“fountain clock”的概念、定义、翻译、参考文献-科学参考

单词	fountain clock
释义	fountain clock Encyclopedia 工学频率标准释 fountain clock喷泉钟通过激光冷却技术制备冷原子团，然后利用激光频率的特定变化把原子团上抛，由于重力作用，原子团到达顶点之后自由下落形成原子喷泉，在冷原子上升下落过程中将微波频率锁定到原子基态超精细能级跃迁的频率上，从而得到钟跃迁频率的原子钟。又称冷原子喷泉钟。 Astronomy fountain clock喷泉钟
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