Findings from an in-Depth Annual Tree-Ring Radiocarbon Intercomparison
Findings from an in-Depth Annual Tree-Ring Radiocarbon Intercomparison
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DOI：
10.1017/rdc.2020.49
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发表时间：
2020-05
期刊：
影响因子：
8.3
通讯作者：
L. Wacker;E. Scott;A. Bayliss;D. Brown;E. Bard;S. Bollhalder;M. Friedrich;M. Capano;A. Cherkinsky;D. Chivall;B. Culleton;M. Dee;R. Friedrich;G. Hodgins;A. Hogg;D. Kennett;T. Knowles;M. Kuitems;T. Lange;F. Miyake;M. Nadeau;T. Nakamura;J. P. Naysmith;J. Olsen;T. Omori;F. Petchey;B. Philippsen;C. Bronk Ramsey;G. Prasad;M. Seiler;J. Southon;R. Staff;T. Tuna
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文献类型：
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作者：
L. Wacker;E. Scott;A. Bayliss;D. Brown;E. Bard;S. Bollhalder;M. Friedrich;M. Capano;A. Cherkinsky;D. Chivall;B. Culleton;M. Dee;R. Friedrich;G. Hodgins;A. Hogg;D. Kennett;T. Knowles;M. Kuitems;T. Lange;F. Miyake;M. Nadeau;T. Nakamura;J. P. Naysmith;J. Olsen;T. Omori;F. Petchey;B. Philippsen;C. Bronk Ramsey;G. Prasad;M. Seiler;J. Southon;R. Staff;T. Tuna
摘要放射性碳（14 C）校准曲线迄今只包含很短时间内的年度解析数据。随着加速器质谱仪（AMS）与衰变计数的精度相匹配，现在可以使用少量木材有效地产生用于校准目的的年度分辨率的大型数据集。这里介绍的单年树木年轮样本的放射性碳相互比较是第一次以高精度专门调查AMS实验室之间可能的偏移。结果表明，AMS实验室能够测量全新世的样本，其准确度和精度与衰变计数相当，甚至超过了衰变计数的可能性，即使它们需要的木材少一千倍。它还表明，并非所有的AMS实验室总是产生与其声明的不确定性一致的结果。这种研究的长期好处是更准确的放射性碳测量，在未来，更好地量化不确定性。
ABSTRACT 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.