轻质子高精度质量测量的进展

Atoms Pub Date : 2024-01-26 DOI:10.3390/atoms12020008
Edmund G. Myers
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引用次数: 0

摘要

在过去五年里,潘宁陷阱对质子、氘核、三子、氦核和阿尔法粒子的原子质量和质量比的测量取得了重大进展。其中包括测量了氘核与 12C 的质量比,其不确定性为 8.5 × 10-12 的分数不确定性;解析了 H2+ 的振动级质量,并对 H2+/D+ 回旋频率比应用了同步测量技术,得出了 5 × 10-12 的氘核/质子质量比;对 HD+/3He+、HD+/T+ 和 T+/3He+ 进行新的测量,得出氚的β-衰变 Q 值(不确定度为 22 meV)以及氦子和氚的原子质量(13 × 10-12);以及对 12C 的α粒子质量(12 × 10-12)进行新的测量。其中一些结果与以前文献中的数值有很大出入。此外,还讨论了这些结果对从 HD+ 分子离子的光谱中确定精确的质子/电子质量比和电子原子质量的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Progress in High-Precision Mass Measurements of Light Ions
Significant advances in Penning trap measurements of atomic masses and mass ratios of the proton, deuteron, triton, helion, and alpha-particle have occurred in the last five years. These include a measurement of the mass of the deuteron against 12C with 8.5 × 10−12 fractional uncertainty; resolution of vibrational levels of H2+ as mass and the application of a simultaneous measurement technique to the H2+/D+ cyclotron frequency ratio, yielding a deuteron/proton mass ratio at 5 × 10−12; new measurements of HD+/3He+, HD+/T+, and T+/3He+ leading to a tritium beta-decay Q-value with an uncertainty of 22 meV, and atomic masses of the helion and triton at 13 × 10−12; and a new measurement of the mass of the alpha-particle against 12C at 12 × 10−12. Some of these results are in strong disagreement with previous values in the literature. Their impact in determining a precise proton/electron mass ratio and electron atomic mass from spectroscopy of the HD+ molecular ion is also discussed.
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