A study on accurate age measurement of buried wood by high-precision 14C dating and 14C wiggle matching

本研究的目的是在名古屋大学使用高精度AMS D114 D1C日期在buried wood samples上，利用高性能AMS D114 D1C日期系统。在过去的两年里，机器经常遇到的问题，这表明了实验的平滑行为。However，下面的研究成果很成功。（1） AMS-D114-D1C连续覆盖30年的一个木制卡车样本，由一个从北卡罗来纳州的扩建建造的热流沉积物，位于中国和韩国北部边界;（2） AMS-D114-D1C从湖泊沉积物提取有机碳的日期，以及（3）许多木质样本。a reproducibility test ofイイD114エD1C/イイD112エD1C measurement was performed successfully for NBS oxalic acidイD114エD1C standard， and reproducibilities ranged from ± 14 to ± 33 years。下一篇：D114 D1C约会系统的准确性已成功测试 ... More 在第十个世纪早期的十个世纪中，这是一个被认为有一个悲剧性的损害到了Bokkai Dinasty的破坏，这是因为它曾经统治了一个大面积的东北地区的中国。福泽估计的老化年龄（1999年），分析了在小瓦拉湖湖泊地区出现的变化， Aomori的位置，将于公元937年或938年。所有37年级戒指were separated by hand outer 30 rings were y D114 y D1C dated with the Tandetron AMS at Nagoya University。“样品显示的旧比预期的更好地使用碳材料中的碳污染，当它被埋在这一地区的时候。”第5至第12个戒指的第5至第12个戒指计数的外最大戒指，与标准一致性I114个I1 C年龄为登德同步的木制十个戒指，由Stuiver等人介绍（1998年）。福泽（1999年）提出了对北九州火山爆发的估计是可以接受的。对于其他相对年轻人的木材样本与高精度比±到± 60年的日期更好。Less（低）

The purpose of this research is to conduct high precision ィイD114ィエD1C dating on buried wood samples, by using a high performance AMS ィイD114ィエD1C dating system at Nagoya University. Troubles of the machine took place frequently during the past two years and this hindered the smooth conduct of the experiment. However, the following studies were performed successfully. (1) AMS ィイD114ィエD1C dating of continuous annual ring samples of covering totally 30 years from a wood trunk, that was buried by the pyroclasic flow deposits produced by an eruption from the Hakuto-san volcano, located on the border of China and North Korea, (2) AMS ィイD114ィエD1C dating of organic carbon extracted from lake sediments, and (3) many woody samples.First of all, a reproducibility test of ィイD114ィエD1C/ィイD112ィエD1C measurement was performed successfully for NBS oxalic acid ィイD114ィエD1C standard, and reproducibilities ranged from ± 14 to ± 33 years. Next, accuracy of the ィイD114ィエD1C dating system was tested successfully … More for eight IAEA samples of known ages.The Hakuto-san volcano erupted in the early of the tenth century and this is considered to have caused a tragic damage to the destruction of Bokkai Dinasty which was once ruling a large area of north-east part of a China. The eruption age was estimated by Fukusawa (1999), who analyzed varves appeared in the lake sediment of Ogawara Lake, Aomori prefecture, to be 937 or 938 AD. All 37 annual rings were separated by hand and outer 30 rings were ィイD114ィエD1C dated with the Tandetron AMS at Nagoya University. The outer for samples showed older ages than expected preferably owing to carbon contamination from carbonaceous materials surrounding the sample, when it had been buried in the sediment. The ィイD114ィエD1C ages of the 5th to 12th rings counted from the outermost ring, were consistent with the standard ィイD114ィエD1C age for dendrochronologically dated wood decadal rings, presented by Stuiver et al. (1998). This suggested that the estimation of the eruption of Hakuto-san volcano by Fukusawa (1999) is acceptable. For other wood samples of relatively younger ages were dated with high precision better than ± to ± 60 years. Less