产物

在原子核物理学中，衰变产物(也称至子同位素)是一个元素经过辐射衰变后剩下来的核素。辐射衰变通常涉及很多过程(衰变链)。例如，铀238(U-238)衰变至钍234(Th-234)，钍234(Th-234)再衰变成镤234(Pa-234)，而镤234(Pa-234)再衰变成…，再衰变成铅206(Pb-206)（稳定）:U-238 → Th-234 ⏟ daughter of U-238 → Pa-234m ⏟ granddaughter of U-238 → … → Pb-206 ⏞ decay products of U-238 {displaystyle {mbox{U-238}}rightarrow overbrace {underbrace {mbox{Th-234}} _{mbox{daughter of U-238}}rightarrow underbrace {mbox{Pa-234m}} _{mbox{granddaughter of U-238}}rightarrow ldots rightarrow {mbox{Pb-206}}} ^{begin{array}{c}{mbox{decay products of U-238}}end{array}}}v {displaystyle v}在这例子中，These might also be referred to as the daughter products of U-238.