原子喷泉中回落信号原子数损失的估计  

A Loss Estimation for Dropping-back Atom Number in the Atomic Fountain

作　　者：黄秉英[1] 干云清[1] 

机构地区：[1]中国计量科学研究院,北京100013

出　　处：《现代计量测试》2001年第1期53-55,59,共4页Modern Measurement and Test

摘　　要：本文以新的角度 ,考虑到信号原子速度远少于本底气体分子 (原子 )热运动速度的实际情形 ,给出原子喷泉中回落信号原子因碰撞散射和原子云扩大所致损失的估计方法 ,并以我们设计的原子喷泉有关数据为例进行具体估算 ,给出量化概念。该方法曾应用于国外原子喷泉 ,其理论预期与实验结果相当符合。The author proposed a loss estimation method for dropping back atom number in the atomic fountain from a new point of view and considering the practical situation in which the velocity of signal atoms are much slower than the background gas atoms. As a numerical example we have done a calculation substituted in our fountain parameters. The estimation method has been also used to other fountain worked in foreign country and got quite agreement with their experimental results.

关 键 词：原子喷泉 原子云 碰撞散射 高斯分布 频率基准 回落信号 原子数损失 估算 

分 类 号：TL99[核科学技术—核技术及应用]