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- positron electron annihilation 偶湮没
- To participate in annihilation, as do an electron and a positron. 湮灭，湮没湮灭，如电子与正电子
- Positron Electron Tandem Ring Accelerator 正电子电子前后环状加速器
- To participate in annihilation,as do an electron and a positron. 湮灭，湮没湮灭，如电子与正电子
- An electron with a negative charge, as contrasted with a positron. 电子带有负电荷，与正电荷相反的电子
- In this report, the porous silicon formed by anodization of crystal silicon was studied by positron annihilation technique (PAT) and scanning electron microscopy (SEM). 用正电子湮没技术和扫描电子显微镜研究了阳极氧化法制备的多孔硅材料。
- Another hint dates to the early 1970s, when astronomers detected vast numbers of electrons annihilating with positrons. 另一个迹象则要回溯到1970年代早期，科学家侦测到电子与正子的湮灭反应。
- 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。
- The brave sailor saved the fishing boat from annihilation. 这个勇敢的水手拯救渔船免於毁灭之灾。
- A full-scale nuclear war could lead to the annihilation of the human race. 全面的核子战争能导致人类的灭绝。
- The transmitter was pulsed by an electron tube. 电子管使发射器产生脉冲波。
- An electron with a negative charge,as contrasted with a positron. 电子带有负电荷，与正电荷相反的电子
- This creates, as it were, electron and positron shadows. 这样也就有了电子和正电子的阴影。
- An electron tube having a cathode and an anode. 电子二极管有一个阳极和一个阴极的电子管
- Abstract: Magnetized water samples were measured by the positron annihilation lifetime spectrometer. 文摘:用正电子湮没寿命谱仪对经过磁场处理的水样品进行了对照测量。
- The applications of positron annihilation technique in the research of some metal-functional materials are introduced. 本文介绍了正电子湮没方法在若干金属功能材料研究中的一些应用。
- electron annihilation 电子湮灭
- Positron is how it was detected by ? 正电子是如何被检测出来的呢？
- By means of positron annihilation lifetime spectra (PALS), the free volume of polymer could be tested. 通过正电子湮没寿命谱技术(PALS)探测聚合物的自由体积特性,能够了解聚合物的微观性质。
- The number of electron pairs an atom can share with other atoms. 共用电子对数，共价一个原子与其他原子共用的电子的对数
