Penning trap measurements of the masses cog 133Cs, 87,85Rb, and 23Na with uncertainties ≤0.2 ppb

被引：189

作者：

Bradley, MP ^{[1
]}

Porto, JV

Rainville, S

Thompson, JK

Pritchard, DE

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.83.4510

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report new values from Penning trap single ion mass spectrometry for the atomic masses of Cs-133, Rb-87, Rb-85, and Na-23 with uncertainties less than or equal to 0.2 ppb, a factor of 100 improvement over the accuracy of previously measured values. We have found M(Cs-133) = 132.905451931(27)u, M(Rb-87)= 86.909180520(15)u, M(Rb-85) = 84.911789732(14)u, and M(Na-23) = 22.9897692807(28)u. These values are important for new ppb-level determinations of the molar Planck constant N(A)h and the finestructure constant alpha. With the measurement of Cs-133 We have increased the mass range for sub-ppb measurements by a factor of 3. From M(Cs-133) and other values we derive alpha(-1) = 137.0359922(40).

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页码：4510 / 4513

页数：4

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