positron annihilation life time spectrum

• 正电子湮没

positron annihilation life time spectrum的用法和样例：

例句

1. The vacancy defects of samples were measured by slow positron annihilation.
   借助慢正电子湮没技术研究了样品的空位型缺陷。
2. The PAT experiments showed that the mean life and vacancy defects increased with the increasing anodization time.
   正电子湮没实验表明，随着阳极氧化时间的延长，平均寿命值增大，空位缺陷增多。