注目の話題: 海外の人に原爆について教える。; 独身、恋愛経験なし。これから何を目標に生きたらいいか？; 離婚し30年会ってない父親に会う場合

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No.246　12/11/24 19:22
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【Various half-value periods》

In general,as to the half-value periods,it's useful when recognizing speeds of reactions.In short,while a long half-value period means its reaction is fast,long one does its reaction is slow.😃

As for the half-value periods of reactions of the atomic nucleus,they are varied.The shortest one is one ten thousandth second,and the longest one is millions of years.😃

Some of transuranic elements are so unstable that when it's created itchanges into other element at once.😃

【Measurement an era with a half-value period】

Use of reaction of atomic nucleus the most peacefully is an atomic reactor.Roughly speaking,one third of all the amount of generation of electricity is nuclear electric power generation.😃

We make use of the reaction of the atomic nucleus for medical fields such as an X ray or medical treatment with radiations.😃

However what I try to express is a principle of era measurement which measures a historical remains with the half-value period of atomic nucleus.🙋