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在湖泊沉积物上的观测使用沉降137Cs作为标记物

W Pennington, R S Cambray, E M Fisher

    Nature
    |March 30, 1973
    PubMed
    概括

    No abstract available in PubMed .

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    Radioactive Decay and Radiometric Dating02:48

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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.
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