scholarly journals Seoul National University Accelerator Mass Spectrometry (SNU-AMS) Radiocarbon Date List IV

Radiocarbon ◽  
2007 ◽  
Vol 49 (3) ◽  
pp. 1395-1402 ◽  
Author(s):  
M Youn ◽  
Y M Song ◽  
J Kang ◽  
J C Kim ◽  
M K Cheoun
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
Accelerator Mass Spectrometry ◽  
Environmental Samples ◽  
Before Present ◽  
Geological Data ◽  
National University ◽  
Recent Developments ◽  
Seoul National University ◽  
Accelerator System

The accelerator mass spectrometry (AMS) facility at Seoul National University (SNU-AMS) was accepted in December 1998 and results reported first at the Vienna AMS conference in October 1999 and at the 17th Radiocarbon Conference in Israel, June 2000. At the Vienna conference, we reported our accelerator system and sample preparation systems (Kim et al. 2000). Recent developments of the AMS facility have been regularly reported at AMS conferences (Kim et al. 2001, 2004, 2007). Meanwhile, about 1000 unknown archaeological, geological, and environmental samples have been measured every year. In this report, the archaeological and geological data carried out in 2002 are presented in terms of years BP (before present, AD 1950), following the SNU-AMS date lists I and II published in Radiocarbon (Kim et al. 2006a,b).

scholarly journals Seoul National University Accelerator Mass Spectrometry (SNU-AMS) Radiocarbon Date List III

Radiocarbon ◽  
2007 ◽  
Vol 49 (3) ◽  
pp. 1387-1394 ◽  
Author(s):  
M Youn ◽  
Y M Song ◽  
J Kang ◽  
J C Kim ◽  
M K Cheoun
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
Accelerator Mass Spectrometry ◽  
Environmental Samples ◽  
Before Present ◽  
Geological Data ◽  
National University ◽  
Recent Developments ◽  
Seoul National University ◽  
Accelerator System

The accelerator mass spectrometry (AMS) facility at Seoul National University (SNU-AMS) was accepted in December 1998 and results reported first at the Vienna AMS conference in October 1999 and at the 17th Radiocarbon Conference in Israel, June 2000. At the Vienna conference, we reported our accelerator system and sample preparation systems (Kim et al. 2000). Recent developments of the AMS facility have been regularly reported at AMS conferences (Kim et al. 2001, 2004, 2007). Meanwhile, about 1000 unknown archaeological, geological, and environmental samples have been measured every year. In this report, the archaeological and geological data carried out in 2001 are presented in terms of years BP (before present, AD 1950), following the SNU-AMS date lists I and II published in Radiocarbon (Kim et al. 2006a,b).

scholarly journals Progress at the Seoul National University AMS Facility

Radiocarbon ◽  
2001 ◽  
Vol 43 (2A) ◽  
pp. 163-167 ◽  
Author(s):  
J C Kim ◽  
J H Park ◽  
I C Kim ◽  
C Lee ◽  
M K Cheoun ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Performance Test ◽  
Conventional Technique ◽  
National University ◽  
Mass Spectrometry Facility ◽  
Seoul National University ◽  
Accelerator System

The accelerator mass spectrometry facility at the Seoul National University (SNU-AMS) was completed in December 1998 and a report was presented at the Vienna AMS conference in September 1999. At the conference, we described the basic components of our accelerator system and reported the results of the performance test. Since then, extensive testing of the accuracy and reproducibility of the system has been carried out, and about 200 unknown samples have been measured so far. We obtained a precision of 4‰ for modern samples, and an accuracy of approximately 40 yr was demonstrated by analyzing samples that were previously dated with a conventional technique and by other AMS laboratories. We present these results here, together with detailed descriptions of our data-taking and analysis procedures.

scholarly journals Seoul National University Accelerator Mass Spectrometry (SNU-AMS) Radiocarbon Date List I

Radiocarbon ◽  
2006 ◽  
Vol 48 (2) ◽  
pp. 259-266 ◽  
Author(s):  
J C Kim ◽  
M Y Youn ◽  
I C Kim ◽  
J H Park ◽  
Y M Song ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Catalytic Reduction ◽  
Sample Pretreatment ◽  
Environmental Data ◽  
Geological Samples ◽  
National University ◽  
Mass Spectrometry Facility ◽  
Seoul National University ◽  
Accelerator System

The accelerator mass spectrometry facility at Seoul National University (SNU-AMS) began functioning in December 1998 and was first reported at the Vienna AMS conference in October 1999 and at the 17th International Radiocarbon Conference in Israel in June 2000. At the Vienna conference, we reported our accelerator system (Kim et al. 2000) and details of the basic sample preparation system (Lee et al. 2000), such as the combustion line to produce CO2; the catalytic reduction line for the graphitization of CO2; and the pretreatment procedures for wood, charcoal, and peat samples. The recent progress of the AMS facility (Kim et al. 2001) and the extension of the sample pretreatment system to iron and bone samples were reported at the 17th International Radiocarbon Conference (Cheoun et al. 2001). In the meantime, extensive testing of accuracy and reproducibility has been carried out, and ∼1000 unknown archaeological and geological samples have been measured every year. In this report, the archaeological, geological, and environmental data carried out in 1999 are presented in terms of yr BP.

scholarly journals Seoul National University Accelerator Mass Spectrometry (SNU-AMS) Radiocarbon Date List II

Radiocarbon ◽  
2006 ◽  
Vol 48 (2) ◽  
pp. 267-283 ◽  
Author(s):  
J C Kim ◽  
M Y Youn ◽  
I C Kim ◽  
J H Park ◽  
Y M Song ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Catalytic Reduction ◽  
Sample Pretreatment ◽  
Environmental Data ◽  
Geological Samples ◽  
National University ◽  
Mass Spectrometry Facility ◽  
Seoul National University ◽  
Accelerator System

The accelerator mass spectrometry facility at Seoul National University (SNU-AMS) began functioning in December 1998 and was first reported at the Vienna AMS conference in October 1999 and at the 17th Radiocarbon Conference in Israel in June 2000. At the Vienna conference, we reported our accelerator system (Kim et al. 2000) and the basic sample preparation system (Lee et al. 2000), including the combustion line to produce CO2; the catalytic reduction line for the graphitization of CO2; and also pretreatment procedures for wood, charcoal, and peat samples. Recent progress of the AMS facility (Kim et al. 2001) and extension of the sample pretreatment system to iron and bone samples were reported at the 17th Radiocarbon Conference (Cheoun et al. 2001). In the meantime, extensive testing of accuracy and reproducibility has been carried out, and ∼1000 unknown archaeological and geological samples have been measured every year. A report of data carried out in 1999 is presented by Kim et al. (this issue). In this report, the archaeological, geological, and environmental data carried out in 2000 are presented in terms of yr BP.

scholarly journals Progress in Radiocarbon Target Preparation at the Antares AMS Centre

Radiocarbon ◽  
2001 ◽  
Vol 43 (2A) ◽  
pp. 275-282 ◽  
Author(s):  
Q Hua ◽  
G E Jacobsen ◽  
U Zoppi ◽  
E M Lawson ◽  
A A Williams ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
Accelerator Mass Spectrometry ◽  
Sample Pretreatment ◽  
Small Samples ◽  
Sample Processing ◽  
Target Preparation ◽  
Recent Developments ◽  
Technical Details ◽  
Fe Reduction

We present routine methods of target preparation for radiocarbon analysis at the ANTARES Accelerator Mass Spectrometry (AMS) Centre, as well as recent developments which have decreased our procedural blank level and improved our ability to process small samples containing less than 200 μg of carbon. Routine methods of 14C sample preparation include sample pretreatment, CO2 extraction (combustion, hydrolysis and water stripping) and conversion to graphite (graphitization). A new method of cleaning glassware and reagents used in sample processing, by baking them under a stream of oxygen, is described. The results show significant improvements in our procedural blanks. In addition, a new graphitization system dedicated to small samples, using H2/Fe reduction of CO2, has been commissioned. The technical details of this system, the graphite yield and the level of fractionation of the targets are discussed.

scholarly journals Accelerator Mass Spectrometry of 14C at the Australian National University

Radiocarbon ◽  
1992 ◽  
Vol 34 (3) ◽  
pp. 452-457 ◽  
Author(s):  
L. K. Fifield ◽  
G. L. Allan ◽  
T. R. Ophel ◽  
M. J. Head
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
Accelerator Mass Spectrometry ◽  
Injection System ◽  
Measurement Capability ◽  
Mode Of Operation ◽  
National University ◽  
Slow Cycling

A 14C measurement capability has been developed on the 14UD accelerator at the Australian National University. At present, this system operates on a medium-precision, low-throughput basis with slow cycling between isotopes. We describe unusual features of the system, and review preliminary experience with this mode of operation, in sample preparation, and with a recently installed injection system.

scholarly journals Technological Advances in the University of Washington Accelerator Mass Spectrometry System

Radiocarbon ◽  
1983 ◽  
Vol 25 (2) ◽  
pp. 755-760 ◽  
Author(s):  
G W Farwell ◽  
P M Grootes ◽  
D D Leach ◽  
F H Schmidt
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Ion Source ◽  
The Past ◽  
Technological Advances ◽  
Recent Developments ◽  
Mass Spectrometry System ◽  
The University ◽  
Preparation Techniques ◽  
Accelerator System

During the past year we have continued to work toward greater stability and flexibility in nearly all elements of our accelerator mass spectrometry (AMS) system, which is based upon an FN tandem Van de Graaff accelerator, and have carried out measurements of 14C/12C and 10Be/9Be isotopic abundance ratios in natural samples. The principal recent developments and improvements in the accelerator system and in our sample preparation techniques for carbon and beryllium are discussed, and the results of a study of 10Be cross-contamination of beryllium samples in the sputter ion source are presented.

RADIOCARBON IN MEXICO: FROM PROPORTIONAL COUNTERS TO AMS

Radiocarbon ◽  
2021 ◽  
pp. 1-7
Author(s):  
Corina Solís ◽  
Efraín Chávez ◽  
Arcadio Huerta ◽  
María Esther Ortiz ◽  
Alberto Alcántara ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
High Voltage ◽  
Accelerator Mass Spectrometry ◽  
Science And Technology ◽  
National Council ◽  
University Of Arizona ◽  
Technological Developments ◽  
High Voltage Engineering ◽  
The University

ABSTRACT Augusto Moreno is credited with establishing the first radiocarbon (14C) laboratory in Mexico in the 1950s, however, 14C measurement with the accelerator mass spectrometry (AMS) technique was not achieved in our country until 2003. Douglas Donahue from the University of Arizona, a pioneer in using AMS for 14C dating, participated in that experiment; then, the idea of establishing a 14C AMS laboratory evolved into a feasible project. This was finally reached in 2013, thanks to the technological developments in AMS and sample preparation with automated equipment, and the backing and support of the National Autonomous University of Mexico and the National Council for Science and Technology. The Mexican AMS Laboratory, LEMA, with a compact 1 MV system from High Voltage Engineering Europa, and its sample preparation laboratories with IonPlus automated graphitization equipment, is now a reality.

scholarly journals Radiocarbon Sample Preparation at the Circe AMS Laboratory in Caserta, Italy

Radiocarbon ◽  
2007 ◽  
Vol 49 (2) ◽  
pp. 225-232 ◽  
Author(s):  
Isabella Passariello ◽  
Fabio Marzaioli ◽  
Carmine Lubritto ◽  
Mauro Rubino ◽  
Antonio D'Onofrio ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
Accelerator Mass Spectrometry ◽  
Isotope Fractionation ◽  
Background Levels

A system with several lines for the preparation of graphite targets for radiocarbon analysis has been built at the new accelerator mass spectrometry (AMS) facility in Caserta, Italy. Special attention has been paid in the design to the reduction of background contamination during sample preparation. Here, we describe the main characteristics of these preparation lines. Results of tests performed to measure 14C background levels and isotope fractionation in several blank samples with the Caserta AMS system are presented and discussed.

scholarly journals Dating Organic Temper of Ceramics By Ams: Sample Preparation and Carbon Evaluation

Radiocarbon ◽  
1999 ◽  
Vol 41 (3) ◽  
pp. 315-320 ◽  
Author(s):  
Denise C Gomes ◽  
Oscar Vega
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
Accelerator Mass Spectrometry ◽  
Total Carbon ◽  
Archaeological Ceramics ◽  
Brazilian Amazonia ◽  
Ceramic Samples

We describe a new methodology for separating organic temper from archaeological ceramics from Brazilian Amazonia. These experimental procedures were designed to directly date ceramic samples by accelerator mass spectrometry (AMS). An evaluation of the total carbon indicates the samples’ potential for dating.

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