镓参考样品的绝对同位素丰度比和原子量。

Journal of research of the National Bureau of Standards (1977) Pub Date : 1986-11-01 DOI:10.6028/jres.091.036

L A Machlan, J W Gramlich, L J Powell, G M Lambert

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引用次数: 71

摘要

已经使用热电离质谱法获得了镓的参考样品（标准参考物质994）的同位素丰度比的绝对值。已知同位素组成的样品，由几乎同位素纯的分离镓同位素制备，用于校准质谱仪。得到的69Ga/71Ga的绝对比值为1.50676±0.00039，得到69Ga=60.1079±0.0062和71Ga=39.8921±0.0062的原子百分比。根据该同位素组成计算出的原子量为69.72307±0.00013。所示的不确定性是基于平均值的两个标准偏差和已知系统误差源影响的容差的总体误差极限。

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Absolute Isotopic Abundance Ratio And Atomic Weight Of a Reference Sample of Gallium.

An absolute value has been obtained for the isotopic abundance ratio of a reference sample of gallium (Standard Reference Material 994), using thermal ionization mass spectrometry. Samples of known isotopic composition, prepared from nearly isotopically pure separated gallium isotopes, were used to calibrate the mass spectrometers. The resulting absolute ⁶⁹Ga/⁷¹Ga ratio is 1.50676±0.00039, which yields atom percents of ⁶⁹Ga=60.1079±0.0062 and ⁷¹Ga=39.8921±0.0062. The atomic weight calculated from this isotopic composition is 69.72307±0.00013. The indicated uncertainties are overall limits of error based on two standard deviations of the mean and allowances for the effects of known sources of possible systematic error.

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Journal of research of the National Bureau of Standards (1977)

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