Calibration of the Radiocarbon Time Scale

放射性碳时标的校准

• 批准号: 9004492
• 负责人: Minze Stuiver
• 金额: $ 30万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-08-01 至 1994-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9004492&HistoricalAwards=false
• 关键词: Calibration; Radiocarbon; Time; Scale

This research permits Dr. Minze 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. 5,000 and 8,000 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 radio carbon 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 5,000 B.C., and this project will extend this by approximately another 3,000 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 discrepancies can be extremely important when comparisons are made from one culture area to another. For the more recent period, Dr. 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.

这项研究使Minze Stuiver博士及其同事 从其他实验室，进行放射性碳测定 一系列的德国和爱尔兰橡树， 约公元前5,000年和8,000年， 该样品是通过构造独立确定的， 从现在开始的年轮年表 可以追溯到过去 有了这些新的决定，博士。 Stuiver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，但它们并不完全相同。 使用该技术，已根据 可以追溯到公元前5,000年这个项目将通过 再过大约3,000年。 由于“放射性碳年龄”与“ 和“真实年龄”，有时具有不同真实年龄的材料可以 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 在更近的时期，Stuiver博士的校准曲线允许 一个人来纠正这一点，这是很重要的， 在时间上延伸得更远 这项研究不仅对考古学家很重要， 天文学家和天文学家，因为数据提供了 关于太阳辐射和大气中的 地球磁场。