• Title, Summary, Keyword: radiocarbon dating

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Wiggle Matching for Radiocarbon Dating Korean Artifacts with Biannual Samples

  • Park, Won-Kyu;Nam, Tae-Kwang;Park, Jung-Hun;Hong, Wan
    • Journal of the Korea Furniture Society
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    • v.20 no.6
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    • pp.605-611
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    • 2009
  • This paper reports the application of radiocarbon wiggle matching for Korean wooden artifacts such as furniture and Buddhist statues for precise dating. Ten biannual samples of 20 years (AD 1249-1268) for AMS (accelerator mass spectrometry) radiocarbon measurements were prepared from a board of the pedestal for Buddhist statue at Jeongsusa (temple) in Kangwhado, Korea, which was dendrochronologically dated. The average 95.4% confidence interval of radiocarbon dating without wiggle matching was 123 year. When wiggle matching technique was applied, it became 37 year, 3.3 times smaller than that without wiggle matching. The results indicated that wiggle matching technique using the calibration curve for northern hemisphere (IntCal04: International radiocarbon calibration curve announced in 2004) can produce precise dates for Korean wooden artifacts which possess as much as 20 tree rings.

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Radiocarbon Dating (방사성탄소연대측정)

  • Leigh, Hyeon-Ju;Hwang, Jin-Ju;Paek, Hyun-Ju
    • 보존과학연구
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    • pp.197-214
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    • 2002
  • It is very important to determine the age of the Cultural Properties in archeology. In about 1950, W.F. Libby and a team of scientists at the University of Chicago developed the Radiocarbon Dating technique. Radiocarbon($^14$C) Dating is probably one of the most widely used and best known absolute dating methods. Radiocarbon ages are conventionally specified to the year 1950. This year is 0 BP year. BP is the initial of Before Present. The $^14$C within an organism is continually decaying into stable carbon isotopes. When $^14$C decays, it emits a $\beta$ - particle with an energy content of 156 KeV and becomes 14N. Only the $\beta$ - particle is detected by Liquid Scintillation Counting. $^14$C has a half life of 5730 years. It has been used to date samples as old as 50,000 years. Radiocarbon determinations can be obtained on organic material : wood, charcoal, shell, etc. The results of radiocarbon dating using Benzene Synthesizer and Liquid Scintillation Counter are KCP539 $4030\pm60$BP year, KCP540 $3980\pm60$BP year, KCP575 $4870\pm50$, KCP576 $100\pm50$BP year, KCP577 $130\pm50$BP yea and KCP578 $210\pm70$BP year.

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Bayesian Analysis for Uncertainty of Radiocarbon Dating (방사성탄소연대측정법의 불확실성에 대한 베이지안 분석)

  • Lee, Youngseon;Lee, Jaeyong;Kim, Jangsuk
    • The Korean Journal of Applied Statistics
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    • v.28 no.3
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    • pp.371-383
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    • 2015
  • Use of radiocarbon dating is increasing for chronology; however, its variability and discrepancy with existing chronologies can cause doubts in regards to credibility. In this paper, we explore factors that influence radiocarbon dating variabilities. We obtained estimated radiocarbon ages by sending identical samples to several labs multiple times. A Bayesian method was used to analyze the obtained data. From the analysis, we conclude that some factors (such as type of labs and megasamples) can induce variability when estimating radiocarbon age. We identify the size of variability caused by each factor and analyze the estimated variability in each lab corresponds with the reported variability.

Radiocarbon Dating of a Wooden Board from Mado Shipwreck No. 4 Using Wiggle Matching (위글 매치를 이용한 마도4호선의 방사성탄소연대 측정)

  • Nam, Tae Gwang;Hong, Kwang Hui;Lee, Ji Hee
    • Journal of Conservation Science
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    • v.33 no.4
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    • pp.275-281
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    • 2017
  • The purpose of this study was to carry out radiocarbon dating using a wiggle match, of wooden boards and grains from the Mado shipwreck No. 4, which was excavated from Mado in Taean-gun, Chungcheongnam-do. The result of the wiggle matching for four decennial tree-ring samples of the stern plank produced a ${\pm}2{\sigma}$ radiocarbon date (95.4% confidence interval) of A.D. 1337-1356 or A.D. 1412-1429. The grains produced a ${\pm}2{\sigma}$ radiocarbon date (95.4% confidence interval) of A.D. 1415-1455. This indicated that the Mado shipwreck No. 4 belonged to the early or middle of the 15th century. These radiocarbon dating results correlate with the date that was speculated by archaeologists according to the ship's structure and ceramic style.

Radiocarbon Dating of a Wooden Board from Yeongheung-do Shipwreck Using Wiggle Matching of Decennial Tree-Ring Samples (10년 간격 연륜의 위글매치를 이용한 영흥도선의 방사성탄소연대 측정)

  • Nam, Tae Gwang;Kim, Taek Joon;Moon, Hwan Suk
    • Journal of Conservation Science
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    • v.31 no.3
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    • pp.279-285
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    • 2015
  • The purpose of this study was to analyze radiocarbon dating, using wiggle match, of a wooden board from Yeongheung-do shipwreck excavated from Yeongheung-do in Incheon Ongjingun. The result of wiggle matching for 5 decennial tree-ring block samples of the hull bottom board produced ${\pm}2{\sigma}$ radiocarbon date (95.4% confidence interval) as A.D. 710~730 or A.D. 750~774. It indicated that the Yeongheung-do shipwreck belonged to the early or middle of the 8th century. Radiocarbon dating results confirmed the date speculated by archaeologists according to ship structure and pottery style.

The Study of Absolute Dating on Jinju Janghungri Kiln site. (진주 장흥리 와요지 유적의 절대편년연구)

  • Yi, Hyeon-Ju;Kim, Dae-Wung;Hong, Jong-Ouk;Shim, Il-Wun
    • 보존과학연구
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    • pp.189-202
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    • 2005
  • This study carried out to understand thermoluminescence dating of ancient tiles at Jinju Janghungri Kilin site. Also radiocarbon dating by the benzene synthesis method and Liquid scintillation counting method were performed for comparison for the agedetermination of charcoal sample at the obtained same site.1st and 2nd glow curve were obtained according to the typical method thermoluminescence. Plateau tests of revealed the proper temperature range to be $300~440^{\circ}C$ Palaeodose average values were formed to the 2.44Gy.Annual dose of ancient tiles was calculated from soil samples and ancient tiles it self by measuring alpha radiation dose, potassium concentrations and water contents respectively. Annual dose average values were calculated to be 7.012mGy/yr.The radiocarbon age(BP year) was converted to calibrated age(AD/BC year) using high precision curve. Radiocarbon ages were calculated to be AD 15~17 .Comparison of samples with their radiocarbon and thermoluminescence ages for revealed the in range the AD 15~17. This result means that the measured absolute ages are in good agreement with each other within the margin of error.

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The Study on the Radiocarbon Dating of Cheongok-dong Archeaological site, Ulsan (울산 천곡동 유적의 방사성탄소연대측정연구)

  • Yi, Hyeon-ju;Song, Hee-jeng
    • 보존과학연구
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    • pp.181-201
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    • 2006
  • In this study, radiocarbon dating by the benzene synthesis method and liquid scintillation counting method were performed for the age determination of coal sample at the Cheongok-dong archaeologicalsite, Ulsan. The results of radiocarbon age(BP year) are section Ga #1 $2920\pm50$ BP year, section Ga #5 $3100\pm55$BP year, section Ga #6 $2820\pm60$ BP year, section Na #5 $2650\pm50$ BP year. These ages were converted to calibrated age(AD/BC year) using high precision curve. The products on the excavation of Cheongok-dong archaeological site, Ulsan, section Ga #1 BC 1260-980 BC, section Ga #5 BC1460-1200 BC, section Ga #6 BC 1110~830 BC, section Na #5 BC 920-760 BC. Comparison of samples with radiocarbon and archaeological ages for revealed the approximation.

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Absolute Age Determination of Gangmun-dong Sites Gangneung, Gangwon-Do-Radiocarbon and Thermoluminescence Dating - (강릉 강문동 유적의 절대연대측정 - 방사성탄소연대 및 열발광연대 -)

  • Kang, Hyung-Tae;Chung, Kwang-Yong
    • Journal of Conservation Science
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    • v.18
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    • pp.97-104
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    • 2006
  • Absolute ages for three pieces of organic materials such as wood and shell were determined with radio-carbon concentrations and two potsherds with thermoluminescence measurements. Radiocarbon contents of each sample were compared with those of modern standard oxalate(NBS SRM4990C) and calculated radiocarbon ages of them. Quartz grains with diameter of $90\sim150{\mu}m$ were extracted from potsherds and used for measuring the archaeodose. Annual dose were calculated with measuring the alpha count rates and water contents and analysing $K_2O$ concentration of both potsherds and soils. Radiocarbon ages of organic materials were in the ranges of $4\sim2C$ BC and Quartz grain techniques for thermoluminescence dating showed 170 BC ud 210 BC respectively. It was found that the results of radiocarbon dating and TL dating were accorded with each other. But the deviations of TL dating have shown 13% and 20% respectively. It need to reduce the deviations.

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Radiocarbon Dating Practices by Benzene Liquid Scintillation Method (벤젠-액체 섬광계수법에 의한 $^{14}C$ 연대측정)

  • Lee, Yeon-Gyu;Choi, Jeong-Min;Kim, Chang-Gyu
    • The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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    • v.4 no.3
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    • pp.180-187
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    • 1999
  • Radiocarbon dating method using benzene liquid scintillation was performed on the oyster shell fragments which producted from the shell mounts at Hadong Mogdori in Kyeongsangnamdo. This paper described to the age dating method and compared to the result. The carbon in sample is synthesized to a benzene through the sample preparation, $SrCO_3$, $SrC_2$, $C_2H_2$ and $C_6H_6$ synthesizing process. Age dating is calculated by Wallac 1415 Liquid Scintillation Counter. The result of age dating is estimated to be $4905{\pm}112$ yr BP in Yosu Univ. which is a good agreement with the result in Shimane Univ. ($4912{\pm}123$ yr BP). Radiocarbon dating method using benzene liquid scintillation is a simple and economical in operation and establishment, it has a potential instrumentation in the university and research institute.

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