Deuteron-to-Proton Mass Ratio from Simultaneous Measurement of the Cyclotron Frequencies of H2+ and D+
Deuteron-to-Proton Mass Ratio from Simultaneous Measurement of the Cyclotron Frequencies of H2+ and D+
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DOI：
10.1103/physrevlett.127.243001
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发表时间：
2021-12-07
影响因子：
8.6
通讯作者：
Myers, Edmund G.
中科院分区：
文献类型：
--
作者：
Fink, David J.;Myers, Edmund G.
通过同时测量H ~（2+）离子和氘核在耦合磁控管轨道上的回旋频率，我们对它们的回旋频率比进行了一系列的测量。从观察到的H-2（+）质量能量的变化，我们跟踪了三个离子的衰减到振动基态。我们能够将我们测量的一些比率分配给特定的振转能级，从而减少由于H-2（+）转动能引起的不确定性。假设最可能的分配，我们得到一个氘核与质子的质量比，m（d）/m（p）= 1.999 007 501 272（9）。结合氘的原子质量[S。Rau等人，Nature（伦敦）585，43（2020）.]我们还得到了质子原子质量的新值，m（p）= 1.007276466574（10）u.
By simultaneously measuring the cyclotron frequencies of an H-2(+) ion and a deuteron in a coupled magnetron orbit we have made an extended series of measurements of their cyclotron frequency ratio. From the observed changes in H-2(+) mass energy we have followed the decay of three ions to the vibrational ground state. We are able to assign some of our measured ratios to specific rovibrational levels, hence reducing uncertainty due to H-2(+) rotational energy. Assuming the most probable assignment, we obtain a deuteron-to-proton mass ratio, m(d)/m(p) = 1.999 007 501 272(9). Combined with the atomic mass of the deuteron [S. Rau et al., Nature (London) 585, 43 (2020).] we also obtain a new value for the atomic mass of the proton, m(p) = 1.007 276 466 574(10) u.