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Different units of radioactivity

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Different units of radioactivity

    • Posted by Vishal Budania 6 years, 1 month ago

    CBSE > Class 12 > Physics
    • 1 answers

    Yogita Ingle 6 years, 1 month ago

    The SI unit of radioactivity is becquerel (Bq) and this term has been kept after Henri Becquerel. It is defined as:

    The activity of a quantity of radioactive material where one decay takes place per second

    1 becquerel = 1 radioactive decay per second = 2.703×10-11

    An older radioactivity unit is the curie (Ci) and the name has been taken from Pierre and Marie Curie.

    • It is defined as that quantity of any radioactive substance which gives 3.7 X 1010s-1 disintegration (dps).
    • Sometimes millicurie (mc) and microcurie (mc) are also used.

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