注目の話題: 離婚し30年会ってない父親に会う場合; どっちの妻がいい？; 海外の人に原爆について教える。

Let's enjoy English!

No.430　13/05/06 02:05
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【Let's measure an age with the half-life】

A way of the most peaceful use for the reaction of atomic nucleus is an atomic reactor.Roughly speaking,one-third of all amount of Japanese generation of electricity is nuclear electric power generation.😃

Some reactions of atomic nucleus such as X-ray,or medical treatment of radiation in the medical field are remarkable😃

By the way,I'm going to express a principle on measurement of an age from now on.😃

《Half-life of carbon of which amount of mass is 14》

Let's suppose that we discovered a wooden sculpture in some remains.It seems the artifact 出土品 was carved hundreds of years ago.😚

Measurement of an age measures time when the artifact was carved.Then we make use of an isotope of carbon of which amount of mass is 14.I call it 14C here for the sake of convenience 便宜上😺

The 14C is radioactive,and generates β-ray.It changes into nitrogen.It's said the half-life of the 14C is 5730 years.☝