neutron activation technique

例句：

1. 1. The neutron activation technique is used to determine the composition of materials.
   中子活化技术用于确定材料的成分。
2. 2. This method is widely used in the field of nuclear physics.
   这种方法在核物理学领域得到了广泛应用。
3. 3. The neutron activation technique has been proven to be highly accurate in mineral analysis.
   中子活化技术在矿物分析中已被证明高度准确。