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引言高精密射频或微波谱线的观测试验,大多数都具有以下特点或其一:1.对共振进行相当长时间的观察,以获得窄共振线;2.对尽可能纯的谱线进行观察,以免由于谱线的不同分量或有关原子(分子)的周围环境引起谱线展宽;3.所用方法能消除或尽可能减小一次多普勒频移;4.所用装置能产生低噪声放大提供的良好讯噪比,这是脉泽振荡器所具有的特征。虽然大多数高精密射频和微波实验的成败都取决于上述特性,但过去没有一种实验方法能使所有各项特性都达到高质量。原子束超精细共振实验在谱线纯度方面很好,但原子的寿命只有中等长度。原来的氨脉泽讯噪比很好,但只有很短的寿命,且谱线复杂。
Introduction Most observations of high-precision RF or microwave lines have one or more of the following features: 1. Observe resonances for a relatively long period of time to obtain narrow resonance lines; 2. Observe as pure lines as possible In order to avoid spectrum broadening caused by different components of the spectral line or the surrounding environment of the relevant atom (molecule); 3. The method used can eliminate or minimize a Doppler shift as much as possible; 4. The device used can produce low noise amplification The good signal to noise ratio, which is the characteristics of the pulse oscillator. Although the success or failure of most high-precision RF and microwave experiments depends on the above characteristics, none of the experimental methods used in the past has resulted in the highest quality of all the features. Atomic beam super-fine resonance experiments are good at spectral purity, but the lifetime of atoms is only moderately long. The original ammonia pulse Ze noise ratio is good, but only a very short life expectancy, and spectral complexity.