NEW VALUES FOR SILICON REFERENCE MATERIALS, CERTIFIED FOR ISOTOPE ABUNDANCE RATIOS

被引:11
作者
DEBIEVRE, P [1 ]
VALKIERS, S [1 ]
PESIER, HS [1 ]
机构
[1] NATL INST STAND & TECHNOL, GAITHERSBURG, MD 20899 USA
关键词
ABSOLUTE ABUNDANCES; ATOMIC WEIGHTS; CYCLOTRON FREQUENCIES; ISOTOPE ABUNDANCES; ISOTOPE RATIO MASS SPECTROMETRY; ISOTOPE REFERENCE MATERIALS; PENNING TRAP; RELATIVE ATOMIC MASSES; REFERENCE MATERIAL; SILICON; SILICON TETRAFLUORIDE;
D O I
10.6028/jres.099.016
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
New isotope abundance and relative atomic mass (atomic weight) values-with low, hitherto unattained uncertainty-are reported for two previously described silicon reference materials using a well-known method with an improved isotope-ratio mass spectrometer. These new values are directly traceable to the SI, more specifically to the unit for amount of substance, the mole, and independent of the SI unit of mass and of the Avogadro constant. Besides the residual mass-spectrometric uncertainties, these new values depend in effect only on a recently published direct comparison of the cyclotron frequency in a Penning trap of Si-28+ with that of C-12+.
引用
收藏
页码:201 / 202
页数:2
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