scholarly journals Gas Proportional Versus Liquid Scintillation Counting, Radiometric Versus AMS Dating

Radiocarbon ◽  
1991 ◽  
Vol 33 (1) ◽  
pp. 9-13 ◽  
Author(s):  
Páll Theodórsson
Keyword(s):  
Mass Spectrometry ◽  
Radiocarbon Dating ◽  
Liquid Scintillation ◽  
Scintillation Counting ◽  
Comparison Of Methods ◽  
Mass Spectrometry Technique ◽  
Single Detector ◽  
Ams Dating ◽  
Spectrometry Technique ◽  
Single Figure

I discuss here the basis of a comparison of methods for radiocarbon dating and introduce a new index for the relative merit of a system, factor of counting capacity, that is generally more appropriate than the commonly used factor of merit. The merit of a dating system cannot be based on a single figure but other factors must also be considered. A comparison of the gas proportional, liquid scintillation and accelerator mass spectrometry technique is presented that for gas proportional counters is based on a multi-detector system rather than a single detector.

scholarly journals Direct Radiocarbon Dating of Pottery: Selective Heat Treatment to Retrieve Smoke-Derived Carbon

Radiocarbon ◽  
1995 ◽  
Vol 37 (2) ◽  
pp. 275-284 ◽  
Author(s):  
Emmanuelle Delqué Količ
Keyword(s):  
Mass Spectrometry ◽  
Heat Treatment ◽  
Liquid Scintillation Counting ◽  
Radiocarbon Dating ◽  
Liquid Scintillation ◽  
Variable Temperature ◽  
Standard Procedure ◽  
Scintillation Counting ◽  
Ams Dating ◽  
Naoh Treatment

I attempted to separate smoke-derived carbon from carbon derived from clay by variable-temperature burning. First, using liquid scintillation counting (LSC) and accelerator mass spectrometry (AMS), I dated experimental potsherds containing these two sources of carbon. I used the same techniques to date archaeological samples. The results on archaeological sherds confirm the difficulty of establishing a standard procedure for pottery dating. Nevertheless, reliable dates on smoke-blackened potsherds are potentially obtainable with AMS dating of thin lamellas in the sherd surface following adequate NaOH treatment.

scholarly journals The Application of ICELS Systems for Radiocarbon Dating

Radiocarbon ◽  
2010 ◽  
Vol 52 (4) ◽  
pp. 1661-1666 ◽  
Author(s):  
Konrad Tudyka ◽  
Anna Pazdur ◽  
Páll Theodórsson ◽  
Adam Michczyński ◽  
Jacek Pawlyta
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Liquid Scintillation Counting ◽  
Radiocarbon Dating ◽  
Liquid Scintillation ◽  
Scintillation Counting ◽  
Counting Time ◽  
First Results ◽  
High Degree ◽  
Larger Sample

Liquid scintillation counting (LSC) for radiocarbon dating is a less expensive method than accelerator mass spectrometry (AMS), provides a high degree of accuracy, and is less prone to contamination due to the larger sample sizes. However, to obtain high precision, a long counting time is needed. The Gliwice Radiocarbon Laboratory is seeking to obtain an increased counting capacity with 2–3 mL benzene samples than we presently can achieve with our 2 Quantulus systems. We are therefore investigating the possibility of using a simple, single-phototube LS system (ICELS) for dating samples younger than 5000 yr. We present the first results of this investigation, including the measurement of 3 VIRI and 3 FIRI intercomparison samples.

scholarly journals Dating of Ancient Icons from Kiev Art Collections

Radiocarbon ◽  
2001 ◽  
Vol 43 (2B) ◽  
pp. 1065-1075 ◽  
Author(s):  
N Kovalyukh ◽  
J van der Plicht ◽  
G Possnert ◽  
V Skripkin ◽  
L Chlenova
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Liquid Scintillation Counting ◽  
Liquid Scintillation ◽  
Scintillation Counting ◽  
Art Collections ◽  
Radiocarbon Dates ◽  
Dating Methods ◽  
Ams Dating ◽  
First Time

Icon painting in the Ukraine is rooted in the Byzantine culture, after the conversion to the Christian religion. During the medieval epoch, Kiev became the artistic center for highly skilled icon painters. The icons were painted on wooden boards, specially made for this purpose. Historic dating of some even well-known icons is uncertain or not precise. Here we present for the first time radiocarbon dates for selected icons. Both liquid scintillation counting (LSC) and accelerator mass spectrometry (AMS) dating methods were applied, allowing intercomparison.

The Brazilian AMS Radiocarbon Laboratory (LAC-UFF) and the Intercomparison of Results with CENA and UGAMS

Radiocarbon ◽  
2013 ◽  
Vol 55 (2) ◽  
pp. 325-330 ◽  
Author(s):  
K D Macario ◽  
P R S Gomes ◽  
R M Anjos ◽  
C Carvalho ◽  
R Linares ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Latin America ◽  
Liquid Scintillation Counting ◽  
Nuclear Energy ◽  
Liquid Scintillation ◽  
Scintillation Counting ◽  
Physics Institute ◽  
University Of Georgia ◽  
The University ◽  
Good Agreement

After 22 yr of the low-level liquid scintillation counting 14C laboratory at the Center for Nuclear Energy in Agriculture (CENA) at São Paulo University (USP), Piracicaba, Brazil, and several collaborative projects with Brazilian and international researchers from distinct scientific areas, the first 14C accelerator mass spectrometry (AMS) laboratory in Latin America was installed at the Physics Institute of the Universidade Federal Fluminense (UFF), Niterói, Brazil. A 250kV single stage accelerator produced by National Electrostatics Corporation began its operation in 2012. In this work, we compare measurements performed at the AMS Radiocarbon Laboratory at UFF (LAC-UFF) with those performed at CENA and the University of Georgia (UGAMS), Georgia, USA. All the results obtained from distinct inorganic and organic samples were in very good agreement.

scholarly journals Precise 14C Measurement By Liquid Scintillation Counting

Radiocarbon ◽  
1979 ◽  
Vol 21 (1) ◽  
pp. 1-21 ◽  
Author(s):  
Gordon W Pearson
Keyword(s):  
Liquid Scintillation Counting ◽  
Count Rate ◽  
Radiocarbon Dating ◽  
Liquid Scintillation ◽  
Scintillation Counting ◽  
Reference Standard ◽  
Standard Material ◽  
Image Position

Radiocarbon dating involves a comparison of the count rate of sample carbon with that of modern reference standard material. To calculate a date the ratio Z must be determined where

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