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No.322　13/02/07 22:41
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【What is sievert?】

《Sievert》

Even if the same energy of radiation,while the one gives the human body terrible damage,the other doesn't so bad.😃

For instance,if comparing α rays with β rays,the α is 20th times as harmful as the the β.We call degree of its harm 線質係数😃

We have to multiply amount of energy of the radiation by the 線質係数 in order to measure damage for the human body.It's 線量等量💡

We frequently use the things which are expressed in numbers,線量等量,so as to express damage of the radiation for the human body directly.Its unit is sievert,but it's so long that it's abbreviated as sv.😃

The sv is too big as an unit,so we often use msv which is one thousandth of the sv,or we adopt μSv which is one thousandth of mSv.

As to connections between Sv,mSv,and μSv in number,they are the next ones.

1.000 μSv＝1 mSv

1.000 mSv＝1 Sv

When expressing something heavy,we use g,kg,or ton.Their connection is like the next.

1.000g＝1kg
1.000kg＝1ton

As for the amount of the radiation,we think like that.
😃