^<14>C年代の補正と高精度化のための手法

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書誌事項

タイトル別名
  • Refinement of Radiocarbon Dates for Higher Precision and Accuracy.
  • ｀１４´Ｃ年代の補正と高精度化のための手法
  • 14C ネンダイ ノ ホセイ ト コウ セイドカ ノ タメ ノ シュホウ

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抄録

Correction and calibration of radiocarbon dates are indispensable procedures for accurate and precise age estimation. The most significant factors for correction and calibration are reservoir effect, isotopic fractionation, and secular variation in atmospheric 14C concentration. The correction of the reservoir effect is enabled by carbon-cycle modeling or by dating preatomic age marine samples of known age. The effect of isotopic fractionation ranges from 0 to -50 permill δ13C or up to 400 14C years. This effect is easily corrected through δ13C measurement using a mass spectorometer. Accumulated 14C dates of dendrochronologically dated tree ring samples made it possible to calibrate the deviation caused by 14C concentration variation. Now versatile correction and calibration programs for personal computers are available. High precision 14C dating will be meaningful through understanding all calibration and correction methods.

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  • 第四紀研究

    第四紀研究 34 (3), 191-194, 1995

    日本第四紀学会

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