Atomic Weights of the Elements 1999
Atomic Weights of the Elements 1999
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DOI：
10.1063/1.1395055
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发表时间：
2001-09
影响因子：
4.3
通讯作者：
T. Coplen
中科院分区：
文献类型：
--
作者：
T. Coplen
对原子量、Ar（E）测定和其他同源数据的两年期审查导致下列元素的标准原子量发生变化：从氮14.006 74±0.000 07 <$14.0067 ±0.0002 <$硫32.066 ±0.00632.065± 0.005氯35.4527 ±0.000935.453± 0.002锗72.61 ±0.0272.64± 0.01氙131.29 ±0.02131.293± 0.006铒167.26 ±0.03 167.259± 0.003铀238.0289 ±0.0001238.028 91±0.000 03给出了更新的标准原子量及其不确定度表，该表是结合实验不确定度和地球变化估计的。此外，本报告还载有一份关于选定放射性同位素的相对原子质量值和半衰期的最新表格。与1997年公布的数据相比，同位素丰度评估值的变化很小，因此不会公布1999年的最新清单。在某些非地球物质中，许多元素有不同的同位素组成。一些关于母核的最新数据可能会影响同位素丰度或……
The biennial review of atomic-weight, Ar(E), determinations and other cognate data have resulted in changes for the standard atomic weights of the following elements: fromtonitrogen14.006 74±0.000 07¯14.0067±0.0002¯sulfur32.066±0.00632.065±0.005chlorine35.4527±0.000935.453±0.002germanium72.61±0.0272.64±0.01xenon131.29±0.02131.293±0.006erbium167.26±0.03167.259±0.003uranium238.0289±0.0001238.028 91±0.000 03Presented are updated tables of the standard atomic weights and their uncertainties estimated by combining experimental uncertainties and terrestrial variabilities. In addition, this report again contains an updated table of relative atomic mass values and half-lives of selected radioisotopes. Changes in the evaluated isotopic abundance values from those published in 1997 are so minor that an updated list will not be published for the year 1999. Many elements have a different isotopic composition in some nonterrestrial materials. Some recent data on parent nuclides that might affect isotopic abundances or...