scholarly journals THE BEST POSSIBLE TIME RESOLUTION: HOW PRECISE COULD A RADIOCARBON DATING METHOD BE? – ADDENDUM

Radiocarbon ◽  
2020 ◽  
Vol 62 (5) ◽  
pp. 1527-1527
Author(s):  
I Svetlik ◽  
A J T Jull ◽  
M Molnár ◽  
P P Povinec ◽  
T Kolář ◽  
...  
Keyword(s):  
Time Resolution ◽  
Radiocarbon Dating ◽  
Dating Method

scholarly journals The Best possible Time resolution: How precise could a Radiocarbon dating method be?

Radiocarbon ◽  
2019 ◽  
Vol 61 (6) ◽  
pp. 1729-1740 ◽  
Author(s):  
I Svetlik ◽  
A J T Jull ◽  
M Molnár ◽  
P P Povinec ◽  
T Kolář ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Time Resolution ◽  
Calibration Curve ◽  
Time Scale ◽  
Radiocarbon Dating ◽  
Time Intervals ◽  
High Slope ◽  
Resolution Curve ◽  
Dating Method ◽  
Fine Time

ABSTRACTToday, accelerator mass spectrometry (AMS) technology enables us to carry out very precise measurements of radiocarbon (14C). Unfortunately, due to fluctuations in the 14C calibration curve, the resulting calibrated time intervals vary from decades up to centuries in calibrated age. Within a time scale of several decades, we can find several time intervals on the 14C calibration curve which correspond with periods of rapid increases in atmospheric 14CO2 activity. Some of these “high slope” parts of the calibration curve could be used for fine time resolution for radiocarbon dating of individual samples. Nevertheless, there are certain limitations owing to the properties of the samples measured. We have prepared a time-resolution curve for the 14C dating method, applying calibration curve IntCal13 and assuming an uncertainty of 14C analyses ±15 yr BP (for recent samples). Our curve of the time resolution covers the last 50 ka. We found several time intervals with time resolution below 50 yr BP for the last 3 ka. Several time intervals which can enable substantially better time resolution compared to neighboring parts of the calibration curve were also found for periods older than 3 ka.

scholarly journals Radiocarbon Dating the Last Glacial-Interglacial Transition (Ca. 14–9 14C Ka Bp) in Terrestrial and Marine Records: The Need for New Quality Assurance Protocols

Radiocarbon ◽  
2000 ◽  
Vol 42 (1) ◽  
pp. 53-68 ◽  
Author(s):  
J John Lowe ◽  
Michael J C Walker
Keyword(s):  
Quality Assurance ◽  
Radiocarbon Dating ◽  
Ice Core ◽  
Time Interval ◽  
Last Glacial ◽  
Cold Stage ◽  
Dating Method ◽  
New Challenges ◽  
Important Time ◽  
The Last Glacial

The publication during the 1990s of Greenland ice-core records spanning the transition from the Last Cold Stage to the present interglacial (ca. 14–9 14C ka BP) presented new challenges to scientists working on marine and terrestrial sequences from this important time interval. In particular, there is now an overriding imperative to increase the levels of precision by which events during this period can be dated and correlated. We review some of the problems commonly encountered when using radiocarbon dating for these purposes, and consider some of the new approaches that will be required if this dating method is to provide a basis for a high precision chronology for the last glacial-interglacial transition.

Four Coptic Textiles from the Louvre Collection 14C Redated after 55 Years

Radiocarbon ◽  
2014 ◽  
Vol 56 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Mark van Strydonck ◽  
Dominique Bénazeth
Keyword(s):  
Standard Deviation ◽  
Radiocarbon Dating ◽  
Large Standard Deviation ◽  
Art Historians ◽  
Dating Method

Dating of Coptic textiles performed in the early days of the radiocarbon dating method was revisited. In 1957–1958, Louvre curator and art historian P du Bourguet had 4 Coptic textiles 14C dated by the Saclay laboratory. The results were rejected, not because of the large standard deviation (>100 yr), but because their ages did not support his chronological framework based on typological comparison. Furthermore, textiles with comparable ages were dated several centuries apart. As a result of this investigation, for many decades art historians rejected 14C as a dating tool for Coptic textiles. Re-examination of the old data and new 14C analyses revealed that mistakes were made, both in the reporting as in the interpretation of the data and that the textiles are much older than presumed.

Delayed Hardening and Reactivation of Binder Calcite, Common Problems in Radiocarbon Dating of Lime Mortars

Radiocarbon ◽  
2020 ◽  
Vol 62 (3) ◽  
pp. 565-577 ◽  
Author(s):  
Alf Lindroos ◽  
Åsa Ringbom ◽  
Jan Heinemeier ◽  
Irka Hajdas ◽  
Jesper Olsen
Keyword(s):  
Carbon Dioxide ◽  
Phosphoric Acid ◽  
Calcium Hydroxide ◽  
Radiocarbon Dating ◽  
Lime Mortars ◽  
Dating Method ◽  
Common Problems

ABSTRACTWhen sampling mortars for radiocarbon (14C) dating it is crucial to ensure that the sample has hardened rapidly relative the resolution of the dating method. Soft and porous lime mortars usually fulfill this criterion if the samples are taken from an uncovered surface from less than a few centimeters deep. However, hard, concrete-like mortars may be impermeable for carbon dioxide and even the outermost centimeters may still contain uncarbonated calcium hydroxide. These mortars may harden very slowly and contain carbonate that formed centuries or even millennia after the original building phase, and they can still be alkaline and capture modern 14C, causing younger 14C ages than the actual construction age. Another problem is reactivation of the binder carbonate if it has been partly decarbonated during a fire later on in its history. It will be shown that these young carbonates dissolve rapidly in phosphoric acid and in many cases a reasonable 14C age can be read from 14C profiles in sequential dissolution if the measurements from initially formed carbon dioxide are disregarded. However, if a mortar was made waterproof deliberately by adding crushed or ground tile, as in Roman cocciopesto mortars, it may be very difficult to get a conclusive dating.

Radiocarbon Dating and Egyptian Chronology—From the “Curve of Knowns” to Bayesian Modeling

2016 ◽  
Author(s):  
Felix Höflmayer
Keyword(s):  
Bayesian Modeling ◽  
Radiocarbon Dating ◽  
State Of The Art ◽  
Near Eastern ◽  
Open Questions ◽  
The World ◽  
Dating Method ◽  
To Come ◽  
Almost All ◽  
Egyptian Archaeology

Radiocarbon dating has become a standard dating method in archaeology almost all over the world. However, in the field of Egyptology and Near Eastern archaeology, the method is still not fully appreciated. Recent years have seen several major radiocarbon projects addressing Egyptian archaeology and chronology that have led to an intensified discussion regarding the application of radiocarbon dating within the field of Egyptology. This chapter reviews the contribution of radiocarbon dating to the discipline of Egyptology, discusses state-of-the-art applications and their impact on archaeological as well as chronological questions, and presents open questions that will be addressed in the years to come.

14C Dating of Historical Buildings in Japan

Radiocarbon ◽  
2014 ◽  
Vol 56 (02) ◽  
pp. 691-697 ◽  
Author(s):  
Nanae Nakao ◽  
Minoru Sakamoto ◽  
Mineo Imamura
Keyword(s):  
Research Method ◽  
Radiocarbon Dating ◽  
Historical Buildings ◽  
14C Dating ◽  
History Of ◽  
Dating Method ◽  
Japanese Architecture

The radiocarbon dating method was applied to the study of Japanese traditional wooden buildings. The traditional Japanese architecture studied includes the Main Hall of Banna-ji Temple (Buddhist building), Sekisui-in of Kozan-ji Temple (noble house), Hakogi-ke house (farmhouse), and Kawai-ke house (townhouse).14C dating proved useful as a research method to better understand the history of these buildings and Japanese architecture as a whole.

Predictable Low Enrichment of Methane Isotopes by Clusius-Dickel Thermal-Diffusion Columns for Use in Radiocarbon Dating Technique

1971 ◽  
Vol 26 (8) ◽  
pp. 1365-1370 ◽  
Author(s):  
H. Erlenkeuser
Keyword(s):  
Thermal Diffusion ◽  
Radiocarbon Dating ◽  
Total Sample ◽  
High Reproducibility ◽  
Operation Conditions ◽  
Sample Enrichment ◽  
Diffusion Column ◽  
Sample Amount ◽  
Dating Method ◽  
Optimal Values

By means of the Clusius-Dickel thermal-diffusion column the range of the radiocarbon dating method may be extended by 20 000 years. It is shown in this work that the total sample amount required is reasonably low, if column dimensions are suitably chosen. The enrichment run time and the length of the thermal-diffusion column will allow sample enrichment in routine operation. Optimal values of column dimensions and operation conditions are calculated.With an all metal thermal-diffusion column that has been carefully constructed, a high reproducibility is found. The stationary as well as the non-stationary state operation are in agreement with column theory within 1%, concerning the enrichment both of C13H4 and C14H4 in methane. The theory has been evaluated by numerical methods

scholarly journals Development of Radiocarbon Dating Method for Degraded Bone Samples from Korean Archaeological Sites

Radiocarbon ◽  
2011 ◽  
Vol 53 (1) ◽  
pp. 129-135 ◽  
Author(s):  
K J Kim ◽  
W Hong ◽  
J H Park ◽  
H J Woo ◽  
G Hodgins ◽  
...  
Keyword(s):  
Carbon Content ◽  
Depth Profile ◽  
Radiocarbon Dating ◽  
Archaeological Site ◽  
Archaeological Sites ◽  
The Past ◽  
Dating Method ◽  
Study Support ◽  
Ultrafiltration Process

The development of radiocarbon dating for degraded bone samples collected at Korean archaeological sites has been successful through the characterization of raw bone C/N ratios and application of an ultrafiltration method. It was found that the C/N ratios of raw bone samples are inversely proportional to the carbon content and residue amount after gelatinization. We have examined a few dozen Korean archaeological bone samples for this study. Well-preserved bone samples are found to be physically dense. The range of C/N ratios of Korean raw bone samples ranged from 3.4 to 74. We found that the C/N ratios of degraded raw bone samples can be used to determine whether 14C samples are acceptable for normal pretreatment processing and eventual dating. The results of this study support that even if the C/N ratio of a degraded raw bone sample is 11, extraction of collagen for bone dating is feasible by a carefully designed ultrafiltration process. Our preliminary 14C dating results of a depth profile of Gunang-gul Cave, an archaeological site in Danyang, Korea, indicate that this site has been either geologically or anthropologically disturbed in the past, with 14C ages ranging from 28,910 ± 200 to 48,090 ± 1050 yr BP. The C/N ratios of the collagen samples of Gunang-gul were determined to be 3.2–3.6. Our study establishes a new guide for the pretreatment of degraded bone samples such as those collected in Korea for 14C dating.

Radiocarbon dating at the British Museum — the end of an era

Antiquity ◽  
2002 ◽  
Vol 76 (291) ◽  
pp. 56-61
Author(s):  
Sheridan Bowman
Keyword(s):  
Radiocarbon Dating ◽  
Scientific Research ◽  
British Museum ◽  
Dating Method

For nearly half a century, the Radiocarbon Lab at the British Museum was at the forefront of helping to develop and in applying this fundamental dating method. Thousands of samples were processed, and innumerable sites and objects dated. Now the lab has closed, and Sheridan Bowman, the Keeper of the Department of Scientific Research, assesses the lab's contributions.

Carbon Dating the Image of Apo Santo Cristo de Lubao: From Oral History to Scientific Inquiry

2014 ◽  
Vol 8 (1) ◽  
Author(s):  
RODRIGO M. SICAT ◽  
XYRIS GERARD A. FERNANDEZ
Keyword(s):  
Social Sciences ◽  
Oral History ◽  
Scientific Inquiry ◽  
Radiocarbon Dating ◽  
Scientific Information ◽  
Scientific Research ◽  
Radiocarbon Age ◽  
Carbon Dating ◽  
Highly Sensitive ◽  
Dating Method

Oral history is important in preserving significant milestones in humanexperience. This scientific research was conducted to identify the age of the holyCrucifix using radiocarbon dating method. Specifically, it aims to carry out thestudy by identifying the age of the sacred Cross of the Crucified Image of Christthrough radiocarbon dating procedures, and to provide scientific information tothe people vis-à-vis results of the carbon dating analysis. Based on the findings ofthe study, radiocarbon dating analyses showed that Beta-316804 (The WoodenCross) indicated a measured radiocarbon age Cal AD 1650 to 1690 (Cal BP 300to 260) compared to Beta-316805 (Image of Christ) Cal AD 1680 to 1730 (Cal BP 270 to 220) as identified by Beta Analytic Incorporated in 2012. Results showthat at 2-sigma statistics (95% probability), 2 dates yielded overlapping ranges,indicating that the results are statistically identical. Analyses of samples indicatedthat samples came from the same tree. Beta-316804 (The Wooden Cross) is slightly older than Beta-316805 (Christ’s Image). In conclusion, the study revealed the proximity of the radiocarbon dating analyses to the traditional accounts of thepeople of Lubao, Pampanga. Considering the highly sensitive nature of analyticalchemistry apparatuses, the time ranges (ages) drawn from the chemical analyseswere closely proximate to the dates asserted by oral accounts of the place. The results reveal the antiquity of the Crucifix (Cross and Image of Christ). The resultsvalidated the customary and traditional social and religious norms of the peopleas regards their reverence and devotion to the Crucifix even in this contemporarymilieu.Keywords: Social Sciences, oral history, religious artifact, image, Apo Sto Cristo, radiocarbondating, Philippines

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