金属铼带材料中的铼同位素组成和原子量

The Isotopic Compositions of Rhenium in Rhenium Ribbon Materials with Different Origins

本文采用热电离质谱法精确测定了三种铼带材料中的铼同位素组成,平均^(185)Re/^(187)Re比值为0.59721±0.00008(2SD),由此计算得到铼的原子量为Ar(Re)=186.20693(6)

The isotopic ratios of rhenium in three rhenium ribbon materials with different origins have been measured by thermal ionization mass spectrometry. The average ^(185)Re/^(187)Re ratio for three samples was determined to be 0.59721±0.00008(2SD) with a preeision of 0.013% (95% confidence limits), yielding a new value of the atomic weight of rhenium is 186.20693(6).