 | 43 | 78.920082(4) | 35.04(10) h | β+ | 79Br | 1/2- | ||
| 79mKr | 129.77(5) keV | 50(3) s | 7/2+ | ||||||
| 80Kr | 36 | 44 | 79.9163790(16) | Stable | 0+ | 0.02286(10) | |||
| 81Kr | 36 | 45 | 80.9165920(21) | 2.29(11)×105 a | EC | 81Br | 7/2+ | ||
| 81mKr | 190.62(4) keV | 13.10(3) s | IT (99.975%) | 81Kr | 1/2- | ||||
| EC (.025%) | 81Br | ||||||||
| 82Kr | 36 | 46 | 81.9134836(19) | Stable | 0+ | 0.11593(31) | |||
| 83Kr | 36 | 47 | 82.914136(3) | Stable | 9/2+ | 0.11500(19) | |||
| 83m1Kr | 9.4053(8) keV | 154.4(11) ns | 7/2+ | ||||||
| 83m2Kr | 41.5569(10) keV | 1.83(2) h | IT | 83Kr | 1/2- | ||||
| 84Kr | 36 | 48 | 83.911507(3) | Stable | 0+ | 0.56987(15) | |||
| 84mKr | 3236.02(18) keV | 1.89(4) µs | 8+ | ||||||
| 85Kr | 36 | 49 | 84.9125273(21) | 10.776(3) a | β- | 85Rb | 9/2+ | ||
| 85m1Kr | 304.871(20) keV | 4.480(8) h | β- (78.6%) | 85Rb | 1/2- | ||||
| IT (21.4%) | 85Kr | ||||||||
| 85m2Kr | 1991.8(13) keV | 1.6(7) µs |
(17/2+) | ||||||
| 86Kr | 36 | 50 | 85.91061073(11) | Observationally Stable | 0+ | 0.17279(41) | |||
| 87Kr | 36 | 51 | 86.91335486(29) | 76.3(5) min | β- | 87Rb | 5/2+ | ||
| 88Kr | 36 | 52 | 87.914447(14) | 2.84(3) h | β- | 88Rb | 0+ | ||
| 89Kr | 36 | 53 | 88.91763(6) | 3.15(4) min | β- | 89Rb | 3/2(+#) | ||
| 90Kr | 36 | 54 | 89.919517(20) | 32.32(9) s | β- | 90mRb | 0+ | ||
| 91Kr | 36 | 55 | 90.92345(6) | 8.57(4) s | β- | 91Rb | 5/2(+) | ||
| 92Kr | 36 | 56 | 91.926156(13) | 1.840(8) s | β- (99.96%) | 92Rb | 0+ | ||
| β-, n (.033%) | 91Rb | ||||||||
| 93Kr | 36 | 57 | 92.93127(11) | 1.286(10) s | β- (98.05%) | 93Rb | 1/2+ | ||
| β-, n (1.95%) | 92Rb | ||||||||
| 94Kr | 36 | 58 | 93.93436(32)# | 210(4) ms | β- (94.3%) | 94Rb | 0+ | ||
| β-, n (5.7%) | 93Rb | ||||||||
| 95Kr | 36 | 59 | 94.93984(43)# | 114(3) ms | β- | 95Rb | 1/2(+) | ||
| 96Kr | 36 | 60 | 95.94307(54)# | 80(7) ms | β- | 96Rb | 0+ | ||
| 97Kr | 36 | 61 | 96.94856(54)# | 63(4) ms | β- | 97Rb | 3/2+# | ||
| β-, n | 96Rb | ||||||||
| 98Kr | 36 | 62 | 97.95191(64)# | 46(8) ms | 0+ | ||||
| 99Kr | 36 | 63 | 98.95760(64)# | 40(11) ms | (3/2+)# | ||||
| 100Kr | 36 | 64 | 99.96114(54)# | 10# ms |
0+ | ||||
| 101Kr | 36 | 65 | unknown | >635 ns | β- 2n, β- n, β- | (in order of decay mode) 99Rb, 100Rb, 101Rb | unknown | ||
Read more about this topic: Isotopes Of Krypton
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