Abstract The absolute mass value of 168Yb has been directly determined with the JYFLTRAP Penning trap mass spectrometer at the Ion Guide Isotope Separator On-Line (IGISOL) facility. A more precise value of the mass of 168Yb is needed to extract possible signatures of beyond standard model physics from high-precision isotope shift measurements of Yb atomic transition frequencies. The measured mass-excess value, M E (168Yb) = − 61579.846(94) keV, is 13 times more precise and deviates from the Atomic Mass Evaluation 2016 value by 1.7σ. The impact on precision isotope shift studies of the stable Yb isotopes is discussed.

中文翻译：

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用于验证非线性同位素位移的 168Yb 的高精度质量测量

摘要 168Yb 的绝对质量值已在离子引导同位素分离器在线 (IGISOL) 设施上使用 JYFLTRAP Penning 阱质谱仪直接测定。需要更精确的 168Yb 质量值，才能从 Yb 原子跃迁频率的高精度同位素位移测量中提取超出标准模型物理学的可能特征。测得的质量过剩值 ME (168Yb) = − 61579.846(94) keV，精度提高了 13 倍，与原子质量评估 2016 值相差 1.7σ。讨论了稳定 Yb 同位素对精密同位素位移研究的影响。