| 单词 | rubidium-strontium dating |
| 释义 | rubidium-strontium dating A method of dating geological specimens based on the decay of the radioisotope rubidium-87 into the stable isotope strontium-87. Natural rubidium contains 27.85% of rubidium-87, which has a half-life of 4.7 × 1010 years. The ratio 87Rb/87 Sr in a specimen gives an estimate of its age (up to several thousand million years) |
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