论文标题
带有EV/C2的精度水平的重核质量测量值，五角形
Mass-difference measurements on heavy nuclides with at an eV/c2 accuracy level with PENTATRAP
论文作者
论文摘要
提出了有史以来对Z> 50的重型高度电荷离子的自由回旋频率比率的首先测量，其相对不确定性接近1E-11。由于构建了新型低温多型陷阱质谱仪五角体，因此这种准确的测量已变得现实。基于测得的频率比，已经确定了五对稳定异位同位素的质量差异，范围从126 xe到134倍。此外，在Xenon中的第37个原子电子中，第一个直接测量电子结合能，即少数EV的不确定性。所获得的值与计算出的价值相符，该值使用两个独立的不同实现dirac-hartree-fock方法。 Pentatrap为在高电荷重离子中对电子结合能的未来测量打开了大门，以对强烈的电磁场中的结合状态量子电动力学进行更严格的测试，并研究某些化学元素的同位素链中光暗物质的表现。
First ever measurements of the ratios of free cyclotron frequencies of heavy highly charged ions with Z>50 with relative uncertainties close to 1e-11 are presented. Such accurate measurements have become realistic due to the construction of the novel cryogenic multi-Penning-trap mass spectrometer PENTATRAP. Based on the measured frequency ratios, the mass differences of five pairs of stable xenon isotopes, ranging from 126Xe to 134Xe, have been determined. Moreover, the first direct measurement of an electron binding energy in a heavy highly charged ion, namely of the 37th atomic electron in xenon, with an uncertainty of a few eV is demonstrated. The obtained value agrees with the calculated one using two independent different implementations of the multiconfiguration Dirac-Hartree-Fock method. PENTATRAP opens the door to future measurements of electron binding energies in highly charged heavy ions for more stringent tests of bound-state quantum electrodynamics in strong electromagnetic fields and for an investigation of the manifestation of Light Dark Matter in isotopic chains of certain chemical elements.
