宇宙核钟

Cosmic Nuclear Clock

摘要: 以很长半衰期 ( 4 2× 1 0⁹a)的 β-衰变的¹⁸⁷Re-¹⁸⁷Os核对作为大尺度的宇宙核钟来量度宇宙的年纪 ,是近代天文学与核物理学相结合的又一典范 .这种宇宙时钟是利用裸核¹⁸⁷Re与它的衰变子体¹⁸⁷Os同位素在共生矿中天然含量的比值来测定时间的 .利用¹⁸⁷Re裸核的半衰期通过核物理计算可对中性 187Re的半衰期进行修定.To the great scale of the universe age, 187 Re- 187 Os isotopic pair, which have very long half life, was used as a cosmic nuclear clock of cosmochronometr. It is a typical relationship between modern astronomy and nuclear physics. The neutral isotope abundance ratio of 187 Re over daughter nucleus 187 Os in common growth mineral can be used as the clock to measure the time. After the 75 electrons in all shells of 187 Re were stripped ...

Abstract: To the great scale of the universe age, 187 Re- 187 Os isotopic pair, which have very long half life, was used as a cosmic nuclear clock of cosmochronometr. It is a typical relationship between modern astronomy and nuclear physics. The neutral isotope abundance ratio of 187 Re over daughter nucleus 187 Os in common growth mineral can be used as the clock to measure the time. After the 75 electrons in all shells of 187 Re were stripped ...