校准质谱法测定铕原子量

A Calibrated Mass Spectrometric Measurement of the Atomic Weight of Europium

使用有确定化学纯度的高纯同位素^(151)Eu_2O_3和^(153)Eu_2O_3以配制标准溶液,并由此配制6种混合溶液,用来测定一台固体源热电离质谱计的质量岐视效应,从而校准天然铕的同位素丰度比。引用确知的有关核素质量,计算得出铕原子量为151.964±0.003,与国际现行值很好地符合。

Highly enriched isotopic reagents,^(151)Eu_2O_3 and ^(153)Eu_2O_3, of definite chemical purity were used to calibrate a solid ion-source thermal ionization mass spectrometer to find the mass discrimination effect, which applied to correct the isotopic abundance ratio measured for two minerals. Then, together from the known nuclidic masses the atomic weight of europium so calculated is 151. 964±0.003, agreeing well with the current value.