Units of Radioactivity

Units of Radioactivity

 The standard unit in radioactivity is curie (c) which is defined as that amount of any radioactive material which gives  disintegration’s per second (dps), i.e.,1c = Activity of 1g of 

The millicurie (mc) and microcurie (mc) are equal to  and  curies i.e.  and dps respectively.

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But now a day, the unit curie is replaced by rutherford (rd) which is defined as the amount of a radioactive substance which undergoes  i.e., . The millicurie and microcurie correspondingly rutherford units are millirutherford (mrd) and microrutherford (mrd) respectively.

However, in SI system the unit of radioactivity is Becquerel (Bq)

1 Bq = 1 disintegration per second = 1 dps = 1mrd, , 

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