利用精密锂离子光谱学直接提取核结构信息
Direct Extraction of Nuclear Structure Information Using Precision Lithium-Ion Spectroscopy
AI总结：
本研究通过 $10$~kHz 量级的精密锂离子光谱学测量，直接提取了 Zemach 半径和电四极矩等核结构参数，发现其与理论及分子光谱存在显著偏差，并通过独立计算验证了结果，为核力表征和核结构理论测试提供了重要基准。
摘要：
准确描述原子核内的核相互作用仍然是一个挑战，这阻碍了我们对标准模型之外新物理的探索。然而，这些核相互作用可以通过 Zemach 半径和电四极矩等核参数来表征，这些参数反映在原子光谱中。我们的工作实现了 $10$~kHz 量级的锂离子超精细分裂的高精度测量，并直接提取了这些重要的核结构参数。我们观察到，我们的结果与核理论和分子光谱在电四极矩方面存在显著差异。$^7$Li 的结果与目前推荐值偏离了 $2.3σ$，而 $^6$Li 的结果与分子光谱确定的推荐值偏离高达 $6.2σ$。这些差异促使我们基于核结构理论进行了独立计算，为离子光谱学获得的结果提供了支持。我们的结果为表征核力提供了有价值的信息，作为测试核结构理论的灵敏基准，并能够与电子-核散射和分子光谱进行关键比较。
英文摘要：
Accurately describing nuclear interactions within atomic nuclei remains a challenge, which hinders our exploration of new physics beyond the Standard Model. However, these nuclear interactions can be characterized by nuclear parameters such as the Zemach radius and the electric quadrupole moment, which are reflected in atomic spectra. Our work has achieved high-precision measurements of lithium ion hyperfine splittings at the level of $10$~kHz, and directly extracted these important nuclear structure parameters. We observed significant discrepancies between our results and both nuclear theory and molecular spectra regarding the electric quadrupole moment. The result for $^7$Li deviated by $2.3σ$ from the currently recommended value, whereas the result for $^6$Li deviated by up to $6.2σ$ from the recommended value determined by molecular spectroscopy. These discrepancies motivated us to conduct independent calculations based on nuclear structure theory, which provided support for the results obtained from ion spectroscopy. Our results provide valuable information for characterizing nuclear forces, serve as sensitive benchmarks for testing nuclear structure theories, and enable critical comparisons with both electron-nuclear scattering and molecular spectroscopy.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
