 Notable Isotopes
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 82Sr [44 neutrons] |
 Abundance: synthetic
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| Half life: 25.36 days [ Electron Capture ]
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| Decay Energy: ?MeV |
| Decays to 82Rb.
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| 83Sr [45 neutrons] |
| Abundance: synthetic
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| Half life: 1.35 days [ Electron Capture ]
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| Decay Energy: ?MeV |
| Decays to 83Rb.
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| Half life: 1.35 days [ beta+ ]
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| Decay Energy: 1.23MeV |
| Decays to 83Rb.
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| Half life: 1.35 days [ Gamma Radiation ]
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| Decay Energy: 0.76, 0.36MeV |
| Decays to ?.
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| 84Sr [46 neutrons] |
| Abundance: 0.56%
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| Stable with 46 neutrons
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| 85Sr [47 neutrons] |
| Abundance: synthetic
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| Half life: 64.84 days [ Electron Capture ]
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| Decay Energy: ?MeV |
| Decays to 85Rb.
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| Half life: 64.84 days [ Gamma Radiation ]
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| Decay Energy: 0.514DMeV |
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| 86Sr [48 neutrons] |
| Abundance: 9.86%
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| Stable with 48 neutrons
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| 87Sr/86Sr ratios have also been used to determine the source of ancient archaeological materials such as timbers and corn in Chaco
Canyon, New Mexico. 87Sr/86Sr ratios in teeth may also be used to track animal migrations or in criminal forensics.
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| 87Sr [49 neutrons] |
| Abundance: 7.0%
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| Stable with 49 neutrons
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| 87Sr/86Sr ratios have also been used to determine the source of ancient archaeological materials such as timbers and corn in Chaco
Canyon, New Mexico. 87Sr/86Sr ratios in teeth may also be used to track animal migrations or in criminal forensics.
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| 88Sr [50 neutrons] |
| Abundance: 82.58%
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| Stable with 50 neutrons
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| 89Sr [51 neutrons] |
| Abundance: synthetic
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| Half life: 50.52 days [ Electron Capture ]
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| Decay Energy: 1.49MeV |
| Decays to 89Y.
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| Half life: 50.52 days [ beta- ]
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| Decay Energy: 0.909DMeV |
| 89Sr is the active ingredient in Metastron, a radiopharmaceutical used for bone pain secondary to metastatic prostate cancer.
The strontium acts like calcium and is preferentially incorporated into bone at sites of increased osteogenesis. This localization
focuses the radiation exposure on the cancerous lesion.
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| 90Sr [52 neutrons] |
| Abundance: synthetic
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| Half life: 28.90 years [ beta- ]
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| Decay Energy: 0.546MeV |
| Decays to 90Y.
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| 90Sr has been used as a power source for radioisotope thermoelectric generators (RTGs). 90Sr produces about 0.93 watts of heat per gram (it is lower for the grade of 90Sr used in RTGs, which is strontium fluoride). However, 90Sr has a lifetime approximately 3 times shorter and has a lower density than 238Pu, another RTG fuel. The main advantage of 90Sr is that it is cheaper than 238Pu and is found in nuclear waste.
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| 90Sr is also used in cancer therapy. Its beta emission and long half-llife is ideal for superficial radiotherapy.
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