Physics
Undergraduate
求め方を教えて頂きたいです。よろしくお願いいたします。
2. Cs-137の壊変図を示す。1MBq の137Csが一ー秒間に放出する光子数に近いのはどれか。
137CS
94.4%
137mBa
5.6%
B
Y|661.7
137Ba
1. 1.0x106
2.
3.7x 106
3.
1.0X105
4.
2.0x106
5.
1.5x105
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