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- Negative electron affinity (NEA) photocathode has been developed rapidly and used widely in the short several decades after it had been found because of its excellent performance. 负电子亲和势(NEA)光电阴极,由于其优异的性能,在发现后短短数十年中获得了迅猛发展和广泛应用。
- The atom is made up of a nucleus with negative electrons revolving around it. 原子是由原子核和绕核旋转的若干负电子组成。
- NEA (Negative electron affinity)photocathodes are prepared by evaporation techniques. Two possibilities are discussed in the article: A) to improve the technological standard of existing and prepare NEA photoca-thodes. 用蒸发法制备负电子亲和势(NEA)光电阴极,探讨了两个可能性:(一)改进现有多碱阴极的工艺规范,制备负电子亲和势光电阴极。
- It is helpful to imagine a metal crystal composed of positive ion cores, atoms without their valence electron, about which the negative electrons circulate. 这有助于(我们)这样想象:一种金属晶体由一些正离子核(失去价电子的原子)和在这些正离子核附近流动的负电子组成。
- negative electron affinity photoemitter 负电子亲和力光电发射体
- negative electron affinity photocathode 负电子亲和势光阴极
- We have shown that it is possible to create a radioactivity characterized by the emission of positive or negative electrons in boron and magnesium, by bombardment with alpha rays. 我们已经展示了人工放射现象的可能性,这种放射现象的特征是用以射线轰击用咄硼和镁中的正电子或负电子。
- negative electron affinity image intensifier 负电子亲和势像增强器
- We have shown that it is possible to create a radioactivity characterized by the emission of positive or negative electrons in boron and magnesium,by bombardment with alpha rays. 我们已经展示了人工放射现象的可能性,这种放射现象的特征是用以射线轰击用咄硼和镁中的正电子或负电子。
- GaN Based Negative Electron Affinity Photocathode 负电子亲和势氮化镓光电阴极
- negative electron coincidence effect emitter 负电子亲合效应发射体
- Since negative electron affinity (NEA), which enables electrons to escape from the surface easily, has been detected on the surface of AlN thin films, AlN should be a good electron emitting material. 并且AlN作为一种宽带隙材料,它有很多独特的性质,已经证明其具有表面负电子亲和势(NEA),能够使电子易于逸出表面,是很好的电子场发射材料。
- negative electron affinity material 负电子亲缘材料
- negative electron affinity (NEA) 负电子亲和势
- The answer to my request was in the negative. 对我的请求的答复是否定的。
- 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
- His answer to my request was a negative. 我的请求遭到了他的拒绝。
- The tests for hepatitis were negative. 肝炎检查结果是阴性。
- Their criticism was not negative. 他们的批评并不是负面的。
- The transmitter was pulsed by an electron tube. 电子管使发射器产生脉冲波。