1 . 医学治疗中常用放射性核素
产生
射线,而
是由半衰期相对较长的
衰变产生的.对于质量为
的
,经过时间t后剩余的
质量为m,
是以t为自变量的指数函数,其部分图象如图.从图中可以得到
的半衰期为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deeae77dc16c05635531ee5278863937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deeae77dc16c05635531ee5278863937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e873307741f49ed377eb13fe9b07cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e93d8fb77f5bd2c0fc690752dfd771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e873307741f49ed377eb13fe9b07cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e873307741f49ed377eb13fe9b07cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603622cd2407af65b7c40f9d1713f8ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e873307741f49ed377eb13fe9b07cb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/0926b8c0-eda9-44f0-8b71-9e26588a2396.png?resizew=169)
A.67.3d | B.101.0d | C.115.1d | D.124.9d |
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A.67.3d | B.101.0d | C.115.1d | D.124.9d |