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1.1?????(activity, A). ??:??????????(dt)? ????????(dN) . A=dN/dt. ??: SI: Becquerel(Bq) 1Bq=1s-1 ????:?? 1Ci=3.71010Bq 1mCi=10-3Ci=3.7 107Bq 1Ci= 10-3mCi=10-6Ci. . ??????:. ??:????????????? ?????????: Bq/kg;

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    1. «????» ?2? ????????????? ???????????? (International Commission on Radiation Units and Measurements, ICRU) 1975? ???????(SI) 1984? ?????????????

    2. 1.1?????(activity, A) ??:??????????(dt)? ????????(dN)

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