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Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
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质谱 230Th-234U-238U 魔鬼洞的约会石静脉

K R Ludwig, K R Simmons, B J Szabo

    Science (New York, N.Y.)
    |October 9, 1992
    PubMed
    概括

    使用系列 (U系列) 年龄测定魔鬼洞石灰岩脉的精确约会提供了可靠的气候记录. 这项研究为解释过去的气候变化建立了精确的时间表.

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    Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay simultaneously. The number of disintegrations per unit time is called the activity (A), which is directly proportional to the number of nuclei in the sample. The decay constant (λ) is an average probability of decay per nucleus in unit time.