μ原子超精细结构的拉比振荡光谱
Rabi-Oscillation Spectroscopy of the Hyperfine Structure of Muonium Atoms
摘要：
拉比振荡光谱法是一种新的测定共振频率的方法。与绘制共振曲线的传统光谱相比，拉比振荡光谱拟合拉比振荡的时间演化。通过选择最佳的频率，它表明，精度是两倍的传统光谱与扫频。此外，不同条件下的数据可以统一处理，从而可以更有效地测量由加速器产生的有限数量的短寿命粒子（如μ子）组成的系统。我们已经开发了一个拟合函数，考虑到μ素的空间分布和微波强度的空间分布适用于新的方法，基态μ素超精细结构测量在零场。将其应用于实际测量数据，并在各种条件下确定谐振频率。我们的分析结果给出了$ν_{\rm HFS}=4\ 463\ 301.61 \pm 0.71\ {\rm kHz}$，这是世界上零场条件下最高的精度。
英文摘要：
As a new method to determine the resonance frequency, Rabi-oscillation spectroscopy has been developed. In contrast to the conventional spectroscopy which draws the resonance curve, Rabi-oscillation spectroscopy fits the time evolution of the Rabi oscillation. By selecting the optimized frequency, it is shown that the precision is twice as good as the conventional spectroscopy with a frequency sweep. Furthermore, the data under different conditions can be treated in a unified manner, allowing more efficient measurements for systems consisting of a limited number of short-lived particles produced by accelerators such as muons. We have developed a fitting function that takes into account the spatial distribution of muonium and the spatial distribution of the microwave intensity to apply the new method to ground-state muonium hyperfine structure measurements at zero field. This was applied to the actual measurement data and the resonance frequencies were determined under various conditions. The result of our analysis gives $ν_{\rm HFS}=4\ 463\ 301.61 \pm 0.71\ {\rm kHz}$, which is the world's highest precision under zero field conditions.
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