Penning Trap Measurements of the Masses of C133s, R87,85b, and N23a with Uncertainties ≤0.2 ppb
Penning Trap Measurements of the Masses of C133s, R87,85b, and N23a with Uncertainties ≤0.2 ppb
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C133s、R87,85b 和 N23a 质量的彭宁阱测量，不确定度 ≤0.2 ppb
DOI：
10.1103/physrevlett.83.4510
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
D. Pritchard
中科院分区：
文献类型：
--
作者：
M. P. Bradley;J. V. Porto;S. Rainville;J. K. Thompson;D. Pritchard
我们报道了Penning陷阱单离子质谱仪对原子质量的新值：{133}\mathm{Cs}$，$}^{87}\mathm{Rb}$，$^^{85}\mathm{Rb}$和$^^{23}\mathm{Na}$，不确定度为0.2\mathm{ppb}，比以前测量值的准确度提高了100倍。我们找到了$M{(}^{133}\mathrm{Cs})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}132.905451931(27)u$，$M{(}^{87}\mathrm{Rb})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}86.909180520(15)u$，$M{(}^{85}\mathrm{Rb})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}84.911789732(14)u$，和$M{(}^{23}\mathrm{Na})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}22.9897692807(28)u$.这些值对于摩尔-普朗克常数${N}_{A}h$和精细结构常数{\α}的新ppb水平的测定是重要的。通过测量$^^{133}\mathm{Cs}$，我们将亚ppb测量的质量范围增加了3倍。从$M{(}^^{133}\mathm{Cs})$和其他值我们推导出${\ensuremath{\alpha}}^{\ensuremath{-}1}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}137.0359922(40)$.
We report new values from Penning trap single ion mass spectrometry for the atomic masses of ${}^{133}\mathrm{Cs}$, ${}^{87}\mathrm{Rb}$, ${}^{85}\mathrm{Rb}$, and ${}^{23}\mathrm{Na}$ with uncertainties $\ensuremath{\le}0.2\mathrm{ppb}$, a factor of 100 improvement over the accuracy of previously measured values. We have found $M{(}^{133}\mathrm{Cs})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}132.905451931(27)u$, $M{(}^{87}\mathrm{Rb})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}86.909180520(15)u$, $M{(}^{85}\mathrm{Rb})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}84.911789732(14)u$, and $M{(}^{23}\mathrm{Na})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}22.9897692807(28)u$. These values are important for new ppb-level determinations of the molar Planck constant ${N}_{A}h$ and the fine-structure constant \ensuremath{\alpha}. With the measurement of ${}^{133}\mathrm{Cs}$ we have increased the mass range for sub-ppb measurements by a factor of 3. From $M{(}^{133}\mathrm{Cs})$ and other values we derive ${\ensuremath{\alpha}}^{\ensuremath{-}1}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}137.0359922(40)$.