鍶的同位素
圖表

| 符號 | Z> 激發能量 | N> 激發能量 | 同位素質量（u） > 激發能量 | 半衰期 | 衰變方式 | 衰變產物 | 原子核 自旋 | 相對豐度 （莫耳分率） | 相對豐度 的變化量 （莫耳分率） |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 73 Sr  | 38 | 35 | 72.96597(64)# | >25 ms | β+ (>99.9%) | 73Rb | 1/2-# |  |  |
| 73 Sr  | 38 | 35 | 72.96597(64)# | >25 ms | β+, p (<.1%) | 72Kr | 1/2-# |  |  |
| 74Sr | 38 | 36 | 73.95631(54)# | 50# ms [>1.5 µs] | β+ | 74Rb | 0+ |  |  |
| 75Sr | 38 | 37 | 74.94995(24) | 88(3) ms | β+ (93.5%) | 75Rb | (3/2-) |  |  |
| 75Sr | 38 | 37 | 74.94995(24) | 88(3) ms | β+, p (6.5%) | 74Kr | (3/2-) |  |  |
| 76Sr | 38 | 38 | 75.94177(4) | 7.89(7) s | β+ | 76Rb | 0+ |  |  |
| 77Sr | 38 | 39 | 76.937945(10) | 9.0(2) s | β+ (99.75%) | 77Rb | 5/2+ |  |  |
| 77Sr | 38 | 39 | 76.937945(10) | 9.0(2) s | β+, p (.25%) | 76Kr | 5/2+ |  |  |
| 78Sr | 38 | 40 | 77.932180(8) | 159(8) s | β+ | 78Rb | 0+ |  |  |
| 79Sr | 38 | 41 | 78.929708(9) | 2.25(10) min | β+ | 79Rb | 3/2(-) |  |  |
| 80Sr | 38 | 42 | 79.924521(7) | 106.3(15) min | β+ | 80Rb | 0+ |  |  |
| 81Sr | 38 | 43 | 80.923212(7) | 22.3(4) min | β+ | 81Rb | 1/2- |  |  |
| 82Sr | 38 | 44 | 81.918402(6) | 25.36(3) d | ε | 82Rb | 0+ |  |  |
| 83Sr | 38 | 45 | 82.917557(11) | 32.41(3) h | β+ | 83Rb | 7/2+ |  |  |
| 83mSr | 259.15(9) keV | 259.15(9) keV | 259.15(9) keV | 4.95(12) s | IT | 83Sr | 1/2- |  |  |
| 84Sr | 38 | 46 | 83.913425(3) | 觀測上穩定 | 觀測上穩定 | 觀測上穩定 | 0+ | 0.0056(1) | 0.0055-0.0058 |
| 85Sr | 38 | 47 | 84.912933(3) | 64.853(8) d | ε | 85Rb | 9/2+ |  |  |
| 85mSr | 238.66(6) keV | 238.66(6) keV | 238.66(6) keV | 67.63(4) min | IT (86.6%) | 85Sr | 1/2- |  |  |
| 85mSr | 238.66(6) keV | 238.66(6) keV | 238.66(6) keV | 67.63(4) min | β+ (13.4%) | 85Rb | 1/2- |  |  |
| 86Sr | 38 | 48 | 85.9092607309(91) | 稳定 | 稳定 | 稳定 | 0+ | 0.0986(1) | 0.0975-0.0999 |
| 86mSr | 2955.68(21) keV | 2955.68(21) keV | 2955.68(21) keV | 455(7) ns |  |  | 8+ |  |  |
| 87Sr | 38 | 49 | 86.9088774970(91) | 稳定 | 稳定 | 稳定 | 9/2+ | 0.0700(1) | 0.0694-0.0714 |
| 87mSr | 388.533(3) keV | 388.533(3) keV | 388.533(3) keV | 2.815(12) h | IT (99.7%) | 87Sr | 1/2- |  |  |
| 87mSr | 388.533(3) keV | 388.533(3) keV | 388.533(3) keV | 2.815(12) h | ε (.3%) | 87Rb | 1/2- |  |  |
| 88Sr | 38 | 50 | 87.9056122571(97) | 稳定 | 稳定 | 稳定 | 0+ | 0.8258(1) | 0.8229-0.8275 |
| 89Sr | 38 | 51 | 88.9074507(12) | 50.57(3) d | β− | 89Y | 5/2+ |  |  |
| 90Sr | 38 | 52 | 89.907738(3) | 28.90(3) y | β− | 90Y | 0+ |  |  |
| 91Sr | 38 | 53 | 90.910203(5) | 9.63(5) h | β− | 91Y | 5/2+ |  |  |
| 92Sr | 38 | 54 | 91.911038(4) | 2.66(4) h | β− | 92Y | 0+ |  |  |
| 93Sr | 38 | 55 | 92.914026(8) | 7.423(24) min | β− | 93Y | 5/2+ |  |  |
| 94Sr | 38 | 56 | 93.915361(8) | 75.3(2) s | β− | 94Y | 0+ |  |  |
| 95Sr | 38 | 57 | 94.919359(8) | 23.90(14) s | β− | 95Y | 1/2+ |  |  |
| 96Sr | 38 | 58 | 95.921697(29) | 1.07(1) s | β− | 96Y | 0+ |  |  |
| 97Sr | 38 | 59 | 96.926153(21) | 429(5) ms | β− (99.95%) | 97Y | 1/2+ |  |  |
| 97Sr | 38 | 59 | 96.926153(21) | 429(5) ms | β−, n (.05%) | 96Y | 1/2+ |  |  |
| 97m1Sr | 308.13(11) keV | 308.13(11) keV | 308.13(11) keV | 170(10) ns |  |  | (7/2)+ |  |  |
| 97m2Sr | 830.8(2) keV | 830.8(2) keV | 830.8(2) keV | 255(10) ns |  |  | (11/2-)# |  |  |
| 98Sr | 38 | 60 | 97.928453(28) | 0.653(2) s | β− (99.75%) | 98Y | 0+ |  |  |
| 98Sr | 38 | 60 | 97.928453(28) | 0.653(2) s | β−, n (.25%) | 97Y | 0+ |  |  |
| 99Sr | 38 | 61 | 98.93324(9) | 0.269(1) s | β− (99.9%) | 99Y | 3/2+ |  |  |
| 99Sr | 38 | 61 | 98.93324(9) | 0.269(1) s | β−, n (.1%) | 98Y | 3/2+ |  |  |
| 100Sr | 38 | 62 | 99.93535(14) | 202(3) ms | β− (99.02%) | 100Y | 0+ |  |  |
| 100Sr | 38 | 62 | 99.93535(14) | 202(3) ms | β−, n (.98%) | 99Y | 0+ |  |  |
| 101Sr | 38 | 63 | 100.94052(13) | 118(3) ms | β− (97.63%) | 101Y | (5/2-) |  |  |
| 101Sr | 38 | 63 | 100.94052(13) | 118(3) ms | β−, n (2.37%) | 100Y | (5/2-) |  |  |
| 102Sr | 38 | 64 | 101.94302(12) | 69(6) ms | β− (94.5%) | 102Y | 0+ |  |  |
| 102Sr | 38 | 64 | 101.94302(12) | 69(6) ms | β−, n (5.5%) | 101Y | 0+ |  |  |
| 103Sr | 38 | 65 | 102.94895(54)# | 50# ms [>300 ns] | β− | 103Y |  |  |  |
| 104Sr | 38 | 66 | 103.95233(75)# | 30# ms [>300 ns] | β− | 104Y | 0+ |  |  |
| 105Sr | 38 | 67 | 104.95858(75)# | 20# ms [>300 ns] |  |  |  |  |  |
1 2 3  畫上#號的數據代表沒有經過實驗的証明，僅為理論推測。
1 2 3 4  用括號括起來的數據代表不確定性。
↑  穩定的衰變產物以粗體表示。
↑  半衰期超过5亿年的衰变产物以粗斜体表示。
↑  Believed to decay by β+β+ to 84Kr
↑  Used in rubidium-strontium dating
1 2 3  Fission product
| 0 | 1 | 2 |
| --- | --- | --- |

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