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在同位素地质年龄计算中放射性元素的衰变常数是一个很重要的参数,由于它的不一致性,就会使同位素组成完全相同的样品得出不一致的年龄值。例如λ~(40)K_e=0.557×10~(-10)年~(-1)与λ~(40)K_e=0.585×10~(-10)年~(-1)相比较,用前者计算的年龄要比后者大5％左右。这种不一致性必然会造成同位素年龄数据在应用上和对比上的困难。世界各国同位素地质年代学工作者曾试图建立国际统一标准,经过多年努力现已趋于一致。这是一项重大的研究成果。
The decay constant of radioactive elements in isotopic geologic age calculations is a very important parameter because of its inconsistency that leads to inconsistent age values for samples with identical isotopic composition. For example, λ ~ (40) K_e = 0.557 × 10 ~ (-10) ~ (-1) and λ ~ (40) K_e = 0.585 × 10 ~ Older than the latter about 5%. This inconsistency will inevitably lead to difficulties in the application and comparison of isotope age data. Isotopic geochronology workers from all over the world have tried to establish an internationally agreed standard and have now become more consistent through years of hard work. This is a major research result.