The actual grasp of an operation form in iron manufacture remains of the ancient times -Using radiocarbon dating with an accelerator mass spectrometry -

为了检验古代炼铁遗迹中的一种操作形式，我们提取了高纯度、高精度的铁样品中固有的碳，必须进行样品调整。因此，我们开发了燃烧/CO_2分离/样品精炼生产线，尽可能地消除现代碳污染的可能性。而且抽碳效率在90%以上，即使在含碳量很少的情况下也能提供燃烧条件。并对出土的铁样进行了放射性碳谱测年，获得了遗骸考古学的世代价值，其年代与指标遗骸相同，显示了遗骸考古的年代。很明显，它来自我当时使用的木炭，通过这些研究成果挖掘出的铁遗骸的碳史能够证实由铁遗骸制成的放射性碳测年的合法性和有效性。但另一方面，也出现了各种检验问题。一件值得注意的事情是，在木炭和用于炼铁的14&gt；C年龄中观察到了时间差，其中包括由此产生的铁。它被认为是这样的，即在这两个时间之间的差异中存在一定程度的规则性质。此外，在锻钢中，δ^&lt；13&gt；C的值大于木炭的代表性δ^&lt；13&gt；C的值，这是铁材料中碳来源的原因，显然可以产生碳同位素离散性。

In order to examine an operation form in iron manufacture remains of the ancient times, We extracted the carbon which was inherent in an iron sample in high purity and we were highly precise and had to do sample adjustment. Therefore, We developed combustion / CO_2 separation / a refinement line of the sample which could remove possibility of pollution by modern carbon as much as possible. And the carbon extraction efficiency more than 90% led a combustion condition to be provided even if I put it when there were a little carbon contents. As a result, I get possible to get ^<14>C age without pollution by modern carbon.In addition, I did the radiocarbon dating with an accelerator mass spectrometry of the excavated iron sample which I could grasp of a generation value of archeology of remains, They showed the age the same as the index remains which showed an age of archeology of remains. It became clear to come from the charcoal which I used at the time, and the carbon history of iron remains excavated by these results of research was able to confirm legitimacy and the effectiveness of what radiocarbon dating of being made of iron remains measured.However, on the other hand, various examination problems occurred. A remarkable thing is for a time difference to be watched in charcoal and ^<14>C age used for iron manufacture of iron generated thereby among other things. It is supposed so that there is rule nature of a certain degree in a difference between this time. Furthermore, In forging steel, The δ ^<13>C showed a value bigger than representative δ ^<13>C of the charcoal which was the cause of a carbon origin in the iron material, and it became clear that carbon isotope discretion could be generated.