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- Keywords Pr3+ ion;photon cascade emission;VUV excitation;low temperature spectra; 三价镨离子;光子级联发射;真空紫外激发;低温光谱;
- photon cascade emission 光子级联发射
- SPECT: Single Photon Emission Computer Tomgraphy. 单光子发射计算机断层扫描仪。
- The water formed a cascade down the mountain. 水沿山泻下，形成一条瀑布。
- The emission of visible light by a hot object. 白热光物体遇热发出可见光
- The amount or rate of emission or ejection. 排放量流量、流速，或排出量，排出的速度
- cascade emission 级联发射
- Her hair fell over her shoulders in a cascade of curls. 她的一头卷发一直披到双肩上。
- When it rained, water would cascade down the window. 下雨的时候，雨水像瀑布一样沿着窗沿泻下。
- The fireworks went off in a cascade of colour. 烟火散开来象一片五彩缤纷的瀑布。
- The quantum of light is called a photon. 光的量子就称为光子。
- The firework went off in a cascade of colour. 烟火散开像一片五彩缤纷的瀑布。
- A cascade of blood spouted from the hole. 伤口不断冒血。
- Emission and propagation of energy in the form of rays or waves. 发射以光线或波的形式发出和传播能量
- Can the photon be treated as a frame of reference? 光子能否作参考系呢?
- Her long hair fell over her shoulders in a cascade of curls. 她长长的卷发像瀑布一样披泻在肩上。
- Single Photon Medical Lineal Accelerator,1set. 单光子医用直线加速器,1台。
- They are permanent as a photon is not. 它们是永恒的，而光子则不然。
- One set of provisions tightens emission standards. 一套使排放标准更加严格的规定。
- A steep descent of water from a height; a cascade. 瀑布水从一定高度上陡然而下；瀑布
