Explanations about the notion of « radioactive period »

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Item Description
The radioactive period corresponds to the decrease of a factor 2. At the end of 2 periods, the decrease reaches a factor 4 (half of the half) ; at the end of 3 periods, the activity is divided by 8 (half of the half of half) ; etc.
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jawaii9096@hotmail.co.jp
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English Title
Explanations about the notion of « radioactive period »
English Description
The radioactive period corresponds to the decrease of a factor 2. At the end of 2 periods, the decrease reaches a factor 4 (half of the half) ; at the end of 3 periods, the activity is divided by 8 (half of the half of half) ; etc.
ID at Source
8491
old_tags_text
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http://wayback.archive-it.org/2438/20110301000000/http://www.criirad.org/actualites/dossier2011/japon_bis/en_anglais/radioactive-period.pdf
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http://wayback.archive-it.org/2438/20110301000000/http://www.criirad.org/actualites/dossier2011/japon_bis/en_anglais/radioactive-period.pdf