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becquerel (Bq)
The derived unit of activity (of a radionuclide) in the SI system of units. The unit is named after the French physicist Henri Becquerel (1852-1908). One becquerel (Bq) is defined as one disintegration per second. Often, in practice, kBq (= 1,000 Bq) and MBq (= 1,000,000 Bq) are used. The becquerel has replaced the formerly used unit, the curie.
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