The near-simultaneous discovery of both minor isotopes of oxygen in 1929 was a watershed moment for modern science, to say nothing of its impacts on isotope geochemistry. At the time, oxygen was the international standard for atomic weight, as it had been for over twenty-five years. However, chemists and physicists had grown fond of different definitions: physicists used the weight of the 16O atom, while chemists used half the weight of atmospheric oxygen (O2) to define the precise weight of 16 atomic mass units. While they usually avoided direct conflicts, these contrasting definitions found an unexpected impasse...

中文翻译：

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攀登富士山之巅：氧三重同位素系统学的联合理论与观察

1929年几乎同时发现了两种次要氧同位素，这是现代科学的分水岭，更不用说它对同位素地球化学的影响了。当时，氧气已经成为原子量的国际标准，已经超过25年了。但是，化学家和物理学家已经对不同的定义产生了兴趣：物理学家使用16O原子的重量，而化学家使用大气氧（O2）的一半重量来定义16个原子质量单位的精确重量。尽管它们通常避免直接冲突，但这些相反的定义发现了意外的僵局。