INTERCOMPARISON OF 14C DATING OF WOOD SAMPLES AT LUND UNIVERSITY AND ETH-ZURICH AMS FACILITIES: EXTRACTION, GRAPHITIZATION, AND MEASUREMENT
INTERCOMPARISON OF 14C DATING OF WOOD SAMPLES AT LUND UNIVERSITY AND ETH-ZURICH AMS FACILITIES: EXTRACTION, GRAPHITIZATION, AND MEASUREMENT
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DOI：
10.1017/s0033822200057519
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发表时间：
2013-01-01
期刊：
影响因子：
8.3
通讯作者：
Muscheler, R.
中科院分区：
文献类型：
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作者：
Adolphi, F.;Guettler, D.;Muscheler, R.
我们在隆德大学的放射性碳相关研究小组和已建立的ETH-Zurich设施之间进行了实验室间比较，以测试在隆德获得的结果的质量，并确定潜在背景差异和散射的来源。我们确实发现两个实验室在化学制备、石墨化和测量对整体背景的贡献方面存在差异。然而，由此产生的总体背景几乎相似。在两个实验室中，对已知日历年龄的2个木材样品进行多次测量，得到一致和准确的C-14年龄。然而，我们的一个已知样本表明，IntCal 09类似于7020日历年BP时的38 +/- 16 C-14 BP太年轻，这与IntCal 09的原始数据集一致。总的来说，我们的研究结果表明，一个系统的方法来比较不同的步骤参与C-14年龄测定是一个有用的练习，以查明目标，改善实验室常规和评估实验室间的差异。在比较不同实验室的整个制备和测量过程中的C-14测量值时，这些影响不一定变得明显。
We conducted an interlaboratory comparison between our radiocarbon-related research group at Lund University and the established ETH-Zurich facility to test the quality of the results obtained in Lund and to identify sources of potential background differences and scatter. We did find differences between the 2 laboratories in the contributions of chemical preparation, graphitization, and measurements to the overall background. The resulting overall background is, however, almost similar. Multiple measurements on 2 wood samples of known calendar age yield consistent and accurate C-14 ages in both laboratories. However, one of our known samples indicates that IntCal09 is similar to 38 +/- 16 C-14 BP too young at 7020 calendar yr BP, which is consistent with one of the raw data sets contributing to IntCal09. Overall, our results show that a systematic approach to compare the different steps involved in C-14 age determination is a useful exercise to pinpoint targets for improvement of lab routines and assess interlaboratory differences. These effects do not necessarily become apparent when comparing C-14 measurements that integrate over the whole process of preparation and measurement of different laboratories.