scholarly journals AMS 14C Dating of Romanesque Rotunda and Stone Buildings of a Medieval Monastery in Łekno, Poland

Radiocarbon ◽  
2009 ◽  
Vol 51 (2) ◽  
pp. 471-480 ◽  
Author(s):  
Andrzej M Wyrwa ◽  
Tomasz Goslar ◽  
Justyna Czernik
Keyword(s):  
Radiocarbon Dating ◽  
Firing Process ◽  
Historical Sources ◽  
14C Dating ◽  
Central Poland ◽  
Phases Of Development ◽  
The Church ◽  
Archaeological Excavations ◽  
Ams 14C Dating ◽  
Better Than

Archaeological excavations performed for many years in Łekno, central Poland, have exposed relicts of wooden fortified settlements, and in its enclosure also basements of stone buildings, consisting of Romanesque rotunda and a Cistercian monastery, including an oratory, church, and abbot's house. Earlier archaeological, structural, and stratigraphical studies have shown that these buildings were constructed in a sequence and represented several phases of development.In this paper, we present results of radiocarbon dating of stone buildings of the rotunda and the monastery. For 14C dating, we used tiny pieces of charcoal retrieved from calcareous and gypsum mortar binding stone elements from the buildings. These pieces were incorporated in mortar during the firing process, where the fuel used for firing was wood. Most of the obtained 14C dates formed clear groups, confirming that individual buildings were constructed in separate periods. Calibrated 14C dates of these phases agree well with the constraints provided by historical sources, and enable us to set their ages with accuracy better than previously available. In particular, we have learned that the oldest rotunda was built at the boundary of the 10/11th centuries, and the church and the abbot's house, before AD 1250. However, some samples gave much too old 14C ages, clearly reflecting the use of old wood for firing. These problems were revealed only for samples from the rotunda and for the gypsum stone ornamental details.

scholarly journals Chronological Development of the Tripolye Culture Giant-Settlement of Talianki (Ukraine): 14C Dating vs. Pottery Typology

Radiocarbon ◽  
2011 ◽  
Vol 53 (4) ◽  
pp. 645-657 ◽  
Author(s):  
Yuri Rassamakin ◽  
Francesco Menotti
Keyword(s):  
Radiocarbon Dating ◽  
The Other ◽  
14C Dating ◽  
Relative Chronology ◽  
Phases Of Development ◽  
One Step ◽  
Tripolye Culture ◽  
Better Than

The long tradition of relative chronology based on pottery typology has often hindered the development of radiocarbon dating amongst the Tripolye giant-settlement in Ukraine. Although it is fairly reliable, relative chronology encounters insurmountable obstacles in identifying internal phases of development within a single settlement. This paper presents the first attempt to use 14C dates to monitor the chronological development of the Talianki giant-settlement, from its formation to the various phases of development and the final decline. It then goes one step further by proving genetic links between 2 “neighboring” settlements, confirming that one is the result of migration processes of the other. This study does not intend to prove that one of the dating techniques is better than the other, but to demonstrate that a synergetic combination of the 2 methods will certainly lead to more reliable results.

scholarly journals Correcting for Contamination in AMS 14C Dating

Radiocarbon ◽  
2002 ◽  
Vol 44 (2) ◽  
pp. 591-595 ◽  
Author(s):  
Ken Mueller ◽  
Paul Muzikar
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dating ◽  
Chemical Processing ◽  
14C Dating ◽  
Two Stage ◽  
Carbon Contamination ◽  
Ams 14C Dating

When using accelerator mass spectrometry (AMS) for radiocarbon dating, it is important to correct for carbon contamination that is added to the sample and the standard during chemical processing. We derive an equation for making this correction that generalizes previous work in several ways. We treat the case in which contaminating carbon is added during both the combustion step and graphitization step. Taking this two-stage contamination process into account is particularly important when only a fraction of the CO2 produced in the combustion is graphitized. We also allow for the fact that the 13C fractions of the sample, the standard, and the contaminants may be different.

scholarly journals A Counter System for High-Precision 14C Dating

Radiocarbon ◽  
1989 ◽  
Vol 31 (03) ◽  
pp. 399-406 ◽  
Author(s):  
Ede Hertelendi ◽  
Éva Csongor ◽  
Laszlo Zaborszky ◽  
Jozsef Molnar ◽  
Janos Gal ◽  
...  
Keyword(s):  
High Pressure ◽  
High Precision ◽  
Radiocarbon Dating ◽  
Data Evaluation ◽  
14C Dating ◽  
Counting Period ◽  
Low Level ◽  
Electrolytic Copper ◽  
Proportional Counters ◽  
Better Than

A multicounter radiocarbon dating system was developed applying the experiences of the previous one-channel low-level counting facility. The counter system consists of nine electrolytic copper proportional counters of identical diameters with sensitive volumes of 0.35–0.7dm3 and filled with either methane at high pressure (6 bar) or CO2 at 1 bar. The inner counters are surrounded by an anticoincidence shield consisting of five multiwire proportional flat counters filled with propane. The pulses of the detectors are handled by integrated amplifiers, discriminators and anticoincidence units interfaced to a microprocessor-controlled data evaluation unit. Software is written in BASIC using ASSEMBLER sub-routines. The overall precision of the system for modern carbon samples using high-pressure methane-filled counters (B ≍ 0.7 cpm, S ≍ 14 cpm) is better than 4 after a counting period of seven days.

scholarly journals Luminescence dating of bricks from the gothic Saint James Church in Toruń

2014 ◽  
Vol 41 (4) ◽  
pp. 352-360 ◽  
Author(s):  
Alicja Chruścińska ◽  
Anna Cicha ◽  
Natalia Kijek ◽  
Piotr Palczewski ◽  
Krzysztof Przegiętka ◽  
...  
Keyword(s):  
Dose Rate ◽  
Gamma Rays ◽  
Radiocarbon Dating ◽  
Luminescence Dating ◽  
Current Work ◽  
Historical Knowledge ◽  
History Of ◽  
Applied Approach ◽  
The Church ◽  
Archaeological Excavations

AbstractSaint James Church in Toruń is one of the most important gothic monuments in Poland. The date of the beginning of its construction is known from historical reports but the earlier history of the site remains undiscovered. During the archaeological excavations in years 2010 and 2011 five brick samples were collected for luminescence dating as well as four additional samples from the brick surroundings for the dose rate estimation. The equivalent dose was determined by TL and OSL methods. The TL results differ significantly from the OSL results but the last ones are verified by historical knowledge and radiocarbon dating. Establishing the dose rate from gamma rays needs a special attention because of the complex course of the foundations of the church. The details of the applied approach are presented in the current work. The results obtained indicate that a solid brick construction existed at the site of the presbytery of the Saint James Church before it was build.

scholarly journals AMS 14C Dating of the Cremated Human Bones and Funeral Fuel of the Western Balts. In Theory and in Practice

2019 ◽  
Vol 20 ◽  
pp. 40-74
Author(s):  
Roman Shiroukhov
Keyword(s):  
Static Analysis ◽  
Radiocarbon Dating ◽  
Baltic Region ◽  
14C Dating ◽  
Human Bones ◽  
Dating Method ◽  
Ams 14C Dating

The article is dedicated to the application of AMS 14C dating method of cremated bones and samples of related charcoal, which is rather new for the East Baltic region. The data of 3 Western Balts cemeteries from Lithuania are analysed. Results of radiocarbon dating are compared to the estimated typological chronology of the artefacts. The OxCal simulation is applied in order to obtain the most probable dates. The study lays the foundation for further spatial and static analysis of selected data.

The age of the subfossil trunk horizon in deposits of the Warta River valley (central Poland) based on 14C dating

2011 ◽  
Vol 38 (4) ◽  
pp. 334-340 ◽  
Author(s):  
Danuta Dzieduszyńska ◽  
Joanna Petera-Zganiacz ◽  
Marek Krąpiec
Keyword(s):  
Tree Ring ◽  
Environmental Conditions ◽  
Radiocarbon Dating ◽  
14C Dating ◽  
Geological Evidence ◽  
Central Poland ◽  
Late Vistulian ◽  
River Deposits ◽  
Time Record ◽  
Pollen Analyses

Abstract The present study focuses on investigations carried out in the Late Vistulian succession of the Warta River deposits (central Poland) in which a horizon of subfossil trees was excavated. Prelim-inary conclusions on time record and past environmental conditions of a forest existence determined from radiocarbon dating, pollen analyses and geological evidence appear promising with view of tree-ring chronologies.

scholarly journals Preparation of Graphite Targets in the Gliwice Radiocarbon Laboratory for AMS 14C Dating

Radiocarbon ◽  
2001 ◽  
Vol 43 (2A) ◽  
pp. 283-291 ◽  
Author(s):  
Justyna Czernik ◽  
Tomasz Goslar
Keyword(s):  
Standard Samples ◽  
14C Dating ◽  
Ams Radiocarbon Dating ◽  
Free Quartz ◽  
Significant Contamination ◽  
To Come ◽  
Ams 14C Dating ◽  
Better Than ◽  
Quartz Tubes

A line for preparation of graphite targets for accelerator mass spectrometry (AMS) radiocarbon dating has been built in the Gliwice 14C Laboratory. The AMS 14C measurements of our targets are performed in the Leibniz-Labor für Altersbestimmung, Kiel, Germany. The quality of our line has been tested in two series of AMS 14C measurements of background and Ox-II standard samples and by measurements of the amount of CO2 released during combustion of sample-free quartz tubes. Most background contamination in the first series was introduced during combustion, which has been greatly reduced by baking quartz tubes vacuum-sealed with CuO and Ag. The residual contamination (ca. 1.5 μg C) seems to come mostly from the quartz tubes themselves. At present, most of the contamination of the background is introduced during graphitization. The reproducibility of background preparations is satisfactory, especially for samples larger than 1.5 mg, when it is better than ± 0.09 pMC. Despite still significant contamination with low-14C carbon during the graphitization process (corresponding to 1.2 ± 0.2% of 14C-free carbon), the good reproducibility of the results allows us to use our line in routine 14C dating.

scholarly journals Successful AMS 14C Dating of Non-Hydraulic Lime Mortars from the Medieval Churches of the Åland Islands, Finland

Radiocarbon ◽  
2010 ◽  
Vol 52 (1) ◽  
pp. 171-204 ◽  
Author(s):  
Jan Heinemeier ◽  
Åsa Ringbom ◽  
Alf Lindroos ◽  
Árný E Sveinbjörnsdóttir
Keyword(s):  
Direct Contact ◽  
Radiocarbon Dating ◽  
14C Dating ◽  
Hydraulic Lime ◽  
Ams Radiocarbon Dating ◽  
Lime Mortars ◽  
Ams Dating ◽  
Chemical Testing ◽  
Shed Light ◽  
Ams 14C Dating

Fifteen years of research on accelerator mass spectrometry (AMS) radiocarbon dating of non-hydraulic mortar has now led to the establishment of a chronology for the medieval stone churches of the Åland Islands (Finland), where no contemporary written records could shed light on the first building phases. In contrast to other material for dating, well-preserved mortar is abundantly available from every building stage.We have gathered experience from AMS dating of 150 Åland mortar samples. Approximately half of them have age control from dendrochronology or from 14C analysis of wooden fragments in direct contact with the mortar. Of the samples with age control, 95% of the results agree with the age of the wood. The age control from dendrochronology, petrologic microscopy, chemical testing of the mortars, and mathematical modeling of their behavior during dissolution in acid have helped us to define criteria of reliability to interpret the 14C results when mortar dating is the only possibility to constrain the buildings in time. With these criteria, 80% of all samples reached conclusive results, and we have thus far been able to establish the chronology of 12 out of the 14 churches and chapels, while 2 still require complementary analyses.

The Strange Case of the Ankhpakhered Mummy: Results of AMS 14C Dating

Radiocarbon ◽  
2013 ◽  
Vol 55 (3) ◽  
pp. 1403-1408
Author(s):  
G Quarta ◽  
S Malgora ◽  
M D'Elia ◽  
V Gaballo ◽  
E Braione ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fourier Transform ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dating ◽  
14C Dating ◽  
Egyptian Mummy ◽  
Ams Radiocarbon Dating ◽  
Ancient Egyptian ◽  
The University ◽  
Ams 14C Dating

The ancient Egyptian mummy discovered in the wooden coffin of Ankhpakhered, priest of the god Min, has been studied at CEDAD (Centre for Dating and Diagnostics) at the University of Salento, Italy. The CT scan, performed by the multidisciplinary team of the Mummy Project of Milan, highlighted unusual features of the mummy, suggesting a reuse of the sarcophagus. Furthermore, specimens were taken via endoscopy for accelerator mass spectrometry (AMS) radiocarbon dating and Fourier transform infrared (FTIR) analyses, which have been carried out at CEDAD.

scholarly journals High-Resolution AMS 14C Dating of Post-Bomb Peat Archives of Atmospheric Pollutants

Radiocarbon ◽  
2001 ◽  
Vol 43 (2B) ◽  
pp. 495-515 ◽  
Author(s):  
Michael E Goodsite ◽  
Werner Rom ◽  
Jan Heinemeier ◽  
Todd Lange ◽  
Suat Ooi ◽  
...  
Keyword(s):  
High Resolution ◽  
Radiocarbon Dating ◽  
General Purpose ◽  
Atmospheric Pollutants ◽  
Published Data ◽  
14C Dating ◽  
Peat Deposits ◽  
Dating Method ◽  
Ams 14C Dating ◽  
Made In

Peat deposits in Greenland and Denmark were investigated to show that high-resolution dating of these archives of atmospheric deposition can be provided for the last 50 years by radiocarbon dating using the atmospheric bomb pulse. 14C was determined in macrofossils from sequential one cm slices using accelerator mass spectrometry (AMS). Values were calibrated with a general-purpose curve derived from annually averaged atmospheric 14CO2 values in the northernmost northern hemisphere (NNH, 30°–90°N). We present a thorough review of 14C bomb-pulse data from the NNH including our own measurements made in tree rings and seeds from Arizona as well as other previously published data. We show that our general-purpose calibration curve is valid for the whole NNH producing accurate dates within 1–2 years. In consequence, 14C AMS can precisely date individual points in recent peat deposits within the range of the bomb-pulse (from the mid-1950s on). Comparing the 14C AMS results with the customary dating method for recent peat profiles by 210Pb, we show that the use of 137Cs to validate and correct 210Pb dates proves to be more problematic than previously supposed.As a unique example of our technique, we show how this chronometer can be applied to identify temporal changes in Hg concentrations from Danish and Greenland peat cores.

Sign in / Sign up

Export Citation Format

Share Document