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定義
SIの放射能の単位で、毎秒1回の原子核崩壊に等しい（1 Bq = 1 s⁻¹）。
解説
Named after Henri Becquerel, who discovered radioactivity in 1896. The human body contains about 8,000 Bq of radioactivity from potassium-40 and carbon-14. The older unit curie (Ci) equals 3.7×10¹⁰ Bq. Fukushima reactor cores at peak released roughly 10¹⁸ Bq (1 exabecquerel). Safe drinking water limits are typically set at a few Bq/L.
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