Radiocarbon

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A ΔR Correction Value for Samoa from Known-Age Marine Shells
Radiocarbon - Tập 41 Số 1 - Trang 99-101 - 1999
Matthew Phelan
A first-order ΔR correction value for marine samples is presented based on 3 radiocarbon determinations of known-age marine shells from Samoa.
Radiocarbon Chronology of the Holocene Dead Sea: Attempting a Regional Correlation
Radiocarbon - Tập 43 Số 3 - Trang 1179-1189 - 2001
Amos Frumkin, Galit Kadan, Yehouda Enzel, Y. Eyal
Holocene sedimentary and geomorphic sequences from the Dead Sea region, Israel, are compared by correlation of more than 50 radiocarbon dates. The 14C dates provided the chronological basis that enabled us to detect basin-scale events that are hard to ascertain in single-site records. This paper is the first attempt to compare different Holocene records from several si...... hiện toàn bộ
Marine04 Marine Radiocarbon Age Calibration, 0–26 Cal Kyr Bp
Radiocarbon - Tập 46 Số 3 - Trang 1059-1086 - 2004
Konrad A Hughen, M. G. L. Baillie, Édouard Bard, J Beck, Chanda Bertrand, Paul G. Blackwell, Caitlin E. Buck, George S. Burr, Kirsten Cutler, Paul E. Damon, R. Lawrence Edwards, Richard G. Fairbanks, Michael Friedrich, T. P. Guilderson, Bernd Kromer, Gerry McCormac, Sturt W. Manning, Christopher Bronk Ramsey, Paula Reimer, Ron Reimer, Sabine Remmele, John Southon, Minze Stuiver, Sahra Talamo, Frederick W. Taylor, J. van der Plicht, C. E. Weyhenmeyer
New radiocarbon calibration curves, IntCal04 and Marine04, have been constructed and internationally ratified to replace the terrestrial and marine components of IntCal98. The new calibration data sets extend an additional 2000 yr, from 0–26 cal kyr BP (Before Present, 0 cal BP = AD 1950), and provide much higher resolution, greater precision, and more detailed structure than IntCal98. For...... hiện toàn bộ
Recent and Planned Developments of the Program OxCal
Radiocarbon - Tập 55 Số 2 - Trang 720-730 - 2013
Christopher Bronk Ramsey, Sharen Lee
OxCal is a widely used software package for the calibration of radiocarbon dates and the statistical analysis of 14C and other chronological information. The program aims to make statistical methods easily available to researchers and students working in a range of different disciplines. This paper will look at the recent and planned developments of the package. The re...... hiện toàn bộ
Radiocarbon Levels in the Iceland Sea from 25–53 kyr and their Link to the Earth's Magnetic Field Intensity
Radiocarbon - Tập 42 Số 3 - Trang 437-452 - 2000
Antje H L Voelker, Pieter Meiert Grootes, Marie‐Josée Nadeau, Michael Sarnthein
By correlating the climate records and radiocarbon ages of the planktonic foraminifera N. pachyderma(s) of deep-sea core PS2644 from the Iceland Sea with the annual-layer chronology of the GISP2 ice core, we obtained 80 marine 14C calibration points for the interval 11.4-53.3 ka cal BP. Between 27 and 54 ka cal BP the continuous record of ... hiện toàn bộ
University of Tokyo Radiocarbon Measurements IV
Radiocarbon - Tập 13 Số 1 - Trang 97-102 - 1971
Hiromi Kobayashi, Yasuko Matsui, Hisashi Suzuki
The C14 measurements reported here were made in this laboratory between January 1969 and July 1970. Details of our apparatus, sample preparation, and measuring procedure were described in R., 1968, v. 10, p. 144–148. A change has been made since January 1969: strontium carbonate is reduced to strontium carbide with a mixture of 60g of SrCO3 to 40g ...... hiện toàn bộ
Towards High-Precision AMS: Progress and Limitations
Radiocarbon - Tập 46 Số 1 - Trang 17-24 - 2004
Christopher Bronk Ramsey, Thomas Higham, Philip Leach
Precision and accuracy in accelerator mass spectrometry (AMS) dating relies on the systematic reduction of errors at all stages of the dating process, from sampling to AMS measurement. With new AMS systems providing much better precision and accuracy for the final stage of the process, we need to review the process as a whole to test the accuracy of reported results. A new High Voltage Eng...... hiện toàn bộ
Current Pretreatment Methods for AMS Radiocarbon Dating at the Oxford Radiocarbon Accelerator Unit (Orau)
Radiocarbon - Tập 52 Số 1 - Trang 103-112 - 2010
Fiona Brock, Thomas Higham, Peter Ditchfield, Christopher Bronk Ramsey
In this paper, we summarize the main chemical pretreatment protocols currently used for AMS radiocarbon dating at the Oxford Radiocarbon Accelerator Unit, updating the protocols last described by Hedges et al. (1989).
University of Rome Carbon-14 Dates XII
Radiocarbon - Tập 16 Số 3 - Trang 358-367 - 1974
M. Alessio, Francesco Bella, Salvatore Improta, G. Belluomini, Gilberto Calderoni, C. Cortesi, B. Turi
This list includes age measurements carried out from January 1972 to December 1973 with previously described CO2-proportional counters (Alessio et al, 1970). All archaeologic and geologic samples but one come from Italian territory.
Selection and Treatment of Data for Radiocarbon Calibration: An Update to the International Calibration (IntCal) Criteria
Radiocarbon - Tập 55 Số 4 - Trang 1923-1945 - 2013
Paula Reimer, Édouard Bard, Alex Bayliss, J Warren Beck, Paul G. Blackwell, Christopher Bronk Ramsey, David Brown, Caitlin E. Buck, R. Lawrence Edwards, Michael Friedrich, Pieter Meiert Grootes, T. P. Guilderson, Haflidi Haflidason, Irka Hajdas, Christine Hatté, Timothy Heaton, Alan Hogg, Konrad A Hughen, Klaus Félix Kaiser, Bernd Kromer, Sturt W. Manning, Ron Reimer, David A. Richards, E. M. Scott, John Southon, Chris Turney, J. van der Plicht
High-quality data from appropriate archives are needed for the continuing improvement of radiocarbon calibration curves. We discuss here the basic assumptions behind 14C dating that necessitate calibration and the relative strengths and weaknesses of archives from which calibration data are obtained. We also highlight the procedures, problems, and uncertainties involve...... hiện toàn bộ
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