positron annihilation

基本解释

The software and hardware construction for an on-line positron annihilation lifetime spectrometer and the prime process of setting it have been described.
本文着重介绍实现正电子湮没寿命谱仪计算机在线的软、硬件的构成及建立的主要过程。
In crack-bud stage the inferior process of material is described the positron annihilation average life acts as damage parameter by Positron Annihilation Technique(PAT).
利用正电子湮没技术，以正电子湮没平均寿命为损伤参量，描述裂纹萌生阶段材料的劣化过程。