The radiocarbon (14C) calibration curve so far contains annually resolved data only for a short period of time. With accelerator mass spectrometry (AMS) matching the precision of decay counting, it is now possible to efficiently produce large datasets of annual resolution for calibration purposes using small amounts of wood. The radiocarbon intercomparison on single-year tree-ring samples presented here is the first to investigate specifically possible offsets between AMS laboratories at high precision. The results show that AMS laboratories are capable of measuring samples of Holocene age with an accuracy and precision that is comparable or even goes beyond what is possible with decay counting, even though they require a thousand times less wood. It also shows that not all AMS laboratories always produce results that are consistent with their stated uncertainties. The long-term benefits of studies of this kind are more accurate radiocarbon measurements with, in the future, better quantified uncertainties.

中文翻译：

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深入的年度树木年轮放射性碳比对的结果

放射性碳 (14C) 到目前为止，校准曲线仅包含短期内每年解析的数据。借助与衰变计数精度相匹配的加速器质谱 (AMS)，现在可以使用少量木材有效地生成具有年度分辨率的大型数据集，用于校准目的。此处介绍的一年树木年轮样本的放射性碳比对首次以高精度研究 AMS 实验室之间可能存在的偏移。结果表明，AMS 实验室能够以可比甚至超过衰变计数可能的准确度和精确度测量全新世时代的样本，即使它们需要的木材少一千倍。它还表明，并非所有 AMS 实验室总是产生与其声明的不确定性一致的结果。