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1)  cosmogenic nuclide
宇宙源核种
2)  Cosmogenic nuclide
宇宙核素
1.
<Abstrcat>Cosmogenic nuclide techniques have been used widely in various Earth science areas to measure surface exposure ages,burial events,and to reveal the style and rates of landscape evolution processes across a wide range of spatial and temporal scales.
宇宙核素技术已广泛应用于地学研究的诸多领域,用来直接获取地质、地貌体的暴露年龄或埋藏时代,揭示本地、小流域、大区域范围的地表过程演化特点和速率。
2.
<Abstrcat>Cosmogenic nuclides found in rocks and sediments at the Earth s surface are produced primarily by three forms of interaction between cosmic rays and minerals: spallation,neutron-capture reactions and muon-induced reactions.
宇宙核素是宇宙射线与地表物质相互作用的产物,具有蜕变、中子捕获和介子反应三种形成机制。
3)  cosmic nuclear clock
宇宙核钟
1.
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.
以很长半衰期 ( 4 2× 1 0 9a)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 。
4)  the Origin of the Universe
宇宙起源
1.
In the pre-Buddhist time, China had developed a theory concerning the origin of the universe of her own, which was a similar counterpart to Kant’s “view of nebula” with respect to the origin of the solar system in modern times but not exactly the same.
佛教传入之前 ,中国古代有一种关于宇宙起源的学说 ,此说与近代康德等太阳系起源“星云说”相似而不完全相同。
5)  cosmic-ray source
宇宙线源
6)  nuclear cosmochemistry
核宇宙化学
补充资料:宇宙成因放射性核素
分子式:
CAS号:

性质:由宇宙线作用而产生的放射性核素,主要有10Be,14C,26A1,36Cl,53Mn,129I等长寿命放射性核素,还有不少短寿命放射性核素,例如3H,7Be,22Na,48V,60Co等。在陨石学、天体化学、冰川学、海洋学、环境学等研究中有重要意义。

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