工業上用的放射性同位素大多是從原子堆裏制造出來的。一般是把預備作成放射性同位素的元素,放在小的鋁罐内蓋好,然後放入原子堆上特別安置的石墨磚的孔内(圖1)。每個石墨磚上有很多孔,可以装進很多的小鋁 Most of the radioactive isotopes used in industry are manufactured from atomic reactors. The elements that are prepared as radioactive isotopes are generally placed in small aluminum cans and then placed in the holes of specially placed graphite bricks on the atomic stack (Figure 1). Each graphite brick has a lot of holes that can hold a lot of small aluminum