Direct Detection of Radiocarbon Using Accelerator Techniques and Its Application to Age Measurements
Direct Detection of Radiocarbon Using Accelerator Techniques and Its Application to Age Measurements
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使用加速器技术直接检测放射性碳及其在年龄测量中的应用
DOI：
10.1143/jjap.24.1716
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发表时间：
1985
影响因子：
1.5
通讯作者：
Shigeo Yoshioka
中科院分区：
文献类型：
--
作者：
Toshio Nakamura;N. Nakai;T. Sakase;Masaya Kimura;Shoji Ohishi;M. Taniguchi;Shigeo Yoshioka
1983年秋天，名古屋大学开始用串列加速器质谱仪直接探测14 C原子来测量放射性碳。地质和考古样品的14 C测年通常以±1%（±83年）的精度进行，使用仅含2-5 mg碳的碳-银靶，测量持续5小时。通过重现性试验估计单次14 C测量的准确度为± 1.34%。对10个天然样品用Tandetron谱仪测得的放射性碳年龄与放射性测量结果一致。光谱仪的14 C背景限制了可测量的年龄小于60000年BP。如果消除~（14）C背景，则极限将扩展到约82000 yBP。
Radiocarbon measurements by the direct detection of 14C atoms with the Tandetron accelerator mass spectrometer were begun in the autumn of 1983 at Nagoya University. The 14C dating of geological and archeological samples is routinely performed with a precision of ±1% (±83 years) using a carbon-silver target containing only 2–5 mg of carbon in measurements lasting 5 hours. The accuracy of a single 14C measurement was estimated by a reproducibility test to be ±1.34%. Radiocarbon ages measured with the Tandetron spectrometer for ten natural samples agreed well with those obtained by radioactivity measurements. The 14C background of the spectrometer limits the measurable age to less than 60000 y BP. The limit will be extended to about 82000 y BP if the 14C background is eliminated.