4π相关论文
In this article, a Bi4π counting method comprised of Bi4πcounter and a new fundamental measurement method was describe......
<正> 比活性测量常用η~2/n_b表示装置优化程度。由于优化度与探测效率的平方成正比,因此提高探测效率的意义十分明显。介绍了将样......