Improved Calibration of the Radiocarbon Time Scale

这笔赠款允许Stuiver博士和他的同事们 其他实验室进行放射性碳测定 一系列德国和爱尔兰橡树，可追溯到公元前2000年至公元前2000年。 公元前2500年和公元前5200年， 样品通过构建独立确定 从现在开始并有效的年轮编年史 回到过去有了这些新的决定，Stuiver博士 将构建一系列校准， 将放射性碳年精确换算成真实年龄。虽然 两者密切相关但并不完全相同。使用此 从现在起，已经建立了技术校准 可以追溯到公元前2500年，这个项目将延长这一点， 大约2700年。 由于“放射性碳年龄”与“ 而“真实年龄”有时候真实年龄不同的材料 放射性碳年龄相同在某些放射性碳年代， 真实年龄的可能范围可以更小，在其他情况下可以更大。 对于考古学家来说，这些差异可能极其重要 当从一个文化区域到另一个文化区域进行比较时。为 Stuiver的校准曲线允许人们 这是正确的，重要的是，这是扩展 更早的时候 这项研究不仅对考古学家很重要， 天文学家和天体物理学家因为这些数据提供了 太阳辐射和地球磁场的变化 领域

This grant permits Dr. Stuiver, together with colleagues from other laboratories to conduct radiocarbon determinations on a series of German and Irish oak trees which date from between ca. 2500 and 5200 B.C. The absolute ages of tree rings within this sample are independently determined through the construction of an annual ring chronology which starts at the present and works back into the past. With these new determinations, Dr. Stuiver will construct a series of calibrations which will allow the accurate conversion of radiocarbon years into true age. Although the two are closely correlated they are not identical. Using this technique calibrations have been established from the present back to 2500 B.C. and this project will extend this by approximately another 2700 years. Because of the complicated relationship between "radiocarbon age" and "true age" sometimes materials with different true ages can give the same radiocarbon age. At some radiocarbon ages, the possible range of true ages can be smaller and at others larger. For archaeologists these discrepencies can be extremely important when comparisons are made from one culture area to another. For the more recent period Stuiver's calibration curve allows one to correct for this and it is important that this be extended further back in time. This research is important not only to archaeologists but to astronomers and geophysicists since the data provides information about changes in both solar radiation and in the earth's magnetic field.