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

为了考察古代炼铁遗迹中的一种操作形式，我们提取了高纯度铁样品中固有的碳，并且我们非常精确，必须进行样品调整。为此，我们开发了燃烧/ CO_2分离/样品精制生产线，尽可能地消除了现代碳素污染的可能性。并且，超过90%的碳提取效率导致即使在存在少量碳含量时也提供燃烧条件。另外<14>，对出土的铁样品进行了加速器质谱法放射性碳年代测定，掌握了其时代考古价值，其年代与指示遗骸的年代一致，表明了其时代考古价值。从我当时使用的木炭中可以清楚地看出，通过这些研究结果挖掘出的铁遗骸的碳历史能够确认由铁遗骸制成的放射性碳测年测量的合法性和有效性。然而，另一方面，出现了各种检查问题。值得注意的是，在木炭和用于铁制造的^ C年龄中观察到时间差<14>，由此产生的铁除其他外。可以认为，这一时期的差异具有一定程度的规律性。此外，在锻钢中，δ ^<13>C显示出大于木炭的代表性δ ^ C的值<13>，这是铁材料中碳来源的原因，并且很明显可以产生碳同位素离散。

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.